Category: Class 4

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 3 Chapter 1 Green Environment Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 3 Chapter 1 Green Environment

Samacheer Kalvi 4th Science Guide Green Environment Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
What is the first step in waste management?
(a) Waste disposal
(b) Waste separation
(c) Waste collection
Answer:
(b) Waste separation

Question 2.
Which is an example for non-biodegradable waste?
(a) Paper cup
(b) Plastic cup
(c) Coconut shell
Answer:
(b) Plastic cup

Question 3.
Picking up the waste is called ____________
(a) Waste collection
(b) The environment
(c) Litter
Answer:
(a) Waste collection

Question 4.
___________ is the first ‘R’ in the Three R’s.
(a) Reuse
(b) Reduce
(c) Recycle
Answer:
(b) Reduce

II. Fill in the blanks :

Question 1.
_____________ is an example of reusing waste. (Using old jars for pickle / Saying not to a plastic bag)
Answer:
Using old jars for pickle

Question 2.
____________ is used to make bags, dustbins and tooth brushes. (Rose / Bamboo)
Answer:
Bamboo

Question 3.
____________ is a big threat to our environment. (Plastic pollution / Light pollution)
Answer:
Plastic pollution

Question 4.
___________ is a non-recyclable item. (Glass / Multilayer plastics)
Answer:
Multilayer -plastics

III. Match the following :

Question 1.

Answer:

IV. Write True or False :

Question 1.
3R method reduces the amount of waste that goes to landfills.
Answer:
True

Question 2.
Eco-friendly material is harmful to the environment.
Answer:
False

Question 3.
Plastic bag, thermocol and multilayer plastics are recyclable.
Answer:
False

Question 4.
We should not separate our waste.
Answer:
False

V. Answer in one or two sentences :

Question 1.
What are the Three R’s?
Answer:
The three R’s stand for REDUCE, REUSE, RECYCLE.

Question 2.
What is bio-degradable waste?
Answer:
Bio-degradable waste is a form of waste, originating naturally from plant
or animal sources, which may be degraded by other living organisms.

Question 3.
Write the different steps in waste management.
Answer:

• Separation of waste
• Waste collection and transportation
• Waste recycling and composting
• Waste disposal

Question 4.
Name five items which are recyclable.
Answer:
Paper, glass, metal, cardboard and plastic covers.

VI. Answer the following :

Question 1.
How will you manage the household waste?

• Divide the waste into different waste bins.
• Each bin should have different type of wastes.
• Green for biodegradable waste, Blue for recyclable waste and Red for non-recyclable waste.

Question 2.
What are the plastic items that have been banned in Tamil Nadu?
Answer:
Plastic bags, plastic plates, water pouches, plastic straws, plastic sheets.

Question 3.
Write the benefits of recycling.
Answer:

• Old newspapers, note books and magazines are sold to a scrap dealer. They will be made into new paper.
• PET bottles are recycled into plastic threads and used to make sports T-shirts.
• Old glass bottles and broken glass pieces are melted to make new glass.
• Broken metal items like tiffin boxes and plates are melted and made into new metal products like toys.

Question 4.
What is known as eco-friendly material?
Answer:
Materials which are beneficial to the environment and do not cause harm are called eco-friendly materials

Samacheer Kalvi 4th Science Guide Green Environment In Text Questions and Answers

Activity (Text Book Page No. 65)

Question 1.
Write the waste management process in the correct order.
(Waste disposal, Waste collection and transportation, Waste separation, Waste recycling and composting)
Answer:

1. Waste separation
2. Waste collection & transportation
3. Waste recycling A composting
4. Taste disposal

Activity (Text Book Page No. 67)

Question 1.
List out four things that you can reduce, reuse and recycle at home or school.

Reduce	Reuse	Recycle

Answer:

Reduce	Reuse	Recycle
Use of plastic carry bags	Old clothes to clean home & cycle	Old newspapers, notebook, magazine
Buy food in bulk & avoid plastic bags	Use jam & pickle jars to store things.	Old glass bottles to make new bottles
Buy a refill instead of a pen	Clothes that look good can be donated to poor	Broken metal items to make toys
Turn off lights and fans when you leave a room	Reuse waste & make something new	Pet bottle to make plastic thread

Activity (Text Book Page No. 70)

Study the images below and write down three items you have at home in each category of waste.

Question 1.

Answer:
Biodegradable: Vegetable peels, fruit peels, mat

Question 2.

Answer:
Recyclable: Glass, metal, paper & cardboards

Question 3.

Answer:
Non-recyclable : Plastic baas, CFL lights, mixed electronic wastes

Activity (Text Book Page No. 74)

Question 1.
Write any five non-recyclable items that you use or*have seen in shop.
Answer:
CFL lights, plastic bags, mixed electronic wastes, medical wastes, polyester.

Samacheer Kalvi 4th Science Guide Green Environment Additional Questions and Answers

I. Choose the correct answers :

Question 1.
Unwanted materials pollute our ___________
(a) Land
(b) Air
(c) Both a and b
Answer:
(c) Both a and b

Question 2.
____________ is the very important step in waste management.
(a) Separation of waste
(b) Waste disposal
(c) Waste collection
Answer:
(a) Separation of waste

Question 3.
_______________ is to take materials from things you throw away and make new products with them.
(a) Reduce
(b) Reuse
(c) Recycle
Answer:
(c) Recycle

Question 4.
____________ can return back to the soil and become food for plants.
(a) Biodegradable
(b) Non-degradable
(c) Recyclable
(d) None
Answer:
(a) Biodegradable

Question 5.
_____________ is an example for eco-friendly material.
(a) Leaf plate
(b) Plastic plate
(c) Thermocol plate
Answer:
(a) Leaf plate

II. Fill in the blanks :

Question 1.
Picking up the waste is called ___________ (waste disposal / waste collection)
Answer:
waste collection

Question 2.
____________ waste can be turned into something new which is valuable. (Recyclable / Non – recyclable)
Answer:
Recyclable

Question 3.
is using something repeated for the same or for another purpose. (Reuse / Reduce)
Answer:
Reuse

Question 4.
___________ of our environment means to protect all things found in nature. (Observation / Conservation)
Answer:
Conservation

Question 5.
Plastic bags and food packaging is a _____________ item. (non-recyclable / recyclable)
Answer:
Non-recyclable

III. True or false :

Question 1.
It is best to separate waste into 3 different bins.
Answer:
True

Question 2.
Reuse is to make or use less
Answer:
False

Question 3.
Broken glass pieces are melted to make new glass.
Answer:
True

Question 4.
We should conserve our natural resources and energy
Answer:
True

IV. Answer the following :

Question 1.
What is separation of waste?
Answer:
It means to sort or divide the waste into different waste bins.

Question 2.
What is waste collection?
Answer:
Picking up the waste by our municipality or corporation is called waste collection.

Question 3.
What is transportation?
Answer:
Moving the waste from one place to another is called transportation.

Question 4.
What is compost?
Answer:

1. Compost is the decayed organic material which is obtained from the biodegradable waste.
2. Compost makes the soil fertile.

Question 5.
What is waste disposal or final disposal?
Answer:
The waste that cannot be recycled (non-recyclable waste) needs to be sent for final disposal.

Question 6.
What is Reduce?
Answer:
Reduce is to make or use less materials.

Question 7.
What is Reuse?
Answer:
Reuse is using a thing repeatedly for the same or for another purpose.

Question 8.
What is Recycle?
Answer:
Recycle is to take materials from things you throw away and make new products by using them.

Question 9.
Name some materials that you can at home recycle?
Answer:

• PET bottles
• Old glass bottles and broken glass pieces
• Broken metal items

V. Answer in detail :

Question 1.
Write down the eco-friendly activities.
Answer:

• Reduce your paper use by writing on both sides of every sheet.
• Stop using plastic straws.
• Use reusable bag.
• Give up chewing gum.
• Buy stainless steel bottles instead of plastic water bottles.
• Reuse containers for storing left overs.

Question 2.
What is meant by conservation of environment?
Answer:

• Conservation of environment means to protect all things found in nature.
• It means that we have to use our Earth’s natural resources (like water, soil, minerals, wildife and forests) carefully.
• Everyone can conserve the environment by good waste management habits.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 2 Chapter 3 Plants Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 2 Chapter 3 Plants

Samacheer Kalvi 4th Science Guide Plants Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
The tip of the leaf is
(a) Blade
(b) Apex
(c) Midrib
(d) Veins
Answer:
(b) Apex

Question 2,
Which one of the following is a primary producer?
(a) Plant
(b) Animal
(c) Human
(d) None of the above
Answer:
(a) Plant

Question 3.
Which flower blooms during winter?
(a) Jasmine
(b) Tulip
(c) December
(d) Fire cracker
Answer:
(c) December

Question 3.
Choose the ornamental plant from the list.
(a) Parthenium
(b) Mango
(c) Travellers palm
(d) Groundnut
Answer:
(c) Travellers palm

Question 4.
Which plant flower is edible?
(a) Cauliflower
(b) Potato
(c) Mint
(d) Cabbage
Answer:
(a) Cauliflower

II. Fill in the blanks :

Question 1.
During photosynthesis ____________ is produced and stored in the leaf.
Answer:
Food

Question 2.
Green plants have ____________ pigment.
Answer:
Green

Question 3.
Onion is a ____________ part of a plant.
Answer:
Stem

Question 4.
The male part of the flower is ___________.
Answer:
Stamen

Question 5.
An example for edible seed is _____________ .
Answer:
Rice

III. Answer the following in one or two words :

Question 1.
Which is the female part of the plant?
Answer:
Pistil.

Question 2.
Write the name of any one of the leaf that is used as a food.
Answer:
Cabbage.

Question 3.
Which flower bud is used as spices in food?
Answer:
Cloves.

Question 4.
What are the nutrients present in the seeds?
Answer:
Carbohydrates and proteins.

Question 5.
Write any one of the flower that blooms in summer.
Answer:
Sunflower.

IV. Answer briefly :

Question 1.
Write the parts of the leaf.
Answer:

1. Apex
2. Veins
3. Midrib
4. Blade
5. Petiole

Question 2.
Define – Photosynthesis.
Answer:
Photosynthesis is a process by which plants make their food using chlorophyll, water, carbon dioxide in the presence of sunlight.

Question 3.
Write the names of the exotic plants.
Answer:

1. Sago palm (Cycas)
2. Fern
3. Crotons
4. Travelers palm
5. Boat lily
6. Aloevera

Question 4.
Write the names of any two underground stem plant.
Answer:
Potato and Onion are underground stem plants.

Question 5.
Why should we not touch parthenium plant?
Answer:
The pollen of parthenium plant is allergic in nature, so, we do not touch this plant.

V. Answer detail :

Question 1.
Mask any four parts and describe the parts of a leaf.
Answer:

Blade: The broad flat part of the leaf (Lamina).
Apex: The tip of the leaf.
Midrib: The midrib runs along the centre of the leaf.
veins: Veins are branch out from the midrib. They are the framework of hollow tubes that carry water and minerals.
Petiole: This part joins the leaf to the main stem.

Question 2.
Draw a diagram of a flower and explain the parts of a flower.
Answer:

the four visible parts of a flower are explained below.
Sepal: Sepals are leaves that protect the flower while it is still a bud. Sepals are usually green in colour.
Petal: Petals are often bright coloured. Their main job is to attract insects such as bees or butterflies, to the flower. The insects help the flowers in the transfer of pollen grains.
Stamen: Stamen can be seen at the centre of a flower. They contain pollen grains that help the plants to multiply. It is the male part of a flower.
Pistil: Pistil is also seen at the centre of the flower. The pistil uses the pollen to help the flower become the fruit. It is the female part of a flower.

Samacheer Kalvi 4th Science Guide Plants InText Questions and Answers

Think and Answer (Text Book Page No. 78)

Question 1.
Which part of the leaf collects carbon dioxide?
Answer:
Stomata, the small pores, found at the base of the leaf, collects carbon dioxide.

Question 2.
Which part of the leaf transports water?
Answer:
The vascular tissues, called xylem, transports water from the roots to the leaves.

Think and Answer (Text Book Page No. 79)

Question 1.
Why would living things not be able to live without plants?
Answer:
Humans and animals depend on plants for their food either directly or indirectly. So, things would not be able to live without plants.

Try to Answer (Text Book Page No. 79)

Fill in the blanks by rearranging the letters in the bracket :

Question 1.
During photosynthesis plants releases __________ (egxyno).
Answer:
Oxygen

Question 2.
___________ is a primary producer, (tanpl).
Answer:
Plant

Question 3.
Stomata are seen in the ___________ (owler) surface of the leaf.
Answer:
Lower

Question 4.
Pigment involved in the food synthesis is ______ . (phllylochor).
Answer:
Chlorophyll

Let us do (Text Book Page No. 79)

Take two potted plants. Keep one in sunlight and other in a fully covered box. Water them regularly. After a week observe the plants.

Answer:

Let us do (Text Book Page No. 81)

Question 1.
List out the flowering and Non-flowering plants in your surrounding.

Flowering plants	Non-flowering plants

Answer:

Flowering plants	Non-flowering plants
Tomato plant	Fern
Mango tree	Mosses
Coconut tree	Redwood tree

Let us do (Text Book Page No. 82)

Question 1.
List out the places where you see the non-green plants
Answer:
Non-green plants grow on decaying organic matters such as cow-dung, wood, bread, etc. Mushroom, Bracket fungi grow in such places.

Try to Answer (Text Book Page No. 82)

Fill in the blanks :

Question 1.
__________ is an example for non flowering plant.
Answer:
Algae/Fungi /Fern

Question 2.
Plants are classified based on pigment and ___________ of the plant.
Answer:
Flower

Question 3.
______ depend on other organism to live and get their food.
Answer:
Plants

Question 4.
Autotrophs use _________ , __________ and chlorophyll to prepare their own food.
Answer:
Atmosphere,light

III. Part of Flower :

Have you seen flowers? Try to answer the questions given below

Question 1.
Which is your favourite flower?
Answer:
Jasmine

Question 2.
What is the colour of the flower?
Answer:
White

Question 3.
How does it smell?
Answer:
A sharp, sweet smell

Try to Answer (Text Book Page No. 83)

Fill in the blanks :

Question 1.
Sepals _____________ the flower while it is still a bud.
Answer:
Protect

Question 2.
Stamen contains _____________ grains.
Answer:
Pollen

Question 3.
Pistil is ___________ part of a flower.
Answer:
Centre

Let us do (Text Book Page No. 83)

Bring few hibiscus flowers to the classroom. Distribute the flowers to children. Introduce the parts of the flower to them. Then, ask them to observe and feel the different parts of the flower and tell them to record their observation.

Parts of flower	What is its colour?

 

Answer:

Parts of flower	What is its colour?
petal	Orange – Red
Sepal	Green
Pistil	Light Green
Stamen	Red – Anther Green – Filament

Think and Answer (Text Book Page No. 84)

Question 1.
Can you name the four seasons?
Answer:
Spring, Summer, Autumn and Winter.

Try to Answer (Text Book Page No. 86)

Find the odd one :

Question 1.
December, Tuberose, Tulip.
Answer:
Tulip

Question 2.
Saffron, Tulip, Rose.
Answer:
Rose

Question 3.
Crotons, Boat lily, Rose.
Answer:
Rose

Try to Answer (Text Book Page No. 88)

Fill in the blanks :

Question 1.
____________ flower is used as food.
Answer:
Banana

Question 2.
____________ part of the potato plant is used as food.
Answer:
Stem

Question 3.
Stem of the stores ____________ food in it.
Answer:
plant

Question 4.
Seeds are rich in ___________ and___________ .
Answer:
Carbohydrates, proteins

Let us do (Text Book Page No. 89)

Complete the table to show which parts of the plant we eat.
Question 1.

Food items	Parts of the plants eaten

Answer:

Food items	Parts of the plants eaten
Carrot	Root
Banana	fruit
Mango	fruit
Cauliflower	flower
Rice	seed
Dhal	seed
Moringo	leaves
Turmeric	stem
Onion	stem
Cabbage	leaves
Jackfruit	fruit
Beetroot	root

 

Samacheer Kalvi 4th Science Guide Plants Additional Questions and Answers

I. Choose the correct answer :

Question 1.
The ____________ runs along the centre of the leaf
(a) Veins
(b) Midrib
(c) petiole
(d) Lamina
Answer:
(b) Midrib

Question 2.
The largest flower in the world is found in the rain forests of ____________.
(a) India
(b) Australia
(c) Indonesia
(d) South Africa
Answer:
(c) Indonesia

Question 3.
Bamboo plants can grow upto __________ in one day.
(a) 60 cm
(b) 70 cm
(c) 80 cm
(d) 90 cm
Answer:
(d) 90 cm

II. Fill in the blanks with suitable answer :

Question 1.
The broad flat part of the leaf _____________.
Answer:
Lamina

Question 2.
___________ helps the plants to breathe.
Answer:
Stomata

Question 3.
___________ food is made in their green stems.
Answer:
Cactus

Question 4.
The largest flower in the world is __________.
Answer:
Rafflesia

III. Write True or False :

Question 1.
The seasons are four.
Answer:
True

Question 2.
Bamboo plants can grow upto 70cm in the day.
Answer:
False

IV. Answer briefly :

Question 1.
What are primary producers?
Answer:
As plants prepare food for themselves and also for other living things, they are called primary producers.

Question 2.
How are plants classified?
Answer:
Plants are classified in many ways based on stems, life span, seeds, flower and colour. In this session we will study about the classification of plants based on the flower and colour.

V. Answer briefly :

Question 1.
Differentiate : Flowering plants and Non-flowering plants
Answer:

Flowering plants	Non-flowering plants
1.      Plants bearing flowers are called flowering plants.	Plants without flower that can reproduce are called non-flowering plants
2.      It reproduce by sex cells or gametes and produce seeds. Seeds produce new plants.	They reproduce by a special structure called spores.
3.      Example: Mango, Neem, groundnut, paddy.	Algae, Fungi, fern.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 2 Water 1 Food Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 2 Chapter 2 Water

Samacheer Kalvi 4th Science Guide Water Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
Water is the most _____________ resource on the Earth.
(a) Precious
(b) Solid
(c) Gas
Answer:
(a) Precious

Question 2.
Water exists in _____________ states.
(a) Two
(b) Three
(c) Four
Answer:
(b) Three

Question 3.
At temperature below ____________ water freezes to form ice.
(a) 10°C
(b) 100°C
(c) 0° C
Answer:
(c) 0°C

Question 4.
___________ is the process by which water becomes water vapour.
(a) Condensation
(b) Evaporation
(c) Freezing
Answer:
(b) Evaporation

Question 5.
Which controls the ecological functions of life?
(a) Bicycle
(b) Water cycle
(c) Recycle water
Answer:
(b) Water cycle

II. Fill in the blanks with suitable answer :

Question 1.
Water is converted into ____________ when it is heated. (ice cube/water vapour).
Answer:
water vapour

Question 2.
Water becomes ice on ____________. (heating/freezing).
Answer:
Freezing

Question 3.
Water droplets combine to form _____________. (rain/clouds).
Answer:
Clouds

Question 4.
Water cycle increases the availability of ______________. (water tank/ground water).
Answer:
Ground water

Question 5.
___________ is a type of rainwater harvesting. (Roof top harvesting/Watercycle).
Answer:
Roof top harvesting

III. Write True or False :

Question 1.
Water is a good example for all states of matter.
Answer:
True

Question 2.
Water cycle controls Earth’s temperature.
Answer:
True

Question 3.
Water becoming water vapour on heating is called evaporation.
Answer:
True

Question 4.
37% of our brain’s mass consists of water.
Answer:
False

Question 5.
Roof top harvesting method is used in agriculture field.
Answer:
False

IV. Answer briefly :

Question 1.
Write the states of water.
Answer:
Water occurs naturally in three forms: ice, water and water vapour. These forms are also called states of water. Ice is in solid form, water is in liquid form and water vapour is in gaseous form.

Question 2.
What is freezing?
Answer:
Ice is a solid form of water. At temperature below 0° C water becomes ice. This process is called freezing.

Question 3.
Name the processes involved in water cycle.
Answer:
Evaporation, Condensation, Precipitation.

Question 4.
Which state government made rain water harvesting as mandatory in the year 2001?
Answer:
Tamil Nadu is the first Indian state which made rainwater harvesting as mandatory in 2001.

Question 5.
What is needed to construct a rain water harvesting pit?
Answer:
Boulders, gravels and Coarse sand are needed to construct a rain water harvesting pit.

V. Answer in detail :

Question 1.
What is water cycle? Write any three importances of water cycle.
Answer:
The continuous cycle through which water is circulated by different processes like evaporation, condensation and precipitation is called water cycle.
Importances of water cycle :

• To improve the availability of ground water.
• To control the Earth’s temperature.
• To provide water to plants and animals especially humans.
• To recycle the Earth’s supply of water constantly.

Question 2.
What is rain water harvesting? List out the advantages of rain water harvesting.
Answer:
‘Rainwater harvesting’ is the process of collecting and storing rainwater for future use. Rainwater can be collected in natural reservoirs or artificial tanks. Roof top harvesting is also a type of rainwater harvesting. The rainwater on the top of the building is collected and passed into the ground through pipes.

Water passing thrcugh the pipes enters the pit which consist of gravels and Coarse sand. As it passes impurities are filtered and stored as ground water.
Advantages of rain water harvesting:

• It increases the ground water level
• It can be used for agriculture
• It increases the availability of water for living things.

V. Colour the given picture and write the correct name in the given blanks :

Question 1.

Answer:
Activity to be done by the students themselves

Samacheer Kalvi 4th Science Guide Water InText Questions and Answers

Let us do (Text Book page No. 69)

Question 1.
See the given pictures and write down the state of each objects.(Solid, Liquid, Gas)

Answer:

Let us do (Text Book page No. 70)

Question 1.
Fill in the boxes given below with correct answers.
(Liquid, Solid, Melting, Freezing, Cooling, Heating, Gas)

Answer:
Change of states in water

Question 2.
Write any two water bodies in your area
Answer:
River, lake

Try to Answer (Text Book page No. 71)

Question 1.
Why water is a good example for all states of matter?
Answer:
Water is unique because it is the only natural substance that can exist in all three states of matter at the temperatures normally found on Earth! Water is usually a liquid, but when it reaches to 0° C (32° Fahrenheit (F)), it freezes into ice. (Ice is the solid state of water.) When water reaches 100° C (212° F), it boils.

When it begins to boil, some of the water turns into steam. (Steam is the gas state of water, and is also called water vapour.) When steam comes into contact with cool air (which reduces energy), it can condense back into water droplets (liquid again). Those water droplets could then freeze into (solid) ice.

Question 2.
Which of the following is in liquid state? Rain/Ice/Snow
Answer:
Rain.

Let us do (Text Book page No. 71)

Question 1.
Fill water in an ice tray and keep it in the freezer. After few hours, take it out. What happened to the water?
Answer:
Water turns into Ice (Solid state).

Question 2.
Now keep this ice tray on a table for some time. What happens to the ice?
Answer:
Ice melts and turns into liquid.

Question 3.
Pour water from the ice tray into a kettle. Ask an elder at your home to heat the kettle and observe the mouth of the kettle when the water starts boiling. What do you see?
Answer:
I see the water turns into vapour and bubbles are formed.

Think and Answer (Text Book page No. 72)

Question 1.
What happens to the water in a wet cloth?
Answer:
The water, in a wet cloth, gets evaporated. The cloth will be dried up.

Try to Answer (Text Book page No. 72)

Choose the correct answer.

Question 1.
In the water cycle ____________.
(a) Only evaporation is involved
(b) Only condensation is involved
(c) Evaporation and condensation are involved
Answer:
(c) Evaporation and condensation are involved

Try to Answer (Text Book page No. 72)

Question 1.
Unscramble the words and fill in the blanks.
(a) ondencsaonti
Answer:
Condensation

(b) vaeionorpat
Answer:
evaporation

c) ecippitatrino
Answer:
(c) precipitation

Question 2.
Is water cycle important for farming? ____________
Answer:
Yes

Question 3.
Why is water cycle important to human? ________________
Answer:
The water cycle is constantly recycling the Earth’s supply of water. As humans need water to service, Water cycle is important.

Question 4.
Name the process which is responsible for the formation of droplets on the surface of a glass of cold drink. _______
Answer:
Condensation

Try to Answer (Text Book page No. 74)

Question 1.
List out some other benefits of rain water harvesting.
Answer:

• It reduces flooding and erosion.
• It can be used for non-drinking purposes, liking bathing, washing clothes, etc.
• It can improve plant Growth.

Question 2.
Suggest some ideas to save rainwater in your school.
Answer:

• Create awareness about the benefits of Rainwater Harvesting.
• Collect excess water by placing huge plastic drums.
• Install aerators on taps. Aerators reduce the amount of water flowing from the tap by upto 50%.
• Install rainwater tanks. Then connect the tanks to toilets or to the garden.

Let us do (Text Book page No. 74)

Question 1.
Discuss with your friends.
Rain water harvesting has an important role to protect our environment.
Answer:
Importance of Rainwater Harvesting :
Rainwater harvesting can be a permanent solution to the problem of the water crisis. This is particularly applicable in hilly areas where rainwater harvesting can be utilized for human consumption, for animals and also for farming.
A bad monsoon means low crop yield and shortage of food.

Even animals suffer from a scarcity of water. We face acute water crisis during the summer months. The farmers are the most affected because they do not get sufficient water for their fields. Rainwater harvesting, therefore, is an ideal solution for farmers who depend on monsoon for consistent water supply.

Unavailability of clean water compels the consumption of polluted water, giving rise to water-borne diseases and a high rate of infant mortality.

If rainwater, which comes for free, can be collected and stored, instead of letting it run off, it could be an alternative to back up the main water supply especially during dry spells.

Its importance will not be limited to an individual family but can be used by a community as well. It also creates a sense of social responsibility and awareness about the environment.

The importance of rainwater harvesting lies in the fact that it can be stored for future use. Harvesting rainwater checks surface runoff of water and reduce soil erosion.

In areas having sparse and irregular rainfall, scarcity of water is a persistent problem. It cannot be completely resolved but can be mitigated through rainwater harvesting.

Samacheer Kalvi 4th Science Guide Water Additional Questions and Answers

I. Choose the best answer :

Question 1.
Ice is in form of ____________.
(a) Gas
(b) Liquid
(c) Solid
(d) Vapour
Answer:
(c) Solid

Question 2.
____________ of our brain’s mass consists of water
(a) 43%
(b) 53%
(c) 63%
(d) 73%
Answer:
(d) 73%

Question 3.
The Antartic region has about ___________ of the worlds fresh water.
(a) 70%
(b) 60%
(c) 50%
(d) 40%
Answer:
(a) 70%

Question 4.
__________ is the chemical formula of water.
(a) H₂O
(b) HO
(c) H₃O₂
(d) O₂.
Answer:
(a) H₂O

II. Fill in the blanks with suitable answer :

Question 1.
Human body consists of _____________ of water. Water( 65% / 75%)
Answer:
75%

Question 2.
_____________ is the only way to conserve rain water. (Condensation/Rainwater harvesting)
Answer:
Rain water harvesting

Question 3.
Each day, we lose a little more than a cup of water when we exhale.(inhale/ exhale)
Answer:
Exhale

III. Write True or False :

Question 1.
The rainwater harvesting was launched by the Tamil Nadu government in 2011.
Answer:
False

Question 2.
1 inch of rainfall on a 2000 sq.ft. roof is equal to 4,800 litres of water.
Answer:
True

IV. Answer the following questions in one or two sentences :

Question 1.
Where is water available in the liquid state?
Answer:
Water in liquid state is available in water bodies such as oceans, river, waterfalls etc.

Question 2.
How will you get water vapour from water?
Answer:
Water becomes water vapour as the temperature increases due to heat. Heating forms a white mist of extremely small water droplets in the air known as water vapour.

V. Answer in detail :

Question 1.
How will you construct a rainwater harvesting pit?
Answer:
Tips to construct a rainwater harvesting pit at school/home. Construct a pit of any shape or size. It may be generally constructed, 1-2 metre wide and 2-3 metre depth. The pits can be filled with boulders, gravels and Coarse sand. Put the boulders in the bottom, sand in the top and gravels in the middle.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 2 Chapter 1 Food Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 2 Chapter 1 Food

Samacheer Kalvi 4th Science Guide Food Text Book Back Questions and Answers

I. Choose the heat answer :

Question 1.
Which one can be eaten as raw food?
(a) Meat
(b) Carrot
(c) Fish
(d) Potato
Answer:
(b) Carrot

Question 2.
Uncooked food is called
(a) Junk food
(b) Hygienic food
(c) Raw food
(d) Cooked food
Answer:
(c) Row food

Question 3.
Solar cooker reduces _____________.
(a) Air pollution
(b) Water pollution
(c) Air pollution
(d) Noise pollution
Answer:
(c) Air pollution

Question 4.
Which one cannot be preserved by drying method?
a) Rice
b) Cereals
c) Fish
d) Fruits
Answer:
(a) Rice

Question 5.
We can avoid food wastage by
(a) Giving to the needy
(b) Eating more than we need
(c) Buying extra food
(d) Throwing in a dust bin
Answer:
(a) Giving to the needy

II. Fill in the blanks :

Question 1.
__________ gives us energy to work and play. (Raw food / Junk food)
Answer:
Raw food

Question 2.
Cooked food is easily ___________. (digested / undigested)
Answer:
Digested

Question 3.
Pressure cooker is one of the ____________ utensils, (modern / olden)
Answer:
Modern

Question 4.
We need pure air, protected water and ____________ food for our healthy life. (junk / hygienic)
Answer:
Hygienic

III. Match the following :

Question 1.

Answer:

IV. Write Yes or No :

Question 1.
Biriyani is a raw food.
Answer:
No

Question 2.
Frying is a method of cooking.
Answer:
Yes

Question 3.
We can cook rice on a tawa.
Answer:
No

Question 4.
Cooking in a solar oven needs sunlight.
Answer:
Yes

Question 5.
Consuming too much oily food is bad for our health.
Answer:
Yes

V. Answer briefly :

Question 1.
Name any three cooking methods.
Answer:

1. Boiling
2. Steaming
3. Baking

Question 2.
Write any two food items you should eat when you are sick?
Answer:

• Porridge of rice or cereals.
• Fruit juice, tender coconut.
• Steamed foods like idly.

Question 3.
Draw one of your favourite raw food and colour it.
Answer:
Raw foods : Mango,Apple, Banana, Carrot, Onion, etc.
Student has to draw any one item and colour it.

Question 4.
Write about any two preservation methods.
Answer:

• Pickling – Mixing fruits and vegetables with oil and salt. Example- Pickle
• Refrigerating – Keeping food in the refrigerators (fridge) to preserve them for a short time. Example-Fruits,Vegetables

Question 5.
How can you reduce wastage of food in your home?
Answer:
We should not waste food. Food that is not eaten is called leftover food. That is discarded as waste. Following are the simple ways to avoid food wastage.

1. Take what you’ll eat and eat what you take.
2. Share the excess food.
3. Give the excess food to hungry animals.

V. Answer in detail :

Question 1.
Explain some food preservation methods.
Answer:
We can preserve the food for long time by using the following methods.

• Pickling – Mixing fruits and vegetables with oil and salt.
  Example: Pickle
• Refrigerating – Keeping food in the refrigerators (fridge) to preserve them for a short time.
  Example: Fruits,Vegetables
• Drying – Removing the water content of the food.
  Example: Fish, Red chillies
• Canning – Storing food in air tight containers.
  Example: Jam

Question 2.
Explain any four cooking methods.
Answer:
Some of the commonly used cooking methods are given below.

1. Boiling: It is a method of cooking food by immersing it in boiling water. So that the food becomes soft.
   Example: Rice, Egg.
2. Steaming: It is a method of cooking food in steam by immersing the vessel in a container with boiling water.
   Example: Idli, Idiyappam.
3. Pressure cooking: It is a method of cooking food in a pressure cooker. Example: Rice, Dhal.
4. Roasting: It is a method of cooking food by heating on a tawa or frying pan without covering it.
   Example: Groundnuts, Cashew nut.
5. Frying: It is a method of cooking food in hot oil.
   Example: Chips, Poori.

Question 3.
What are the hygenic ways of cooking food?
Answer:

• Wash your hands with soap before cooking.
• Wash vegetables and fruits before cutting.
• Wash cooking vessels and knives.
• Don’t cook food for a long time because it destroys the nutrients present in the food.
• Don’t use the same oil for cooking food many times.
• Using the food items after their expiry date is not good for health.

Let us do (Text Book Page No. 57)

Question 1.
Classify the following food items.

(Carrot, Egg, Coconut oil, Milk, Radish, Meat, Potato, Curd, Brinjal, Lady’sfinger, Fish, Drumstick, Butter, Onion, Buttermilk, Cucumber, Ghee)

Food items from Plants	Food items from animals
Carrot	Egg
Coconut oil	Milk
Radish	Meat
Potato	Curd
Brinjal	Fish
Lady’s finger	Butter
Drumstick	Buttermilk
Onion	Ghee
Cucumber	–

Samacheer Kalvi 4th Science Guide Food In Text Questions and Answers

Think and Answer (Text Book Page No. 58)

Question 1.
Which food do you eat without cooking?
Answer:
We eat fruits, some vegetables, tubers and nuts in the raw form. Some pulses ind cereals are also eaten as without cooking.

Try to Answer (Text Book Page No. 59)

Question 1.
Write any five raw and cooked food.
Answer:
(a) Raw food: Carrot ,Gooseberry ,Cucumber, Mango and Banana
(b) Cooked food: Rice , puttu , Idiyappam , Idli , and Dosal.

Think and Answer (Text Book Page No. 59)

Question 1.
Children, look at the menu card given here. Do you see food items on this menu? Do you think all these items are cooked the same way?

Answer:
No, All are not cooked in the same way.

Let us do (Text Book Page No. 61)

Question 1.
Tabulate the given food items according to the cooking methods.

Answer:
(Rice, Poori, Murukku, Pop-corn, Idli, Milk, Fish, Puttu, Dhal, Idiyappam, Groundnut)

Try to Answer (Text Book Page No. 61)

Question 1.
Write any two cooking methods that your mother follows:
Answer:
Boiling, Steaming.

Question 2.
Say True or False.
(a) You should wash your hands before cooking.
Answer:
True
(b) Vegetables and fruits should be washed after cutting.
Answer:
False

Let us do (Text Book Page No. 62)

Question 1.
Write the cooking utensils used for preparing given food items.

Answer:
(Pan, Pot, Rice cooker, Tawa, Idli cooker)

Food Items	Name the cooking utensils
Rice	Rice cooker
Idiyappam, Puttu	Idli cooker
Vada	Tawa
Sambar	Pot
Dosa	Pan

Try to Answer (Text Book Page No. 62)

Write True or False.

Question 1.
Earlier people cooked their food in pressure cooker.
Answer:
False

Question 2.
Solar cooker reduces the use of fuel.
Answer:
True

Question 3.
Pressure cooker is not a cooking utensil.
Answer:
False

Think and Answer (Text Book Page No. 63)

Question 1.
Look at the pictures given below. Which one is good for health? Why?

Answer:
Food items, in the right side picture, are good for health. The food items are neatly kept in a closed containers. The place is also free from mosquitoes, flies, etc.

Let us do (Text Book Page No. 64)

Tick (✓) the appropriate one.

Question 1.

Food	Hygienic food	Junk food
Fresh fruits
Burger
Nuts
Panipoori
Vegetable salad

Answer:

Food	Hygienic food	Junk food
Fresh fruits	✓
Burger		✓
Nuts	✓
Panipoori		✓
Vegetable salad	✓

Try to Answer (Text Book Page No. 64)

Question 1.
Junk food is good for health. _____________
Answer:
No

Question 2.
You should wash your hands before and after eating. ______________
Answer:
Yes

Let us discuss (Text Book Page No. 64)

Question 1.
Here is Nandini’s lunch box.

Answer:
(a) Are all the items healthy?
No. Chips are not healthy.
(b) Suggest her to remove one food which is not healthy and add one food which is healthy. Give reasons for change.
Answer:
Remove the chips item. Add ground nuts.

Think and answer (Text Book Page No. 63)

Question 1.
When you are sick, what kind of food your mother serves you?
Answer:
Idly, Porridge of rice, and fruit juices.

Try to Answer (Text Book Page No. 65)

Fill in the blanks.

Question 1.
___________ is an easily digested food. (Idly / Biriyani)
Answer:
Idly

Question 2.
We should avoid eating ___________ food, (junk/ fresh)
Answer:
Junk

Think and Answer (Text Book Page No. 65)

Question 1.
Do you usually eat your lunch without wasting anything? If you say no, why do you waste?
Answer:
Yes, I usually eat my lunch without wasting anything.

Question 2.
Can you suggest few ways to reduce food waste in your schools and houses?
Answer:

1. We should not take excess quantity of food in our plate.
2. We should serve others smaller portions of food on smaller dishes.
3. While purchasing the food products, we have to take care about the quantity

Try to answer (Text Book Page No. 65)

Fill the blanks :

Question 1.
World Hunger Day is observed on ____________
Answer:
May 28

Question 2.
We can preserve pickle by ___________
Answer:
pickling

Samacheer Kalvi 4th Social Science Guide Food Additional Questions and Answers

I. Choose the correct answer :

Question 1.
Healthy food
(a) Fruit
(b) chips
(c) chocolate
(d) ice cream
Answer:
(a) Fruit

Question 2.
Unhealthy food
(a) Nuts
(b) Milk
(c) Burger
(d) vegetables
Answer:
(c) Burger

Question 3.
Which one can be preserved by drying method?
(a) Pickles
(b) Vegetables
(c) Red chillies
(d) Jam
Answer:
(c) Red chillies

II. Fill in the blanks :

Question 1.
Cooking in ________ improves the quality and taste of food. (Aluminium Utensil/ clay pot)
Answer:
clay pot

Question 2.
____________ is one of the basic needs of life. (Clothes/ Food)
Answer:
Food

III. Match the following :

Question 1.

Answer:

VI. Answer tn brief :

Question 1.
Write a note on cooking utensils.
Answer:
Utensils are in different shapes and sizes. We use specific utensils for each cooking method. Clay pots were used earlier. Stainless steel and aluminum vessels are now generally used for cooking.

Question 2.
What is a Solar cooker?
Answer:
It is an appliance which is used to cook food using sunlight. It saves fuel and reduces air pollution.

Question 3.
What is Raw food?
Answer:
Food that we eat directly without cooking is called raw food. We eat fruits, some vegetables, tubers and nuts in the raw form. Some pulses and cereals are also eaten as raw food.

Question 4.
How to make Salad?
Answer:
Collect some raw food items available in our locality. Clean them with fresh water, cut them into small pieces (keep the nuts whole), put them in a bowl then add salt, spices and mix it well. Now, our tasty salad is ready.

Question 5.
Why should we cook food?
Answer:

• Cooked food is digested easily.
• Cooking softens the food materials.
• Cooking kills germs.
• Cooking adds taste and flavour to food.

VI. Answer in detail :

Question 1.
List out the benefits of clay pot cooking.
Answer:

• Easy to digest.
• Preserves the nutrients. m Needs less oil for cooking.
• Adds flavour to the dish.
• Keeps the food warm for a long time.
• Keeps the food from becoming stale soon.
• Alkaline property in the pot neutralizes the acidic property in the food.

Question 2.
What are the hygienic ways of taking food ?
Answer:

• Always cover food to protect them from dust and insects.
• Eat fresh food always.
• Avoid taking food that is too cold or too hot.
• Avoid fast food and fried food.
• Always wash your hands with soap before and after eating.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 1 Chapter 4 Science in Everyday life Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 1 Chapter 4 Science in Everyday life

Samacheer Kalvi 4th Science Guide Science in Everyday life Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
Primary source of energy for the young ones of some animals is
(a) Water
(b) Fruits
(c) Milk
Answer:
(c) Milk

Question 2.
Vitamin present in milk that helps us to maintain our bones is
(a) Vitamin-E
(b) Vitamin-C
(c) Vitamin-D
Answer:
(b) Vitamin-C

Question 3.
One of the ancient food items made by human is
(a) Noodles
(b) Cake
(c) Bread
Answer:
(c) Bread

Question 4.
_____________ is a raw food.
(a) Cucumber
(b) Chappatti
(c) Bread
Answer:
(a) Cucumber

Question 5.
A gadget that plays songs is called
(a) Pen drive
(b) Camera
(c) Music player
Answer:
(c) Music player

II. Fill in the blanks :

1. Cheese and paneer are made from _____________.
Answer:
Milk

Question 2.
Nutrients are made ready for digestion by ____________.
Answer:
Cooking

III. Match the following :

Question 1.

Answer:

IV. Answer in a sentence or two :

Question 1.
Name the food products derived from milk.
Answer:
Milk gives curd, butter, butter milk and ghee, cheese, paneer, milk sweets, ice cream and chocolates. ”

Question 2.
Write the names of any three baked foods.
Answer:
Bread, biscuit and cakes are the baked foods.

Question 3.
In what ways a smart phone will help you?
Answer:
Smart phone helps us to communicate, access the internet, store files, take photos and track locations.

Question 4.
What is food?
Answer:

• Food is one of the basic needs of life. Food provides energy and it contains essential nutrients to keep our body healthy.
• It is usually made by cooking plants and animals.

V. Answer in detail :

Question 1.
Cooking removes harmful microbes. Write down other benefits of cooking.
Answer:

• Cooking causes many useful changes in food.
• It makes nutrients ready for digestion.
• It helps to make food in the desired texture, flavour and taste,
• It destroys harmful microbes.

Question 2.
Why should we drink milk?
Answer:
Following are the benefits of milk.

• It strengthens bones and teeth.
• It maintains blood pressure.
• It reduces the risk of heart disease.
• It is a source of energy.

VI. Projects :

Question 1.
List the gadgets you have used.
Answer:
Some of the electronic gadgets used are;

• Laptop
• Mobile phones
• Camera
• Speaker
• Tablets
• Computers
• Electric torch
• Pen drive
• Remote
• Television

Question 2.
Tabulate different kinds of milk products.
Answer:

• Butter
• Cheese
• Yogurt
• Frozen desserts
• Milk chocolates
• Milk sweets
• Paneer

Try to Answer (Text Book Page No. 115)

Question 1.
Milk is a rich source of __________ (Calcium / Iron)
Answer:
Calcium

Question 2.
Milk contains _____________ , __________ , and ___________
Answer:
prof In, fat, vitamin D

Try to Answer (Text Book Page No. 117)

Question 1.
_____________ , ____________ are examples of raw food.
Answer:
Carrot, Cucumber

Question 2.
_____________ , ____________ are examples of cooked food.
Answer:
vegetable curry, bread

Try to Answer (Text Book Page No. 119)

Question 1.
Bread is ___________ (low / high) fat food.
Answer:
low

Question 2.
Biscuits are made from _____________ (wheat flour / rice flour).
Answer:
wheat flour

Question .3.
____________ is associated with birthday celebrations (cake / biscuit).
Answer:
cake

Samacheer Kalvi 4th Science Guide Science in Everyday life InText Questions and Answers

Try to Answer (Text Book Page No. 121)

Question 1.

Answer:

Samacheer Kalvi 4th Science Guide Science in Everyday life Additional Questions and Answers

I. Pick out the odd one :

Question 1.
butter, curd, sugar, milk.
Answer:
Suger

Question 2.
fruits, carrot, ground nuts, rice.
Answer:
Rice

Question 3.
chocolate, bread, biscuit, cake.
Answer:
Chocolate

Question 4.
cutting, boiling, steaming, frying.
Answer:
Cutting

Question 5.
Laptop, T.V., Smart phone, Milk.
Answer:
T.V.

II. Say true or false :

Question 1.
Calcium helps to build healthy bones and teeth
Answer:
True

Question 2.
Bread is an example of baked food items.
Answer:
True

Question 3.
Yeast is used to make biscuits.
Answer:
False

Question 4.
Biscuit is a baked food
Answer:
True

Question 5.
Tablets used to read books
Answer:
True

Question 6.
Pen drive is not a gadget
Answer:
False

III. Match the following :
Question 1.

Answer:

1.  (c)
2.  (a)
3.  (d)
4.  (b)

Question 2.

Answer:

1.  (b)
2.  (a)
3.  (d)
4.  (c)

IV. Choose the correct answer :

Question 1.
Milk has _____________ taste.
(a) Sweet
(b) Sour
(c) Bitter
(d) Tasteless
Answer:
(a) Sweet

Question 2.
Milk has a special sugar called
(a) Lactose
(b) Glucose
(c) Fructose
(d) Galactose
Answer:
(a) lactose

Question 3.
___________ in milk helps to maintain the bones.
(a) Vitamin-D
(b) Vitamin-C
(c) Vitamin-A
(d) Vitamin-B
Answer:
(a) Vitamin-D

Question 4.
Bread spoils ______________ faster when kept in fridge.
(a) 6 times
(b) 2 times
(c) 4 times
(d) None of the above
Answer:

(a) 6 times

IV. Fill in the blanks :

Question 1.
Milk helps to build _____________.
Answer:
Muscles

Question 2.
Fat present in the milk is called ____________.
Answer:
Butter

VI. Answer the following questions in one or two sentences :

Question 1.
What are the sources of milk?
Answer:
Milk is primarily obtained from mammals. They are obtained from other sources too.
Examples: Soya milk, nut and seed based milk.

Question 2.
Write 4 health benefits of milk.
Answer:

• It strengthens bones and teeth.
• It maintains blood pressure.
• It reduces the risk of heart disease.
• It is a source of energy.

Question 3.
What are the main ingredients of biscuit?
Answer:
The main ingredients of biscuit are flour, sugar, butter, water, milk, baking powder and flavours.

Question 4.
What is the use of pen drive?
Answer:
It is a small gadget used for storing and transferring any type of file in / from a computer.

Question 5.
Write the classification of milk.
Answer:
Based on the amount of fat present in the milk, it can be classified as Whole milk, Low fat milk and Fat free milk.

Question 6.
What is meant by raw food?
Answer:
Raw food is the food that does not have to be cooked to eat.
Examples: Fruits, carrot, ground nut seeds.

Question 7.
What is a gadget?
Answer:
A gadget is a small electronic machine or device which does something useful. They make our life enjoyable.
Examples: Laptop, Phone.

Question 8.
What is the use of the portable music player?
Answer:
It stores and plays thousands of songs. We can listen to songs anywhere, anytime.

VII. Answer the detail :

Question 1.
Write a note on Bread.
Answer:

• Bread is a common food product prepared from dough by baking. It is an important source of energy for sick people. It is also one of the ancient foods made by humans. Bread is a low fat food.
• Bread has the nutrients required for normal development and good health.
• To make bread we need wheat flour, yeast, water, sugar and salt.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 1 Chapter 3 Work and Energy Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 1 Chapter 3 Work and Energy

Samacheer Kalvi 4th Science Guide Work and Energy Text Book Back Questions and Answers

I. Use the correct word to fill the blanks :

(Ramp, Simple machines, Work, Energy, Pulley)

1. ___________ is said to be done when a force is acting on it.
Answer:
Work

Question 2.
The ability to do work is __________.
Answer:
Energy

Question 3.
___________ is a machine made up of wheel and rope.
Answer:
Pulley

Question 4.
____________ help us to make work easier.
Answer:
Simple machines

Question 5.
An example for inclined plane is ____________.
Answer:
Ramp

II. Rearrange the letters and find out the names of the tools :

Question 1.

Answer:

Question 2.

Answer:

Question 3.

Answer:

III. Match the following :

Question 1.

Answer:

IV. Classify the things below : (Text Book Page No. 109)

Question 1.

Answer:

V. Answer the following :

Question 1.
What is the unit of energy?
Answer:
The S.I. Unit of energy is the joule.

Question 2.
Name some simple machines.
Answer:
Simple machines are pulley, wedge, inclined plane, screw, lever, wheel and axle.

Question 3.
What is a first order lever?
Answer:
When the fulcrum is between the effort and the load, it is known as Class I lever.
Example: scissors, pliers, seesaw.

Question 4.
Lemon juicer belongs to which type of lever? Why?
Answer:
Lemon juicer belongs to Class II Lever. In a lemon squeezer, the lemon (load) is at the middle, the load is at the center of effort and fulcrum.

Question 5.
Define work.
Answer:
An action in which one exerts a force to move an object is known as work.

Question 6.
Write any three types of energy.
Answer:

• Mechanical energy.
• Thermal energy.
• Chemical energy.

Samacheer Kalvi 4th Science Guide Work and Energy In Text Questions and Answers

Try to Answer (Text Book Page No. 104)

Observe the picture and put a tick ✓) if work is done and put a cross (x) if work is not done.
Question 1.

Answer:

Let us do (Text Book Page No. 104)

Mention whether work is done or not in the following activity.
Question 1.

Answer:

Try to Answer (Text Book Page No. 109)

Identify and mention the types of simple machines.
Question 1.

Answer:

Let us do (Text Book Page No. 109)

Complete the table.
Question 1.

Answer:

Try to Answer (Text Book Page No. 111)

Name the load, effort and fulcrum.
Question 1.

Answer:

Samacheer Kalvi 4th Science Guide Work and Energy Additional Questions and Answers

I. Pick out the odd one :

Question 1.
Mechanical energy, Heat energy, Chemical energy, Food
Answer:
Food

Question 2.
Scissors, broomstick, wrench, sea saw
Answer:
Broomstick

Question 3.
petrol, coal, natural gas, water.
Answer:
Water

II. Say true or false :

Question 1.
Chemical energy is one of the types of lever.
Answer:
False

Question 2.
Simple machines usually exchange a larger force to move a heavy object.
Answer:
False

Question 3.
The idea of a simple machine originated with the Greek philosopher Archimedes.
Answer:
True

Question 4.
A lever is used to multiply the force.
Answer:
True

III. Match the following :

Question 1.

Answer:

1. – (b)
2. – (a)
3. – (d)
4. – (c)

IV. Choose the correct answer :

Question 1.
second order lever ___________.
(a) Scissors
(b) lemon squeezer
(c) Tongs
Answer:
(b) lemon squeezer

Question 2.
Which of the following device converts chemical energy into electrical energy?
(a) Battery
(b) Loud speaker
(c) Solar cell
(d) Electric motor
Answer:
(q) Battery

Question 3.
Which among the following is the non-renewable resources?
(a) Sun
(b) Wind
(c) Water
(d) Petrol
Answer:
(d) Petrol

Question 4.
SI unit of energy is ______________.
(a) Joule
(b) kilogram
(c) Mass
(d) Watt
Answer:
(a) Joule

Question 5.
A is a push or a pull
(a)Force
(b)Friction
(c) Simple machine
(d) pulley
Answer:
(b) Friction

Question 6.
Simple machines makes work easier by trading _____________ for force.
(a) Motion
(b) Work
(c) Friction
(d) Distance
Answer:
(b) Work

Question 7.
A force can cause an object to change its
(a) Shape
(b) Speed
(c) Direction
(d) All the above
Answer:
(d) All the above

V. Fill in the blanks :

Question 1.
A ___________ should act on an object.
Answer:
Water

Question 2.
A pulley is a machine made up of a _____________.
Answer:
Wheel

Question 3.
_____________ is used to split materials.
Answer:
Wedge

Question 4.
The screw is used to raise _____________.
Answer:
Weights

Question 5.
The _____________ and sharpener are held together by screw.
Answer:
Blade

VI. Answer the following questions in one or two sentences :

Question 1.
What is non-renewable resources?
Answer:
The resources which are not easily replaced once used are called the non renewable resources.
Example: Petrol, Coal and Natural gas.

Question 2.
Write about Renewable resources.
Answer:

• Renewable sources of energy are replaced naturally over a period of time.
• We can keep using these sources for a long period of time. Since the beginning of human life, we have been using these resources.
• We use these resources for light, transport, cooking, heating. Eg: Sun, Wind and Water.

Question 3.
Write the two main conditions are needed for work to be done?
Answer:
Two main conditions are needed for work to be done.

1. A force should act on an object.
2. Object should move from one place to another.

Question 4.
What is work?
Answer:
An action in which one exerts a force to move an object is known as work.

Question 5.
Define energy?
Answer:

• Energy is defined as capacity for doing work.
• Energy must be transferred to an object in order to do work.

Question 6.
Write the type of energy.
Answer:

• Mechanical energy.
• Thermal energy
• Chemical energy
• Electrical energy
• Non-renewable energy
• Renewable energy

Question 7.
What is simple machine?
Answer:

• Simple machines are tools which are used to make our work easier.
• Some examples for simple machines are pulley, wedge, inclined plane,

Question 8.
Differentiate Class I lever and Class II lever.
Answer:

Class I lever	Class II lever
1. When the fulcrum is between the effort and the load, it is known as Class I lever.	When the load is between the effort and the fulcrum, it is known as Class II lever.
2. Example: scissors, pliers, seesaw.	Example: wheel barrow, lemon squeezer, nut cracker.

 

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Science Guide Pdf Term 1 Chapter 1 My body Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Science Solutions Term 1 Chapter 1 My body

Samacheer Kalvi 4th Science Guide My Body Text Book Back Questions and Answers

I. Pick out the odd one :

Question 1.
1. Heart
2. Legs
3. Brain
4. Kidney
Answer:
2. Legs

Question 2.
1. Eyes
2. Ears
3. Fingers
4. Lungs
Answer:
4. Lungs

Question 3.
1. Fore brain
2. Mid brain
3. Hind brain
4. Nerves
Answer:
4. Nerves

II. Complete the figure with words given in the bracket :

(Kissing on the mouth, Grand parents’ love, Hitting the buttocks, Pat of dad on head, Parent’s hug and kisses, Showing awkward pictures)

Question 1.

Answer:

III. Find the answers from the following clues and circle the words (First one is done for you)

Question 1.
1. An internal organ.
2. Organ that helps us to breath.
3. An organ removing wastes from our body,
4. Unfair and unhealthy touch.
5. Everyday we should drink more ___________ .

Answer:

1. Heart
2. Lungs
3. Kidney
4. Bad Touch
5. Water

IV. Say true or false :

Question 1.
Head, hand and legs are internal organs.
Answer:
False

Question 2.
Heart is made up of muscles.
Answer:
True

Question 3.
Muscles are the soft parts that cover our bones.
Answer:
True

Question 4.
Brush your teeth once a day.
Answer:
False

Question 5.
Father patting you on your head is a good touch.
Answer:
True

V. Choose the correct answer :

Question 1.
____________ is the commanding centre of our body.
(a) Heart
(b) Lungs
(c) Kidney
(d) Brain
Answer:
(d) Brain

Question 2.
Food is converted to energy in the _____________.
(a) Neck
(b) Heart
(c) Stomach
(d) Nose
Answer:
(c) Stomach

Question 3.
Every day we should brush our teeth __________ times.
(a) One
(b) Two
(c) Three
(d) Four
Answer:
(b) Two

Question 4.
Good touch is a fair and ___________ touch.
(a) Unhealthy
(b) Bad
(c) Unsafe
(d) Healthy
Answer:
(d) Healthy

Question 5.
Drink a lot of every day.
(a) Oil
(b) Water
(c) Packed juice
(d) Salt water
Answer:
(b) Water

VI. Answer the following questions in one or two sentences :

Question 1.
Name the internal organs.
Answer:
Some body parts such as stomach, lungs and heart that are inside our body, these parts are called internal organs.

Question 2.
What are the functions of brain?
Answer:
Brain is the commanding centre of our body.

• It controls all activities of our body like moving our hands and legs sitting or walking.
• It helps us to think and perform various actions.

Question 3.
List out the food items for healthy mouth and teeth.
Answer:

• Drink water or milk instead of sugar juices.
• Take plenty of fruits, vegetables and dairy products.
• Eat candy, cake and ice cream as less as possible.

Question 4.
How will you take care of your heart and kidney?
Answer:

• For healthy Heart – Stay away from processed food. Choose fresh fruit and vegetable.
• For healthy Kidney – Drink plenty of fluid (water & Juice).

Question 5.
What do you do when some one touches you and you feel uncomfortable?
Answer:

• Say “Don’t touch” in a loud voice.
• Leave the spot quickly.
• Tell elders like your parents or teachers till you get help.

VII. Think and answer :

Question 1.
When an unknown person disturbs you, how do you behave? Write in your own words.

• I must never be afraid, to shout and say, Don’t touch me”.
• Must leave the spot quickly.
• Must tell elders like father or mother or teacher to get help.

Question 2.
Which organ controls thinking, speaking and learning. Write its three important parts.
Answer:
The organ that controls thinking,speaking and learning is ‘Brain’.
The three important parts of Brain are

1. Fore brain
2. Mid brain
3. Hind brain

Samacheer Kalvi 4th Science Guide My Body InText Questions and Answers

Let us Recall (Text Book Page No. 82)

Question 1.
There are some body parts hidden in the table below. Can you spot them?

Answer:

1. Hear
2. Nose
3. Ears
4. Leg
5. Hand

Try to Answer (Text Book Page No. 83)

Question 1.
______ (Nose / Brain) is an internal organ.
Answer:
Rain

Question 2.
We can see the internal body parts (True / False).
Answer:
False

Try to Answer (Text Book Page No. 86)

Match the following :

Question 1.

Answer:

1. – e
2. – a
3. – b
4. – c
5. – d

Try to Answer (Text Book Page No. 89)

Tick (✓) the foods that are good for your teeth and cross (✗) the food that are bad for your teeth.

Question 1.

Answer:

Try to Answer (Text Book Page No. 90)

Question 1.
Is it Good touch or Bad touch? Why?

Answer:
(A) Bad touch – It is the kind you don’t like and want it to stop.
(B) Good touch – It is a way for people to show they care and help for each other.

Try to Answer (Text Book Page No. 92)

Look at the picture and write ‘Good touch’ or ‘Bad touch’.
Question 1.

Answer:

Samacheer Kalvi 4th Science Guide My body Additional Questions and Answers

Question 1.
fore brain, mid brain, hind brain, centre brain
Answer:
Center brain

Question 2.
spongy, J-shaped, contract, expand
Answer:
J-shaped

Question 3.
bean shaped, purify blood, filtering, breath in
Answer:
Bean shaped

Write True or False :

Question 1.
Brain is protected by skull.
Answer:
True

Question 2.
We have three kidneys.
Answer:
False

Question 3.
Lungs help us to breath.
Answer:
True

Question 4.
When we breath in, the lungs become bigger.
Answer:
True

Question 5.
We breath out, we give out oxygen from the lungs.
Answer:
False

Question 6.
Lungs pumps blood to all parts of the body.
Answer:
False

Match the following :

Question 1.

Answer:
1. – b
2. – a
3. – d
4. – c

Fill the blanks :

Question 1.
When we breath out, we give out __________ from the lungs.
(a) Carbon dioxide
(b) Oxygen
(c) Nitrogen
(d) Hydrogen
Answer:
(a) Carbon dioxide

Question 2.
The heart beat about __________ in a minute.
a) 71 times
b) 72 times
c) 62 times
d) 60 times
Answer:
(b) 72 times

Question 3.
How many kidneys does the human body have?
(a) 2
(b) 1
(c) 3
(d) 4
Answer:
(a) 2

Question 4.
How many bones are there in an adult human being?
(a) 210
(b) 260
(c) 206
(d) 201
Answer:
(c) 206

Question 5.
The main function of the kidney is
(a) To control blood pressure
(b) To control body temperature
(c) To remove waste product from the body
(d) To help in digestion of food.
Answer:
(c) To remove waste product from the body

Question 6.
How many bone are there is a newly born infant
(a) 206
(b) 230
(c) 280
(d) 300
Answer:
(d) 300

Question 7.
Which is the largest organ in the human body?
(a) Liver
(b) Heart
(c) Skin
(d) Kidney
Answer:
(c) Skin

V. Fill in the blanks.

Question 1.
Stomach is a __________ bag found below the lungs.
Answer:
J-shaped

Question 2.
Heart is made up of _________.
Answer:
Muscles

Question 3.
Stomach contains special juice to breakdown ___________ into energy.
Answer:
Food

Question 4.
The kidneys purify __________.
Answer:
Blood

VI. Answer the following questions in one r two sentences :

Question 1.
Draw a human heart and colour the picture.
Answer:

Question 2.
What happens to the lungs when we breathe in?
Answer:

• When we breath in, we take in oxygen from air through the nose and pass it to the lungs.
• The lungs expands (becomes big) in the position.

Question 3.
What is milk teeth?
Answer:

• The first set of teeth starts to develop from the age of six months.
• They are called milk teeth and they are 20 in number.

Question 4.
Name the four types of the permanent teeth.
Answer:
There are four types of teeth: Incisors, Canines, Premolars and Molars.

Question 5.
How do you take care of your mouth and teeth?
Answer:

• Change toothbrush once in every three months.
• Avoid sticky food.
• Brush twice a day. (After getting up and before going to bed)
• Rinse your mouth with water every time after you eat.

Question 6.
List out the activities related to bad touch.
Answer:

• Touching the buttocks and other private parts.
• Hitting, slapping, spitting, pushing or punching, kissing.
• Activities that make you feel scared or nervous or ashamed.
• Dirty talk and dirty pictures.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Social Science Guide Pdf Term 3 Chapter 3 Rights and duties of children Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Social Science Solutions Term 3 Chapter 3 Rights and duties of children

Samacheer Kalvi 4th Social Science Guide Rights and duties of children Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
This is against Indian law __________.
(a) Children studying in school.
(b) Children below 14 years working in industries.
(c) Children participating in school activities.
(d) Children getting nutritious food.
Answer:
(b) Children below 14 years working in industries.

Question 2.
Polio drops are given to ____________
(a) Men
(b) Women
(c) Children
(d) Senior citizens
Answer:
(c) Children

Question 3.
A set of rules of a country is known as the _____________ .
(a) Story book
(b) Rule book
(c) Constitution
(d) Textbook
Answer:
(c) Constitution

Question 4.
Which of the following is not a right of children?
(a) Getting driving license
(b) Getting education
(c) Getting adequate food
(d) Living in a healthy manner
Answer:
(a) Getting driving license

II. Write True or False :

Question 1.
The child has the basic right to get polio drops.
Answer:
True

Question 2.
There are same rights for all age groups of children.
Answer:
False

Question 3.
All children of age 6-14 years should be employed.
Answer:
False

Question 4.
Hitting children is wrong.
Answer:
True

Question 5.
Children should be aware of bad touch.
Answer:
True

II. Match the Following :

Question 1.

Answer:

IV. Answer the following questions :

Question:1.
What are the three parts on your body where no one should touch?
Answer:
Lips, chest and between my legs.

Question 2.
What are the different rights you have as a child?
Answer:
The four major child rights are:

1. Right to survival ‘
2. Right to development
3. Right to protection
4. Right to participation

Question 3.
Write short note on right to survival.
Answer:

• It is to ensure every child has access to minimum standards of food.
• This helps in healthy growth in all children.
• There are different rights for children below the age of 6’and between the age of 6-14 years.
• This is because both the age groups have different needs for their

Question 4.
Have you ever used your right to participate? Describe.
Answer:
Children have the right to participate in matters related to them. This includes asking questions, giving suggestions and making decisions in things that affect them.

Question 5.
Why are rights important?
Answer:
1. Human rights also guarantee people the means necessary to satisfy their basic needs such as food, housing and education, so they can take full advantage of all opporunities.

2. Finally, by guaranteeing life, liberty, equality and security. Human rights protects people against abuse by those who are more powerful.

Samacheer Kalvi 4th Social Science Guide Rights and duties of children

Text Book Back Additional Questions and Answers

I. Choose the correct answer:

Question 1.
___________ is to ensure every child has access to minimum standards of food.
(a) Right to survival
(b) Right to development
(c) Right to protection
(d) Right to participation
Answer:
(a) Right to survival

Question 2.
There are many diseases that spread through ____________ .
(a) air
(b) Land
(c) Water
(d) None
Answer:
(c) Water

Question 3.
All children ___________ years have the right to go to school.
(a) Below 14
(b) After 14
(c) Below 16
(d) After 15
Answer:
(a) Below 14

Question 4.
Children have the ___________ in all circumstances.
(a) Right to participation
(b) Right to development
(c) Right to be protected
(d) Right to survival
Answer:
(c) Right to be protected

II. Fill in the blanks:

Question 1.
__________ is the lengthiest constitution of the world.
Answer:
The Indian constitution

Question 2.
The __________ is responsible to providing free education to all.
Answer:
Government

Question 3.
___________ is illegal to force children below the age of 14 to work.
Answer:
Child labour

III. Write True or False :

Question 1.
Right to survival helps in healthy growth in all children.
Answer:
True

Question 2.
Every child has the right to go to school and develop life skills.
Answer:
True

Question 3.
Children have does not any rights.
Answer:
False

Question 4.
Children have the right to be protected against danger.
Answer:
True

IV. Match the following :

Question 1.

Answer:

1. – e
2. – d
3. – a
4. – b
5. – c

V. Answer the following questions :

Question 1.
What do you mean by citizen?
Answer:

• Citizen is a person who is a member of a country.
• A citizen enjoys the rights given to him/her by the country.

Question 2.
Who sets rules for citizens?
Answer:
The constitution of India sets rules.

Question 3.
Does constitution make citizens responsible?
Answer:
Yes, it helps all people to be a responsible citizen of our country.

Question 4.
What else is a part of rights to survival?
Answer:
The WASH programme is also a part of rights to survival.

Question 5.
What do you mean by WASH?

Answer:

• WASH stands for Water, Sanitation and Hygiene.
• It means there should be access to clean water for drinking and other needs.
• There are many diseases that spread through water.
• To avoid these, having access to safe water is very important.

Question 6.
Write a short note on Right to Development.
Answer:
Every child has the right to go to school and develop life skills.

Question 7.
What do you mean by child labour?
Answer:
Children are involved in different works at different places. This is called Child Labour.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Social Science Guide Pdf Term 3 Chapter 2 The story of madras presidency Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Social Science Solutions Term 3 Chapter 2 The story of madras presidency

Samacheer Kalvi 4th Social Science Guide The story of madras presidency Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
Madras Presidency was formed in _____________ .
(a) 1800
(b) 1801
(c) 1802
(d) 1803
Answer:
(b) 1801

Question 2.
Madras Presidency was officially renamed as Tamil Nadu in _____________.
(a) 1947
(b) 1953
(c) 1956
(d) 1969
Answer:
(d) 1969

Question 3.
Mamallapuram was created by the _____________ .
(a) Nayak dynasty
(b) Pallava dynasty
(c) Cholas
(d) British
Answer:
(b) Pallava dynasty

Question 4.
Which is called as the “Spa of the South India”?
(a) Bodinayakanur
(b) Hogenakkal
(c) Courtallam
(d) Gingee Fort
Answer:
(c) Courtallam

Question 5.
Manora is known for the eight storied miniature fortress built by ___________ .
(a) Rajah Serfoji
(b) Chinna Bommi Nayak
(c) Thimma Reddy Nayak
(d) Thirumalai Nayakkar
Answer:
(a) Rajah Serfoji

II. Write True or False :

Question 1.
The city of Madras was the capital of the Madras Presidency.
Answer:
True

Question 2.
Uthiramerur an ancient Chola village, is located in Salem District
Answer:
False

Question 3.
Thirumalai Nayakkar Palace was built by Thirumalai Nayakkar.
Answer:
True

Question 4.
Coimbatore is called as “The Manchester of South India”.
Answer:
True

Question 5.
Gangaikonda Cholapuram temple is popularly known as Thanjai Periya Koil.
Answer:
False

III. Match the following :

Question 1.

Answer:

IV. Answer the following questions :

Question 1.
What is the significance of the Gingee Fort?
Answer:

• Gingee Fort also called as Senji Fort is one of the beautiful forts in Tamil Nadu.
• This fortress is built across three hillocks in Villupuram district.
• The British called this fort as “Troy of the East”.

Question 2.
What were the main features of the Thirumalai Nayakkar Palace?
Answer:

• Thirumalai Nayakkar Palace, built by Thirumalai Nayakkar, located in the district of Madurai.
• It is classic fusion of Dravidian and Islamic architecture.

Question 3.
Name some of the tourist places in Salem district.
Answer:

1. Mettur Dam
2. Yercaud
3. Kailasanathar Temple
4. Sankagiri Fort

Question 4.
Write a short note on Kallanai.
Answer:
Kallanai is an ancient dam built across the River Cauvery in South India. This dam was constructed in 2nd century AD(CE) by the Chola King Karikalan.

Question 5.
Write a short note on Rock fort.
Answer:

• Tiruchirappalli Rockfort is a temple built on an ancient rock.
• It is constructed on a rock that is 83 meters tall.
• There are two Hindu temples inside the fort.

Question 6.
Name some of the tourist places in Tamil Nadu.
Answer:

1.  Marina Beach
2.  Mahabalipuram
3.  Vellore fort
4.  Pulicat lake
5.  Hogenakkal waer falls
6.  Ooty, Kodikanal
7.  Yercarud
8.  Kolli Hills

Samacheer Kalvi 4th Social Science Guide The story of madras presidency Text Book Back Additional Questions and Answers

I. Choose the correct answer :

Question 1.
In 1862, the Madras Province was divided into _________ districts.
(a) 20
(b) 22
(c) 28
(d) 30
Answer:
(b) 22

Question 2.
Mamallapuram was created by the __________ Dynasty.
(a) Pallava
(b) Chera
(c) Chola
(d) Pandiya
Answer:
(a) Pallava

Question 3.
Vellore Fort is an ancient fort built in ____________.
(a) 1565
(b) 1566
(c) 1568
(d) 1569
Answer:
(b) 1566

Question 4.
Gingee Fort also called as _____________.
(a) Senji Fort
(b) Vellore Fort
(c) St.George Fort
(d) rock Fort
Answer:
(a) Senji Fort

Question 5.
Anaimalai wildlife sanctuary is located in the __________ district.
(a) Salem
(b) Coimbatore
(c) Erode
(d) Madurai
Answer:
(b) Coimbatore

Question 6.
Keeladi is located on the ___________ district.
(a) Madurai
(b) Salem
(c) Sivagangai
(d) Villupuram
Answer:
(c) Sivagangai

Question 7.
Courtallam is located on the __________ Ghats.
(a) Eastern
(b) Western
(c) Nothern
(d) None of the above
Answer:
(b) Western

II. Fill in the blanks :

Question 1.
__________ was an important province of British India.
Answer:
Madras presidency

Question 2.
The last British Governor of Madras Presidnency was __________ .
Answer:
Archibald Edward Nye

3. Uthiramerur, an ancient Chola village, is located in __________ district.
Answer:
Kancheepuram

Question 4.
The temple inscriptions of ___________ are notable for their historical descriptions of rural self – governance.
Answer:
Uthiramerur

Question 5.
___________ is the biggest observatory in Asia.
Answer:
Vainu Bappu Observatory

Question 6.
__________ is the highest peak in the Nilgiris.
Answer:
Doddabetta

III. Write True or False :

Question 1.
The first British Governor of Madras presidency was Edward dive.
Answer:
True

Question 2.
Mamallapuram has many rock sculptures and is declared by UNO.
Answer:
False

Question 3.
Auroville is an experimental township in Villupuram district.
Answer:
True

Question 4.
Mettur dam means an area surrounded by mountains.
Answer:
False

Question 5.
Thirumalai Nayakkar palace is classic fusion of Dravidian and Islamic architecture.
Answer:
True

Question 6.
Thoothukudi is called as the pearl city.
Answer:
True

IV. Match the Following :
Question 1.

Answer:

1. – e
2. – d
3. – a
4. – b
5. – c

V. Answer the following questions :

Question 1.
Write a short note on Madras Presidency.
Answer:

• Madras Presidency was formed in 1801.
• It was an important province of British India.
• It was also known as Madras Province and officially known as the Presidency of Fort St. George.
• It included areas of southern India, such as the states of Tamil Nadu, Kerala, Andhra Pradesh, Karnataka, parts of Odisha and the Union Territory of Lakshadweep.

Question 2.
Who was the first and last Governor of Madras presidency?
Answer:
The first British Governor of Madras Presidency was Edward Clive and the last Governor was Archibald Edward Nye.

Question 3.
Name the modern district of Madras.
Answer:
The modern districts of Chennai, Tiruvallur and Kancheepuram constituted the Madras district.

Question 4.
Write a short note on (i) Mamallapuram (ii) Uthiramerur.
Answer:

•  Mallapuram :
  Mamallapuram was created by the Pallava bynasty. It has many rock sculptures and is declared by UNESCO as a World Heritage site.
•  Uthiramerur :
  Uthiramerur, an ancient Chola village, is located in . Kancheepuram district. The temple inscriptions of Uthiramerur are
  notable for their historical descriptions of rural self-governance.

Question 5.
What do you mean by Salem?
Answer:
The name Salem is derived from the word “SAILAM”. It means an area surrounded by Mountains.

Question 6.
What are the features of Thanjavur district?
Answer:

• Thanjavur is popularly known as the Delta area and the “Rice Bowl of Tamil Nadu”.
• Manora Fort is located in the district of Tanjore.
• It is known for the eight-storied miniature fortress built by Rajah Serfoji.

Question 7.
Name some waterfalls in Tamil Nadu.
Answer:

• Hogenakkal Waterfalls
• Mayil Ootru Waterfalls
• Suruli Falls
• Courtallam
• Ayyanar Falls

Question 8.
What are the Modern state of Andhra Pradesh?
Answer:
The districts of Chittoor, Nellore, Cuddapah, a part of Anantapur, Guntur, Kurnool, Kistna, Godivari East, Godivari West, and Vizagapatanam are included in modern state of Andhra Pradesh.

Tamilnadu State Board New Syllabus Samacheer Kalvi 4th Social Science Guide Pdf Term 3 Chapter 1 Tamils around the world Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 4th Social Science Solutions Term 3 Chapter 1 Tamils around the world

Samacheer Kalvi 4th Social Science Guide Tamils around the world Text Book Back Questions and Answers

I. Choose the correct answer :

Question 1.
One of the official languages of Sri Lanka is _____________.
(a) Mandarin
(b) Hindi
(c) Tamil
(d) Sanskrit
Answer:
(c) Tamil

Question 2.
Modern Singapore was founded in ____________.
(a) 1819
(b) 1820
(c) 1947
(d) 1835
Answer:
(a) 1819

Question 3.
In ancient times, Kedah state in Malaysia connected with ____________ of Tamil Nadu by sea route.
(a) Visakhapatnam
(b) Nagapattinam
(c) Madurai
(d) Chennai
Answer:
Nagapattinam

Question 4.
Principal religion of Myanmar is ____________.
(a) Hinduism
(b) Jainism
(c) Buddhism
(d) Sikhism
Answer:
(c) Buddhism

Question 5.
In the year ____________ British captured Mauritius.
(a) 1810
(b) 1820
(c) 1910
(d) 1920
Answer:
(a) 1810

II. Match the Following :

Question 1.

Answer:

III. Write True or False :

Question 1.
Pallava and Cholas influenced Malaysia.
Answer:
True

Question 2.
Fiji is a group of volcanic islands in the South Pacific.
Answer:
True

Question 3.
King Kyansittha is the son of King Anawrahta Minsaw.
Answer:
True

Question 4.
The Reunion island is a part of the French Overseas Department.
Answer:
True

Question 5.
Tamils are living only in Tamil Nadu.
Answer:
False

IV. Answer the following questions.

Question 1.
Describe the past relations between Tamil Nadu and Malaysia.
Answer:

• The relations between Tamil Nadu and Malaysia have existed for more than 2000 years.
• In ancient times, Tamils’ ships reached the modern Malaysian state of Kedah (Kadaaram in Tamil).
• Tamils influenced the cultural and political nature of Malaysia at the time of Pallava and Cholas.

Question 2.
Write a note on Reunion island.
Answer:

• Reunion is an island located in the Indian Ocean, near Mauritius.
• It is a part of the French Overseas Department.

Question 3.
Name the countries in which Tamil is one of the official languages.
Answer:
Tamil is an official language in three countries namely India, Sri Lanka and Singapore

Question 4.
What were the contributions of Tamils in constructing the country Mauritius?
Answer:

• Many Tamils were brought from, in and around Puducherry from 1731 AD(CE).
• Generally, slaves who lived here were mere labourers but, Tamils went there as skilled labourers and artisans.
• The Tamils helped the French make this island suitable to live and to construct many buildings.

Question 5.
(a) Which is one of the biggest Hindu festivals in Malaysia?
(b) Who is the father of nation in Myanmar?
Answer:
(a) One of the biggest Hindu festivals in Malaysia is Thaipusam.
(b) King Anawrahta Minsaw was the founder of the Empire.

Samacheer Kalvi 4th Social Science Guide Tamils around the world Additional Questions and Answers

I. Choose the correct answer :

Question 1.
Ancient Tamil Nadu shared its boundary with the sea on ______ sides.
(a) Two
(b) Three
(c) Four
(d) Five
Answer:
(b) Three

Question 2.
______ is home to many Tamils.
(a) SriLanka
(b) Malaysia
(c) Singapore
(d) Myanmar
Answer:
(a) SriLanka

Question 3.
______ is a peninsula located in Southeast Asia.
(a) Singapore
(b) SriLanka
(c) Malaysia
(d) Mauritius
Answer:
(c) Malaysia

Question 4.
Mariamman temple was built in Singapore at ______.
(a) 1819
(b) 1828
(c) 1838
(d) 1848
Answer:
(b) 1828

Question 5.
______ is a group of volcanic islands.
(a) Fiji
(b) Myanmar
(c) Mauritius
(d) None
Answer:
(a) Fiji

Question 6.
temple is famous in Myanmar.
(a) Koneswaram
(b) Ananda
(c) Murugan
(d) Sivan
Answer:
(b) Ananda

II. Fill in the blanks :

Question 1.
____________ naval expedition helped to expand our trade and cultural relations the East.
Answer:
Rajendra Chola’s

Question 2.
_____________ temple has thousand pillars.
Answer:
Koneswaram

Question 3.
Tamil influenced the cultural and political nature of Malaysia at the time of ____________ and ____________ .
Answer:
Pallava, Cholas

Question 4.
Tamil is one of the ____________ languages in Malaysia
Answer:
Educational

Question 5.
This book was a Fijian version of the ancient Tamil book ______________ .
Answer:
Thirukkural

Question 6.
In 1850, people from Tamil Nadu moved here and worked in the ____________ fields.
Answer:
Agricultural

Question 7.
In the early days, Tamils worked in ____________ and _____________ plantations.
Answer:
Tea, sugarcane

III. True or False :

Question 1.
Tamil is also an official language of Sri Lanka.
Answer:
True

Question 2.
The Lord Murugan statue is the first tallest Hindu deity statue in the world.
Answer:
False

Question 3.
King Anawrahta Minsaw was the founder of Myanmar Empire.
Answer:
True

Question 4.
Reunion is an island located in the Arabian sea, near Mauritius.
Answer:
False

Question 5.
Tamils sailed to many nations as traders and warriors.
Answer:
True

IV. Match the following :
Question 1.

Answer:

1. – e
2. – d
3. – a
4. – b
5. – c

V.Answer in short :

Question 1.
Write a note on Sri Lanka.
Answer:

•  Sri Lanka is home to many Tamils.
• There are two groups of Tamils living there. The first group is of people living in Sri Lanka. These people are called Sri Lankan Tamils.
• The other is group of Tamils who moved from India to Sri Lanka. They are called Indian Tamils.

Question 2.
What are the features of koneswaram temple?

Answer:
Koneswaram temple has thousand pillars. It is considered one of the richest and most visited temples in Asia.

Question 3.
Write a short note on Batu caves.
Answer:

• Batu Caves is a limestone hill, which has a series of caves and cave temple located at Gombak district in Malaysia.
• The Lord Murugan statue at the foot of Batu Caves is the second tallest Hindu deity statue in the world.

Question 4.
Write the features of Mariamman temple.
Answer:

• In 1828, a Mariamman temple was built in Singapore.
• It was built in Dravidian style by the Tamils.
• This is gazetted as a National Monument of Singapore.

Question 5.
(a) Who is launched by Thirukurali?
(b) Which temple located in Fiji?
Answer:
(a) Thirukurali was launched by Ratu Joni.
(b) The Siva Subramaniya temple is a Hindu temple located in Nadi, Fiji.

Question 6.
What are the features of Ananda temple?
Answer:

• Ananda temple is famous in Myanmar.
• This temple’s tower is made in Dravidian style.
• The upper part of the tower being made in North Indian style of architecture.