Category: Class 6

Students can download 6th Science Term 2 Chapter 2 Electricity Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 2 Chapter 2 Electricity

Samacheer Kalvi 6th Science Electricity Text Book Back Questions and Answers

I. Choose the correct answer:

Question 1.
The device which converts chemical energy into electrical energy is
(a) fan
(b) solar cell
(c) cell
(d) television
Answer:
(c) cell

Question 2.
Electricity is produced in
(a) transformer
(b) power station
(c) electric wire
(d) television
Answer:
(b) power station

Question 3.
Choose the symbol for battery

Answer:

Question 4.
In which among the following circuits does the bulb glow?

Answer:

Question 5.
_______ is a good conductor
(a) silver
(c) rubber
(b) wood
(d) plastic
Answer:
(a) silver

II. Fill in the Blanks

1. ………. are the materials which allow electric current to pass through them.
2. Flow of electricity through a closed circuit is …………
3. ……… is the device used to close or open an electric circuit.
4. The long perpendicular line in the electrical symbol represents its ………… terminal.
5. The combination of two or more cells is called a ………..

Answer:

1. Conductors
2. electric current
3. Key
4. positive
5. battery

III. True or False. If False, give the correct answer.

1. In a parallel circuit, the electricity has more than one path.
2. To make a battery of two cells, the negative terminal of one cell is connected to the negative terminal of the other cell.
3. The switch is used to close or open an electric circuit.
4. Pure water is a good conductor of electricity.
5. Secondary cell can be used only once.

Answer:

1. True
2. False – The negative terminal of one cell is connected to positive terminal of other cell.
3. True
4. False – Pure water is an insulator.
5. False – Secondary cells can be used many times.

IV. Match the following

Answer:
1. – Battery
2. – Bulb does not glow
3. – Open key
4. – Bulb glows
5. – Cell

V. Arrange in Sequence

Answer:
A DEVICE THAT CONVERTS CHEMICAL ENERGY INTO ELECTRICAL ENERGY IS CALLED A CELL.

VI. Give Very Short Answers

Question 1.
In the given circuit diagram, which of the given switches) should be closed. So that only the bulb A glows.

Answer:
K₁ and K₂ should be connected to glow bulb A in the circuit

Question 2.
Assertion (A) : It is very easy for our body to receive electric shock.
Reason (R) : Human body is a good conductor of electricity.
a. Both A and R are correct and R is the correct explanation for A.
b. A is correct, but R is not the correct explanation for A.
c. A is wrong but R is correct.
d. Both A and R are correct and R is not the correct explanation for A.
Answer:
(a) Both A and R are correct and R is the correct explanation for A.

Question 3.
Can you produce electricity from a lemon?
Answer:

1. We can produce electricity from the lemon.
2. Take lemon as an electrolyte, copper plate as positive terminal, and small hairpin as the negative terminal. This setup will work as a cell.
3. If we connect the electric bulb with it bulb will glow.

Question 4.
Identify the conductor from the following figures.

Answer:
Metallic chain is a conductor.

Question 5.
What type of circuit is there in a torchlight?
Answer:
Simple circuit system is used in a torchlight.

Question 6.
Circle the odd one out. Give a reason for your choice.
Answer:
Switch, Bulb, Battery, Generator.
Generator is the source of electricity. Others are parts of a circuit.

VII. Give Short Answers:

Question 1.
Draw the circuit diagram for the series connection.
Answer:

Question 2.
Can the cell used in the clock give us an electric shock? Justify your answer.
Answer:

1. The cell used in the clock will not give us an electric shock because the voltage of that cell is very low nearly 1.5 v.
2. So it will not affect our body.

Question 3.
Silver is a good conductor but it is not preferred for making electric wires. Why?
Answer:

1. Silver is a costly metal.
2. So economically we can not use it in electric wires.

VIII. Answer in detail:

Question 1.
What is the source of electricity? Explain the various power stations in India.
Answer:

1. In thermal power stations, thermal energy is generated by burning coal, diesel, or gas to produce steam.
2. Steam is used to rotate the turbine to generate electricity.
3. Here heat energy is converted into electric energy.

Hydel power stations:

1. In hydel power stations, the turbine is made to rotate by the flow of water from dams.
2. Here kinetic energy is converted into electric energy.

Atomic power station:

1. Here nuclear energy is used to boil water
2. The steam thus produced is used to rotate the turbine, as a result, electricity is produced.
3. Here nuclear energy is converted into mechanical energy.

Windmills:

1. In windmills, wind energy is used to rotate turbines to produce electricity.
2. Here kinetic energy is converted into electrical energy.

Question 2.
Tabulate the different components of an electric circuit and their respective symbols.
Answer:

Question 3.
Write short notes on conductors and insulators.
Answer:
Conductors:
The rate of flow of electric charges in a circuit is called electric current. The materials which allow electric charges to pass through them are called conductors.
Examples: Copper, iron, aluminum, impure water, earth, etc.,

Iniulaton (Non-Conductors):
The materials which do not allow electric charges to pass through them are called insulators or non-conductors.
Examples: plastic, glass, wood, rubber, china clay, ebonite, etc.

IX. Questions Based on Higher Order Thinking Skills

Question 1.
Rahul wants to make an electric circuit. He has a bulb, two wires, a safety pin, and a piece of copper. He does not have any electric cell or battery. Suddenly he gets some idea. He uses lemon instead of a battery and makes a circuit. Will the bulb glow?
Answer:
1. Yes, the bulb will glow.
2. Insert a piece of copper on one side of lemon, safety pin on another side. This system will work as a battery.
3. Copper rod – Positive terminal
Safety pin – Negative terminal, Lemon – Electrolyte
4. Connect the connecting wire in both the terminals and finally connect to the bulb.
5. The current produced is passed through the circuit and the bulb will glow.

X. Search ten words in the given word grid and classify them as conductors and insulators

Question 1.

Answer:

Samacheer Kalvi 6th Science Electricity Additional Important Questions and Answers

I. Choose the right answer:

Question 1.
Here heat energy is converted into electric energy
(a) Thermal power station
(b) Atomic power station
(c) Hydel power station
(d) Windmills
Answer:
(a) Thermal power station

Question 2.
In atomic power station, ________ is used to rotate the turbine.
(a) water
(b) steam
(c) Air
(d) diesel
Answer:
(b) steam

Question 3.
Which one of the following is using secondary using cells?
(a) Hand watch
(b) Robo toy
(c) Laptop
(d) None of these
Answer:
(c) Laptop

Question 4.
If two or more ________ are connected in series in a circuit, then it is called a series circuit.
(a) keys
(b) cells
(c) connecting wires
(d) bulbs
Answer:
(d) bulbs

Question 5.
……….. fish is able to produce an electric current.
(a) Goldfish
(b) Electric Eel
(c) Katla
(d) Salamon fish
Answer:
(b) Electric Eel

II. Fill in the blanks:

1. Any device from which electricity is produced is called ………..
2. The place in Kanyakumari district that has more windmills is ………..
3. ……….. have long economic lives and low operating cost.
4. A chemical solution that produces positive and negative ions is used as ………….
5. ……….. invented the electric bulb.

Answer:

1. Source of electricity
2. Aralvaimozhi
3. Hydel power stations
4. electrolyte
5. Thomas Alva Edison

III. Say True of False.

1. Atomic power stations convert nuclear energy into electric energy.
2. The cell can be used only once is called secondary cells.
3. We can produce electricity from potatoes.
4. An ammeter is connected in parallel in circuits.
5. The voltage of the torchlight battery is 1.5 v.

Answer:

1. True
2. False
3. 3. True
4. False
5. True

IV. Match the Following:

Answer:
1. – iii
2. – i
3. – iv
4. – ii
5. – v

V. Assertion and Reason

Question 1.
Assertion (A) : Experiments with electricity should only be performed with torch or radio batteries.
Reason (R) : Household electric supply will have high voltage and dangerous
a. Both A and R are correct and R is the correct explanation for A.
b. A is correct, but R is not the correct explanation for A.
c. A is wrong but R is correct.
d. Both A and R are correct and R is not the correct explanation
Answer:
a. Both A and R are correct and R is the correct explanation for A.

Question 2.
Assertion (A) : Primary cells can not be recharged, they can be used only once.
Reason (R) : In vehicles, we use primary cells.
a. Both A and R are correct and R is the correct reason for A.
b. A is true but R is not correct.
c. Both A and R are correct, but R is not the correct reason for A
d. A is not correct but R is correct
Answer:
b. A is true but R is not correct

VI. Very Short Answer:

Question 1.
What are the places in which atomic power stations located in Tamil Nadu?
Answer:

1. Kalpakkam, Kanchipuram district.
2. Koodankulam, Tirunelveli district.

Question 2.
List out the parts required to make an electric circuit
Answer:
A key, connecting wires, dry cell or battery, and electric bulb.

Question 3.
How to connect the cells in torchlight to glow bulbs?
Answer:
1. Connect the positive terminal of one cell with the negative terminal of another cell.
2. The bulb will glow.

Question 4.
How electric current is produced in Thermal power stations?
Answer:
The thermal energy generated by burning coal is used to produced steam. The steam thus produced is used to rotate the turbine. While the turbine rotates, the coil of wire kept between the electromagnet rotates. Due to electromagnetic induction, electricity is produced.

Question 5.
What is meant by a battery or collection of cells?
Answer:
Two or more cells are combined together to make a battery or collection of cells.

VII. Long Answer Questions:

Question 1.
What is a cell? Explain the types of cells.
Answer:
A device that converts chemical energy into electrical energy is called a cell. Cells are classified, in two types. They are-

1. Primary cells,
2. Secondary cells.

1. Primary cells:

• They can not be recharged.
• They can be used only once.
• They are small in size.
• Eg. Cells used in clocks, watches, and toys, etc.

2. Secondary cells:

• A cell that can be recharged many times is called secondary cells.
• Depending upon usage size may vary.
• Eg. Secondary cells are used in mobile phones, laptops, emergency lamps, and vehicle batteries.

Question 2.
What are the safety measures to safeguard a person from electric shock?
Answer:
Safety measures to safeguard a person from electric shock:

1. Switch off the power supply.
2. Remove the connection from the switch.
3. Push him away using non-conducting materials.
4. Give him first aid and take him to the nearest health centre.

Students can download 6th Science Term 2 Chapter 4 Air Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 2 Chapter 4 Air

Samacheer Kalvi 6th Science Air Text Book Back Questions and Answers

I. Choose the correct answer:

Question 1.
……… is the percentage of nitrogen in the air.
(a) 78%
(b) 21%
(c) 0.03%
(d) l%
Answer:
(a) 78%

Question 2.
Gas exchange takes place in plants using _______
(a) Stomata
(b) Chlorophyll
(c) Leaves
(d) Flowers
Answer:
(a) Stomata

Question 3.
The constituent of air that supports combustion is ……….
(a) Nitrogen
(b) carbon-di-oxide
(c) Oxygen
(d) water vapour
Answer:
(c) Oxygen

Question 4.
Nitrogen is used in the food packaging industry because it _______
(a) provides colour to the food
(b) provides oxygen to the food
(c) adds proteins and minerals to the food
(d) keeps the food fresh
Answer:
(d) keeps the food fresh

Question 5.
……… and ………… are the two gases, which when taken together, make up about 99 percentage of air.
I. Nitrogen
II. carbon-di-oxide
III. Noble gases
IV. Oxygen
(a) I and II
(b) I and III
(c) II and IV
(d) I and IV
Answer:
(d) I and IV

II. Fill in the blanks

1. …………. is the active component of air.
2. The gas given out during photosynthesis is ………..
3. ………. gas is given to the patients having breathing problems.
4. ………. can be seen moving in a beam of sunlight in a dark room.
5. …………. gas turns lime water milky.

Answer:

1. Oxygen(O₂)
2. Oxygen(O₂)
3. Oxygen (O₂)
4. Tiny dust particles
5. Carbon dioxide (CO₂)

III. True or False. If False, give the correct statement

1. Inhaled air contains a large amount of carbon-di-oxide
2. Planting trees help in decreasing global warming
3. The composition of air is always exactly the same.
4. Whales come up to the water surface to breathe in oxygen.
5. The balance of oxygen in the atmosphere is maintained through photosynthesis in animals and respiration in plants.

Answer:

1. False – (Inhaled air contains a large amount of oxygen)
2. True
3. False – (The composition of air changes slightly from place to place & also from season to season)
4. True
5. False – (The balance of oxygen in the atmosphere is maintained through Photosynthesis in plants & respiration in animals)

IV. Match the following

Answer:
1. – c
2. – b
3. – d
4. – e
5. – a

V. Arrange the following statements in correct sequence

1. Plants manufacture food by a process called photosynthesis.
2. Plants require energy for their growth.
3. Plants take in oxygen and release carbon-di-oxide just as animals.
4. Plants take carbon-di-oxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.
5. Such oxygen is available to animals and human beings for breathing.
6. During this process, oxygen is released by plants.
Answer:
2. Plants require energy for their growth.
1. Plants manufacture food by a process called photosynthesis.
6. During this process, oxygen is released by plants.
3. Plants take in oxygen and release carbon-di-oxide just as animals.
5. Such oxygen is available to animals and human beings for breathing.
4. Plants take carbon-di-oxide from the atmosphere, use chlorophyll in the presence of sunlight and prepare food.

VI. Analogy

Question 1.
Photosynthesis: ……….. ::
Respiration : Oxygen
Answer:
CO₂

Question 2.
78% of air : Does not support combustion ::
……… : Supports combustion
Answer:
21% of air

VII. Observe the given figure carefully and answer the questions.

Question 1.
What will happen if we remove plants from the aquarium?
Answer:

1. The production of O₂ and absorption of CO₂ and NH₃ will you reduced.
2. Plants provide shelter to fish, so, they feel insecure.
3. Algae growth will increase.

Question 2.
What will happen if we remove the fish from the aquarium and keep it (with green plants) in a dark place?

Answer:

1. Most of the fishes require both periods of light and darkness.
2. In a dark place, they will loose their sight and pigmentation.

VIII. Give a very short Answer

Question 1.
What is the atmosphere? Name the five layers of the atmosphere.
Answer:
Our earth is surrounded by a huge envelope of air called the atmosphere.
The atmosphere is made of five different layers – the Troposphere, the Stratosphere, the Mesosphere, the Ionosphere, and the Exosphere.

Question 2.
How do the roots of land plants get oxygen for breathing?
Answer:
Oxygen is present in the air spaces of soil. This O₂ is taken by root hairs through diffusion to the rest of the plant.

Question 3.
What should be done if the clothes of a person catch fire accidentally? Why?
Answer:

1. Cover the person in a rug or blanket and Roll him on the floor.
2. This will cut off the air and put out the flames.
3. A suitable fire extinguisher can also be chosen.

Question 4.
What will happen if you breathe through your mouth?
Answer:
Several health conditions and risk factors can lead to mouth breathing.

1. Snoring
2. dry mouth
3. daytime tired
4. Poor dental health

IX. Give a short answer

Question 1.
Biscuits kept open on a plate during monsoon days lose their crispness. Why?
Answer:
During monsoon days, Water vapour from the atmosphere is absorbed in the biscuits. So the biscuits lose its crispness.

Question 2.
Why do traffic assistants wear a mask on duty?
Answer:
Traffic assistants are continually exposed to smoke emitted out from the vehicles. Inhaling the pollutants in the smoke may cause breathing and lung problems. So they wear a mask on duty.

X. Answer in detail

Question 1.
How do plants and animals maintain the balance of oxygen and carbon-di¬oxide in air?
Answer:

1. plants in forests release oxygen through the process of photosynthesis and help in providing oxygen to animals for respiration.
2. Plants consume carbon dioxide released by the animals. In this way, plants help in maintaining a balance of oxygen and carbon dioxide in the atmosphere.

Question 2.
Why is the atmosphere essential for life on earth?
Answer:

The atmosphere is essential for life because it maintains an appropriate climate for the maintenance of life by carrying out the following activities:

1. The atmosphere keeps the average temperature of the Earth fairly constant during the day time.
2. It prevents a sudden increase in temperature during the day time.
3. It also slows down the escape of heat from the surface of the Earth into outer space during the night time.

XI. Questions Based on Higher Order Thinking Skills.

Question 1.
Can you guess why fire extinguishers throw a stream of carbon-di-oxide while putting – off fire?
Answer:
It is because carbon-di-oxide (CO₂) does not support combustion. When sprayed on burning object it stops the supply of oxygen and controls the fire.

Samacheer Kalvi 6th Science Air Additional Important Questions and Answers

I. Choose the appropriate answer

Question 1.
A layer consisted of water vapour which is responsible for making clouds is.
(a) Stratosphere
(b) Mesosphere
(c) Troposphere
(d) Exosphere
Answer:
(c) Troposphere

Question 2.
_______ is responsible for making clouds.
(a) Hydrogen
(b) Oxygen
(c) Water vapour
(d) Carbon-di-oxide
Answer:
(c) Water vapour

Question 3.
A process without emitting flame is called as …………
(a) Combustion
(b) Burning
(c) Cherring
(d) Melting
Answer:
(a) Combustion

Question 4.
_______ was able to identify highly reactive gas called oxygen.
(a) Lavoisier
(b) Ingenhousz
(c) Rutherford
(d) Joseph Priestley
Answer:
(d) Joseph Priestley

Question 5.
Which is used in refrigerating meat and fish?
(a) Liquid Ammonia
(b) Liquid Nitrogen
(c) Solid CO₂
(d) Helium
Answer:
(c) solid CO₂

II. True or False. If False, give the correct statement

1. Oxygen is used for the synthesis of protein and fertilizers.
2. CO₂ turns calcium hydroxide solution to a milky white solution.
3. The air in coastal areas have more oxygen.
4. The role of chlorophyll is to absorb light from the sun.
5. When cooled to -57°C, gaseous carbon-di-oxide becomes a liquid.

Answer:

1. False – (Nitrogen is used for the synthesis of protein and fertilizers)
2. True
3. False – (The air in coastal areas have more water vapour)
4. True
5. False – (When cooled to -57°C, gaseous carbon-di-oxide becomes a solid)

III. Match the following

Answer:
i. – c
ii. – d
iii. – a
iv. – b

IV. Give very short answer

Question 1.
Where does Ozone layer lie?
Answer:
Ozone layer is present in stratosphere lies above the troposphere.

Question 2.
“Air is not an elementary substance, but a composition”. Why?
Answer:
Air is a composite mixture of many gases like N₂, O₂, CO₂ and others.

Question 3.
Mention the percentage composition of Air.
Answer:

Question 4.
What is Burning?
Answer:
The process of firing of a substance in the presence of O₂ and releasing a large amount of light and heat.

Question 5.
Define – Combustion. Give an example.
Answer:
The process of firing which does not emit flame is called combustion (fire without flame). Ex: Rocket propellants (fuel with oxygen).

V. Answer in detail

Question 1.
Briefly explain the process of ‘Photo Synthesis’.
Answer:

1. Plants manufacture their food by ‘Photo Synthesis’.
2. CO₂ from the air and water from the solid react in the presence of sunlight to produce food.
   
3. Chlorophyll absorbs light from the sun.
4. The liberated O₂ during photosynthesis is much more than the O₂ consumed by the plants for respiration.

Question 2.
Mention the uses of Air.
Answer:

1. For breathing by plants and Animals.
2. For burning fuels like wood, coal, kerosene, LPG etc.,.
3. Compressed air is used to fill tyres of vehicles.
4. Maintaining the water cycle in nature. Because this air did not have O₂ and CO₂.
5. O₂ gas is used by patients in Hospitals, Climbers in mountains, Divers in Deepsea.

Students can download 6th Science Term 1 Chapter 2 Force and Motion Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 2 Force and Motion

Samacheer Kalvi 6th Science Force and Motion Text Book Back Questions and Answers

I. Choose the Correct Answer:

Question 1.
Unit of speed is
a. m
b. s
c. kg
d. m/s
Answer:
d. m/s

Question 2.
Oscillatory motion among the following is
(a) Rotation of the earth about its axis
(b) Revolution of the moon about the earth
(c) To and fro movement of a vibrating string
(d) All of these
Answer:
(c) To and fro movement of a vibrating string

Question 3.
The correct relation among the following is
a. speed = distance × time
b. Speed = distance / time,
c. speed = time / distance
d. Speed = 1 / (distance × time)
Answer:
b. Speed = distance / time

Question 4.
Gita rides with her father’s bike to her uncle’s house which is 40 km away from her home. She takes 40 minutes to reach there.
Statement 1 : She travels with a speed of 1 km/minute.
Statement 2 : She travels with a speed of 1 km/hour
(a) Statement 1 alone is correct.
(b) Statement 2 alone is correct.
(c) Both Statement 1 and 2 are correct.
(d) Neither statement 1 nor statement 2 is correct.
Answer:
(a) Statement 1 alone is correct

II. Find whether the following statements are true or false. – if false give the correct Answer.

1. To and fro motion is called oscillatory motion.
2. Vibratory motion and rotatory motion are periodic motions.
3. Vehicles moving with varying speeds are said to be in uniform motion.
4. Robots will replace human in future.

Answer:

1. True
2. True
3. Non-uniform.
4. False, Robots can never be conscious.

III. Fill in the blanks:

1. A bike moving on a straight road is an example of ……… motion.
2. Gravitational force is a ………… force.
3. Motion of a potter’s wheel is an example of ………… motion.
4. When an object covers equal distances in equal interval of time, it is said to be in ……….. motion.

Answer:

1. Linear
2. non-contact
3. Rotatory
4. Uniform

IV. Match the following:

Answer:
1. – c
2. – d
3. – b
4. – a
5. – e

V. Analogy:

1. Kicking a ball: contact force :: falling of leaf : …………
2. Distance : metre :: Speed : ………….
3. circulatory motion : a spinning top oscillatory motion : …………

Answer:

1. non contact forces
2. m/s
3. Pendulum

VI. Given below is the distance – travelled by an elephant across a forest with uniform speed. 

Complete the data of the table given below with the idea of uniform speed.

Answer:

VII. Complete the web chart.

Answer:

VIII. Give one word for the following statements.

Question 1.
The force which acts on an object without Physical contact with it.
Answer:
Non-contact force.

Question 2.
A change in the position of an object with time.
Answer:
Motion.

Question 3.
The motion which repeats itself after a fixed interval of time.
Answer:
Oscillatory motion.

Question 4.
The motion of an object travels equal distances in equal intervals of time.
Answer:
Uniform motion.

Question 5.
A machine capable of carrying out a complex series of actions automatically.
Answer:
Robots.

IX. Answer the following in a sentence or two:

Question 1.
Define force.
Answer:
Forces are push or pull by an animate or inanimate agency.

Question 2.
Name different types of motion based on the path.
Answer:

1. Linear motion.
2. Curvilinear motion.
3. Circular motion.
4. Rotatory motion.
5. Oscillatory motion.
6. Zigzag (irregular) motion.

Question 3.
If you are sitting in a moving car will you be at rest or motion with respect to your friend sitting next to you?
Answer:
I am at rest with respect to my friend, sitting inside the car.

Question 4.
The rotation of the earth is a periodic motion. Justify.
Answer:
Motion repeated in equal intervals of time is called periodic motion. The earth rotates on its axis once in 24 hours. The duration of time is fixed as 24 hours. Therefore the rotation of the earth is a periodic motion.

Question 5.
Differentiate between rotational and curvilinear motion
Answer:

Rotational motion:

1. A body moves along a circular path.
2. Without changing its position, about its own (fixed) axis.
3. Eg. Rotation of a spinning top.

Curvilinear motion:

1. A body moves along a curved path.
2. Changes its position with motion.
3. Eg. Throwing paper airplanes or paper darts.

X. Calculate.

Question 1.
A vehicle covers a distance of 400 km in 5 hours calculate its average speed.
Answer:
Average speed = \(\frac{distence}{time}\)
= \(\frac{400}{5}\) = 80 km per hour

XI. Answer in detail:

Question 1.
What is motion? classify different types of motion with examples.
Answer:
Motion: The change of position of an object with respect to time is known as motion.

1. Based on Path:

• Linear motion. – Ex.: Parade of the soldiers.
• Curvilinear motion. – Ex.: Paper flight moving.
• Circular motion. – Ex.: Swirling stone tied to the rope.
• Rotatory motion. – Ex.: Rotating top.
• Oscillatory motion. – Ex.: Clock pendulum.
• Zigzag (irregular) motion. – Ex.: Motion of a bee.

2. Based on Duration :

• Periodic motion. – Ex.: Motion of a bob of simple Pendulum.
• Non-periodic motion. – Ex.: Swaying of the branches of a tree.

3. Based on Speed:

• Uniform motion. – Ex.: Hour hand of a clock.
• Non – uniform motion. – Ex.: Motion of a train, as it leaves a station.

XII. Fill with Examples

Answer:
Linear motion – A man walking in a straight road
Curvilinear motion – motion of paper Aeroplane
Self rotatory motion – Motion of wheel in a cart
Circular motion – Motion of moon a round earth.
Oscillatory motion – Motion of pendulum
Irregular motion – Motion of honey bee.

Samacheer Kalvi 6th Science Force and Motion Additional Important Questions and Answers

I. Choose the best option:

Question 1.
How earth revolves?
(a) From west to east
(b) east to west
(c) From north to south
(d) south to west.
Answer:
(a) From west to east

Question 2.
People walking in a crowded street is an example of _______ motion.
(a) linear
(b) circular
(c) rotatory
(d) zigzag
Answer:
(d) zigzag

Question 3.
What is the unit of average speed in SI system?
(a) metre / second
(b) kilometre/ seconds
(c) kilometre/ time
(d) Metre/ Time.
Answer:
(a) metre / second

Question 4.
Usain Bolt crossed 100 metre in _______ seconds and made a world record.
(a) 9.58
(b) 9.83
(c) 9.85
(d) 9.38
Answer:
(a) 9.58

Question 5.
The motion of the moon which revolves around the earth is
(a) Oscillatory motion
(b) Periodic motion
(c) curvilinear
(d) b and c
Answer:
(b) Periodic motion

II. Correct Answer: If it is wrong give the correct answer.

1. Change of position of an object with respect to time is motion
2. Swirling stone tied to the rope is an example of rotatory motion.
3. The children flying in a swing is a periodic motion.
4. All the oscillatory movements are periodic motions.
5. The SI unit of speed is kilometer

Answer:

1. correct
2. wrong.
   A swirling stone tied to the rope is an example of circular motion.
3. correct
4. correct
5. wrong, The SI unit of speed is meter.

III. Fill up the blanks:

1. People walking in a crowded street is ……….. type of motion.
2. Object moves not at a constant speed then the motion is ………..
3. If Priya in her cycle travels 40 km in 2 hours then what is her average speed?
4. Motion is of ………… types.
5. The movement of a body about its own axis is ………….

Answer:

1. Irregular
2. on- uniform motion
3. 20 km /hr
4. four
5. Rotatory motion

IV. Matching

Answer:
1. – b
2. – d
3. – a
4. – c

V. Fill up the blanks in accordance with their relation:

1. The Motion of train – uniform motion. The motion of vehicles ………..
2. Periodic motion – The motion of the moon revolves around the earth. Oscillatory motion ………..

Answer:

1. non – uniform motion.
2. Motion of simple pendulum.

VI. Fill up the missing statement.

VII. Fill up the blanks with the help of examples:

1. The motion of the needle of a clock.
2. The motion of an athlete of 100 m race
3. The motion of flag wagging
4. The motion of a car that goes in a circular path.
5. The motion of a needle in a sewing machine.

Answer:

1. Oscillatory motion.
2. Linear motion.
3. Non- periodic motion
4. circular motion
5. periodic motion or uniform motion.

VIII. Two Mark Questions: Short answers:

Question 1.
Define motion.
Answer:
When there is a change of position of an object with respect to time, then it is called motion.

Question 2.
What are the types of Force?
Answer:

1. Contact Force;
2. Non-Contact Force

Question 3.
List out the types of forces on the basis of contact.
Answer:
There are two types:

1. Contact force,
2. Non-contact force.

Question 4.
What is the average speed of the object?
Answer:
The distance travelled by an object in unit time is called the average speed of the object.

Question 5.
Define non-periodic motion.
Answer:
When a motion is not in uniform interval, then such motion is called non-periodic motion.

IX. Give Detailed Answers:

Question 1.
What is a force? What are its types?
Answer:
Forces: Forces are push or pull by an animate or inanimate agency.
Types of Forces:

1. Contact forces;
2. Non – Contact forces.

1. Contact forces: The force that is executed by touching the body is a contact force Eg. Kicking the football
2. Non – Contact forces: The force is applied. Without touching the object then it is called noncontact force.
Forces can
(i) Change the states of the body from rest to motion or motion to rest.
(ii) Either change the speed or direction or both of the body.
(iii) Change the shape of the body.

Students can download 6th Science Term 1 Chapter 1 Measurements Questions and Answers, Notes, Samacheer Kalvi 6th Science Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Science Solutions Term 1 Chapter 1 Measurements

Samacheer Kalvi 6th Science Measurements Text Book Back Questions and Answers

I. Choose the correct answer

Question 1.
The girth of a tree can be measured by
(a) Metre scale
(b) Metre rod
(c) plastic ruler
(d)Measuring tape.
Answer:
(d) Measuring tape.

Question 2.
The conversion of 7 m into cm gives
(a) 70 cm
(b) 7 cm
(c) 700 cm
(d) 7000 cm
Answer:
(c) 700 cm

Question 3.
Quantity that can be measured is called ………
(a) Physical quantity
(b) Measurement
(c) Unit
(d) Motion.
Answer:
(b) Measurement

Question 4.
Choose the correct one
(a) km > mm > cm > m
(b) km> mm> m > cm
(c) km>m>cm>mm
(d) km > cm > m > mm
Answer:
(c) km > m > cm > mm

Question 5.
While measuring length of an oject using a ruler, the position of your eye should be
(a) Left side of the point.
(b) Vertically above the point where the measurement is to be taken.
(c) Right side of the point.
(d) Anywhere according to one’s convenience.
Answer:
(b) Vertically above the point where the measurement is to be taken.

II. True or false.

1. We can say that mass an object is 126 kg
2. Length of one’s chest can be measured by using metre scale.
3. Ten millimetres makes one centimetre.
4. A hand span is a reliable measure of length.
5. The SI system of units is accepted everywhere in the world.

Answer:

1. True
2. False
3. True
4. False
5. True

III. Fill up the blanks:

1. SI unit of length is symbolically represented as ………..
2. 500 gm = …………. kilogram.
3. Distance between Delhi and Chennai can be measured in ……….
4. 1 m = ………. cm.
5. 5 km = ………. m.

Answer:

1. metre
2. 0.5
3. Kilometre
4. 100
5. 5000

IV. Analogy

Sugar: Beam Balance, Lime Juice?
Answer:
Graduated cylinders.

Height of a person: Cm: Length of your sharpened pencil lead?
Answer:
mm

Milk: Volume; vegetables?
Answer:
Weight

V. Match the following:

Answer:
1. Cubit
2. metre
3. 10^-9
4. second
5. 10³

VI. Complete the given table:

Answer:

VI. Arrange in increasing order of unit

1 Metre, 1 Centimetre, 1 Kilometre, and 1 Millimetre.
Answer:
1 Millimetre, 1 Centimetre, 1 Metre, 1 Kilometre.

VIII. Find the answer for the following questions within the grid:

1. 10^-3 is one _______
2. SI unit of time ______
3. Cross view of reading for measurement leads to ______
4. _______ is the one what a clock reads.
5. ______ is the amount of substance present in an object.
6. _______ can be taken to get the final reading of the recordings of different students for a single measurement.
7. ______ is a fundamental quantity.
8. _______ shows the distance covered by an automobile.
9. A tailor use _______ to take measurements to stitch a cloth.
10. Liquids are measured with this physical quantity ______

Answer:

1. millimeter
2. Second
3. Parallax
4. Time
5. mass
6. Accurate
7. Length
8. Odometer
9. tape
10. litres

IX. Answer in a word or two.

Question 1.
What is the full form of the SI system?
Answer:
An International System of unit

Question 2.
Name any one instrument used for measuring mass.
Answer:
Beam Balance

Question 3.
Find the odd one out: Kilogram, Millimetre, Centimetre, Nanometre
Answer:
Kilogram.

Question 4.
What is the SI unit of mass?
Answer:
Kilogram

Question 5.
What are the two parts present in a measurement?
Answer:

1. multiple
2. sub

X. Answer in a sentence or two:

Question 1.
Define measurement.
Answer:
The comparison of an unknown quantity with some known quantity is known as measurement.

Question 2.
Define mass.
Answer:
Mass is the measure of the amount of matter in an object.

Question 3.
The distance between the two places is 43.65 km. convert it into meter and cm.
Answer:
(a) Convert km into metre
1 km = 1000m
∴ 43.65 km = 43.65 × 1000 = 43650.00 = 43650
= 43650 m.

(b) Convert km into cm.
1 km = 1000 m
1 m = 100 cm
1 km = 1000 × 100 cm
1 km = 100000 cm
∴ 43.65 km = 43.65 × 100000 = 4365000.00
= 4365000 cm.

Question 4.
What are the rules to be followed to make an accurate measurement with scale?
Answer:

1. Take care to write the correct submultiple.
2. Always keep the object in parallel to the scale.
3. Start the measurement from ‘0’ of the scale.

XI. Solve the following:

Question 1.
The distance between your school and your house is 2250 m. Express this distance in kilometre.
Answer:
Distance between school and house is 2250 m.
1000 m = 1 km
∴ 2250 m = 2250 ÷ 1000 = 2.25 km.

Question 2.
While measuring the length of a sharpened pencil, the reading of the scale at one end is 2.0 cm and at the other end is 12.1 cm. What is the length of the pencil?
Answer:
Sharpened pencil Reading at one end = 2.0 cm.
Sharpened pencil Reading at the other end = 12.1 cm.
Length of the pencil = Difference between two ends.
= 12.1 cm. – 2.0 cm.
= 10.1 cm.

XII. Write in detail:

Question 1.
Explain two methods that you can use to measure the length of a curved line.
Answer:
Measuring the length of a curved line, by two methods.
First method – using a string.

1. Draw a curved line AB on the paper.
2. Place a string along the curved line.
3. Make sure that the string covers every bit of the curved line.
4. Mark the points where the curved line begins and ends on the string.
5. Now stretch the string along the length of a meter scale.
6. Measure the distance between two markings of the string.
7. This will give the length of a curved line.

Second method – using a divider.

1. Draw a curved line AB on a paper.
2. Separate the legs of the divider by 0.5 cm or 1 cm using a ruler.
3. Place it on the curved line starting from one end. Mark the position of the other end.
4. Move it along the line again and again cutting the line into a number of segments of equal lengths.
5. The remaining parts of the line can be measured using a scale.
6. Count the number of segments.
7. Length of the line = (No. of segments × length of each segment) + length of the leftover part.

Question 2.
Fill up the following chart.

Answer:

Samacheer Kalvi 6th Science Measurements Additional Important Questions and Answers

I. Choose the best option:

Question 1.
What is 7 m in mm?
(a) 0.7 mm
(b) 700 mm
(c) 7000 mm
(d) 70 mm
Answer:
(c) 7000 mm

Question 2.
The distance between one end and the other end is called _____
(a) mass
(b) length
(c) time
(d) None
Answer:
(b) length

Question 3.
What is the unit of length?
(a) metre
(b) litre
(c) second
(d) kilogram.
Answer:
(a) metre

Question 4.
Five kilometre is equal to _____
(a) 500 cm
(b) 500 m
(c) 5000 m
(d) 5000 cm
Answer:
(c) 5000 m

Question 5.
These are the instruments used in measuring the volume of objects with irregular shapes.
(a) Balance
(b) Electronic balance
(c) Displacement of water method
(d) sand clock.
Answer:
(c) Displacement of water method.

II. True or false:

1. The comparison of a known quantity with the unknown quantity is the mass.
2. The area can be calculated by using the two lengths and width.
3. Using electronic balance weight can be measured accurately.

Answer:

1. False
2. True
3. False.

III. Fill in the Blanks.

1. 78.75 cm = ______ m ______ cm
2. 1195 m = ______km ______ m
3. 15 cm 10 mm = ______ mm
4. 45 km 33 m = ______ m.
5. The metric system of unit is developed in the year ______ by French.

Answer:

1. -78 m, 75 cm
2. -1 km, 195 m
3. -160 mm
4. -45033 m
5. -1790

IV. Matching

Question 1.

Answer:
1. – d
2. – c
3. – b
4. – a

Question 2.

Answer:
1. – d
2. – c
3. – b
4. – a

V. Write the following unit in ascending order.

Question 1.
Ton – gram – kilogram – Metric ton
Answer:
Gram – kilogram – ton – metric ton.

VI. Very Short Answer (2 marks)

Question 1.
What is the length?
Answer:
The distance between one end and the other desired end is called length.

Question 2.
Differentiate mass from weight:
Answer:
Mass :
Mass is the measure of the amount of matter in an object.
Unit – kilogram

Weight :
Weight is the gravitational pull experienced by the mass.
Unit – Newton.

Question 3.
List the SI units of length, mass, and time.
Solution:

1. Length is measured by metre (m)
2. Mass is measured by the kilogram (kg)
3. Time is measured by second (s).

Question 4.
What is the basic quantity of physics?
Answer:

1. Length
2. Mass
3. Time.

Question 5.
Differentiate of Mass and Weight.
Answer:
Mass:

• Amount of matter in an object
• The measuring instrument is Beam balance

Weight:

• Gravitational pull experienced by the mass
• The measuring instrument is an electronic balance

Question 6.
What is the clock used to measure the time accurately?
Answer:

1. Electronic clock
2. Stop clock

Question 7.
Hold a sheet paper in one hand and a book in one hand. Which hand feels heavy? Why?
Solution:
The hand, which holds the book, will feel heavy. The mass of the book is more than that of a single sheet of paper. Therefore, the pull on the book is more than that of the paper. Hence our hand has to give more force to hold a book than a paper.

VII. Give detailed answers: (5 marks)

Question 1.
What are the features that we must give importance in measuring?
Answer:
The object should match with the ‘o’ of the scale.
The object should be in parallel with the scale.
Always start from ‘O’.
Measure the bigger division (m) first and then measure the smaller (mm) division. When we measure the bigger division it should be measured initially and then mark a point and then measure the smaller division (eg) if the length of the pencil is 6 cm 2 mm and then it is 6.2 cm.

Question 2.
How will you measure the weight of the object with irregular shapes?
Answer:
Fill a graduated measuring cylinder with 50 ml of water.
Tie the stone with a piece of fine thread and immerse the stone completely in the water. As the stone is immersed the water level will increase. And show 75 ml of rising. The stone displaces water and hence the rise. The amount of water displaced will be the volume of the stone.

Students can download Maths Chapter 2 Integers Ex 2.1 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 2 Integers Ex 2.1

Question 1.
Fill in the blanks:
(i) The potable water available at 100 m below the ground level is denoted as ……… m.
(ii) A swimmer dives to a depth of 7 feet from the ground into the swimming pool. The integer that represents this, is ……… feet.
(iii) -46 is to the ……….. of -35 on the number line.
(iv) There are ……… integers from -5 to +5 (both inclusive)
(v) …….. is an integer which is neither positive nor negative.
Solution:
(i) 100
(ii) -7
(iii) left
(iv) 11
(v) 0

Question 2.
Say True or False
(i) Each of the integers -18, 6, -12, 0 is greater than -20.
(ii) -1 is to the right of 0.
(iii) -10 and 10 are at equal distance from 1.
(iv) All negative integers are greater than zero.
(v) All whole numbers are integers.
Solution:
(i) True
(ii) False
(iii) False
(iv) False
(v) True

Question 3.
Mark the numbers 4, -3, 6, -1 and -5 on the number line.
Solution:

Question 4.
On the number line, which number is
(i) 4 units to the right of -7?
(ii) 5 units to the left of 3?
Solution:
(i) -3
(ii) -2

Question 5.
Find the opposite of the following numbers.
(i) 44
(ii) -19
(iii) 0
(iv) -312
(v) 789
Solution:
(i) Opposite of 44 is – 44
(ii) Opposite of-19 is + 19 or 19
(iii) Opposite of 0 is 0
(iv) Opposite of-312 is + 312 or 312
(v) Opposite of 789 is – 789.

Question 6.
If 15 km east of a place is denoted as +15 km, What is the integer that represents 15 km west of it?
Solution:
Opposite of east is west.
∴ If 15 km east is + 15 km, then 15 km west is – 15 km.

Question 7.
From the following number lines, identify the correct and the wrong representations with reason.

Solution:
(i) Wrong, Integers are not continuously marked
(ii) Correct, Integers are correctly marked.
(iii) Wrong, Integer -2 is marked wrongly.
(iv) Correct, Integers are marked at equal distance.
(v) Wrong, negative integers marked wrongly.

Question 8.
Write all the integers between the given numbers.
(i) 7 and 10
(ii) -5 and 4
(iii) -3 and 3
(iv) -5 and 0
Solution:
(i) 8, 9
(ii) -4, -3, -2, -1, 0, 1, 2, 3
(iii) -2, -1, 0, 1, 2
(iv) -4, -3, -2, -1

Question 9.
Put the appropriate signs as <, > or = in the blank.
(i) -7 ___ 8
(ii) -8 ___ -7
(iii) -999 ___ -1000
(iv) 0 ___ -200
Solution:
(i) <
(ii) <
(iii) >
(iv) =
(v) >

Question 10.
Arrange the following integers in ascending order.
(i) -11, 12, -13, 14, -15, 16, -17, 18, -19, -20
(ii) -28, 6, -5, -40, 8, 0, 12, -1, 4, 22
(iii) -100, 10, -1000, 100, 0, -1, 1000, 1, -10
Solution:

(i) -11, 12, -13, 14, -15, 16, -17, 18, -19, -20

• First separating the positive integers 12, 14, 16, 18 and the negative integers -11,-13,-15,-17,-19,-20.
• Then arranging the positive integers in ascending order we get 12, 14, 16, 18 and negative integers in ascending order as -20, -19, -17, -15, -13, -11 4
• Now the ascending order : -20, -19, -17, -15, -13, -11, 12, 14, 16, 18.

(ii) -28, 6, -5, -40, 8, 0, 12, -1, 4, 22

• Positive integers are 6, 8, 12, 4, 22 Negative integers are -28, -5, -40, -1
• Arranging the positive integers in ascending order we get 4, 6, 8, 12, 22 and the negative integers in ascending order -40, -28, -5, -1
• The number 0 is neither positive nor negative and stands in the middle.
• In ascending order : -40, -28, -5, -1, 0, 4, 6, 8,12, 22

(iii) -100, 10, -1000, 100, 0, -1, 1000, 1, -10

• Separating positive integers 10, 100, 1000, 1 and negative integers -100, -1000, -1, -10.
• Now the positive integers in ascending order 1,10,100,1000 and the negative integers in ascending order. -1000, -100, -10, -1
• Also ‘0’ stand in the middle as its is neither positive nor negative.
• ∴ The numbers in ascending order: -1000, -100, -10, -1, 0, 1, 10, 100, 1000.

Question 11.
Arrange the following integers in descending order.
(i) 14, 27, 15, -14, -9, 0, 11, -17
(ii) -99, -120, 65, -46, 78, 400, -600
(iii) 111, -222, 333, -444, 555, -666, 777, -888
Solution:
(i) 27, 15, 14, 11, 0, -9, -14, -17
(ii) 400, 78, 65, -46, -99, -120, -600
(iii) 777, 555, 333, 111, -222, -444, -666, -888

Objective Type Questions

Question 12.
There are ……… positive integers from -5 to 6.
(a) 5
(b) 6
(c) 7
(d) 11
Solution:
(c) 7

Question 13.
The opposite of 20 units to the left of 0 is
(a) 20
(b) 0
(c) -20
(d) 40
Solution:
(a) 20

Question 14.
One unit to the right of -7 is
(a) +1
(b) -8
(c) -7
(d) -6
Solution:
(d) -6

Question 15.
3 units to the left of 1 is
(a) -4
(b) -3
(c) -2
(d) 3
Solution:
(c) -2

Question 16.
The number which determines marking the position of any number to its opposite on a number line is
(a) -1
(b) 0
(c) 1
(d) 10
Solution:
(b) 0

Students can download Maths Chapter 1 Fractions Ex 1.2 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 1 Fractions Ex 1.2

Miscellaneous Practice Problems

Question 1.
Sankari purchased 2\(\frac{1}{2}\) m cloth to stich a long skirt and 1\(\frac{3}{4}\) m cloth to stitch blouse. If the cost is Rs. 120 per metre then find the cost of cloth purchased by her.
Solution:
Total cloth purchased

cost of 1 metre = Rs. 120
Total cost of cloth purchased
= Rs. 120 × \(\frac{17}{4}\)
= Rs. 510

Question 2.
From his office, a person wants to reach his house on foot which is at a distance of 5\(\frac{3}{4}\) km. If he had walked 2\(\frac{1}{2}\) km, how much distance still he has to walk to reach his house?
Solution:

Question 3.
Which is smaller? The difference between 2\(\frac{1}{2}\) and 3\(\frac{2}{3}\) or the sum of 1\(\frac{1}{2}\) and 2\(\frac{1}{4}\).
Solution:

∴ The difference of 2\(\frac{1}{2}\) and 3\(\frac{2}{3}\) is smaller

Question 4.
Mangai bought 6\(\frac{3}{4}\) kg of apples. If Kalai 1 bought 1\(\frac{1}{2}\) times a Mangai bought, then how many kilograms of apples did Kalai buy?
Solution:
Apples bought by Mangai = 6\(\frac{3}{4}\) kg
Apples bought by Kalai

Question 5.
The length of the staircase is 5\(\frac{1}{2}\) m. If one step is set at \(\frac{1}{4}\) m, then how many steps will be there in the staircase?

Solution:
Total length of the staircase = 5\(\frac{1}{2}\) m
length of each step = \(\frac{1}{4}\) m
No of steps in the stair case

= 22 steps

Challenge Problems

Question 6.
By using the following clues, find who am I?
(i) Each of my numerator and denominator is a single-digit number.
(ii) The sum of my numerator and denominator is a multiple of 3.
(iii) The product of my numerator and denominator is a multiple of 4.
Solution:
The numerator may be any one of!, 2, 3,4, 5, 6, 7, 8, 9 and the denominator may be any one of 1, 2,3,4, 5,6, 7,8,9. Sum of numerator and denominator is a multiple of 3.
∴ Possible proper fractions are \(\frac{1}{2}, \frac{1}{5}, \frac{1}{8}, \frac{2}{4}, \frac{2}{7}, \frac{3}{6}, \frac{3}{9}, \frac{4}{5}, \frac{4}{8}, \frac{5}{7}, \frac{6}{9}\)
Also given the product of numerator and denominator is a multiple of 4.
∴ Possible fractions are \(\frac{1}{8}, \frac{2}{4}, \frac{4}{5}, \frac{4}{8}\)

Question 7.
Add the difference between 1\(\frac{1}{3}\) and 3\(\frac{1}{6}\) and the difference between 4\(\frac{1}{6}\) and 2\(\frac{1}{3}\)
Solution:

Adding Difference

Question 8.
What fraction is to be subtracted from 9\(\frac{3}{7}\) to get 3\(\frac{1}{5}\)?
Solution:
Let the fraction be x
According to the problem

The fraction to be subtracted is 6\(\frac{8}{35}\)

Question 9.
The sum of two fractions is 5\(\frac{3}{9}\). If one of the fractions is 2\(\frac{3}{4}\), find the other fraction.
Solution:
Let the other fraction be x
According to the problem,

∴ The other fraction is 2\(\frac{7}{12}\)

Question 10.
By what number should 3\(\frac{1}{16}\) be multiplied to get 9\(\frac{3}{16}\)?
Solution:
Let the number be x
According to the problem,

x = 3
The number is 3

Question 11.
Complete the fifth row in the Leibnitz triangle which is based on subtraction.

Solution:

Question 12.
A painter painted \(\frac{3}{8}\) of the wall of which one third is painted in yellow colour. What fraction is the yellow colour of the entire wall?

Solution:
yellow colour of the entire wall
= \(\frac{3}{8}\) × \(\frac{1}{3}\)
= \(\frac{1}{8}\)

Question 13.
A rabbit has to cover 26\(\frac{1}{4}\) m to fetch its food. If it covers 1\(\frac{3}{4}\) m in one jump, then how many jumps will it take to fetch its food?

Solution:
Total distance = 26\(\frac{1}{4}\) m
Distance covered in one jump = 1\(\frac{3}{4}\) m
Number of jumps required to fetch the food

= 15

Question 14.
Look at the picture and answer the following questions.

(i) What is the distance from the school to Library via Bus stop?
(ii) What is the distance between School and Library via Hospital?
(iii) Which is the shortest distance between (i) and (ii)?
(iv) The distance between School and Hospital is times the distance between School and Bus stop.
Solution:


(iii) Via bus stop
(iv) 6 times (6 × \(\frac{3}{4}\) = \(\frac{18}{4}\) = \(\frac{9}{2}\) = 4\(\frac{1}{2}\))

Students can download Maths Chapter 1 Fractions Ex 1.1 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 3 Chapter 1 Fractions Ex 1.1

Question 1.
Fill in the blanks:
(i) 7\(\frac{3}{4}\) + 6\(\frac{1}{2}\) ………..
(ii) The sum of a whole number and a proper fraction is called ……….
(iii) 5\(\frac{1}{3}\) – 3\(\frac{1}{2}\) ………..
(iv) 8 ÷ \(\frac{1}{2}\) ………..
(v) The number which has its own reciprocal is ……….
Solution:

(ii) Mixed Fraction

(iii) 5\(\frac{1}{3}\) – 3\(\frac{1}{2}\)
= \(\frac{16}{3}\) – \(\frac{7}{2}\) = \(\frac{32-21}{6}\) = \(\frac{11}{6}\)
= 1\(\frac{5}{6}\)

(iv) 8 ÷ \(\frac{1}{2}\)
= 8 × \(\frac{2}{1}\)
= 16

(v) 1

Question 2.
Say True or False
(i) 3\(\frac{1}{2}\) can be written as 3 + \(\frac{1}{2}\).
(ii) The sum of any two proper fractions is always an improper fraction.
(iii) The mixed fraction of \(\frac{13}{4}\) is 3\(\frac{1}{4}\).
(iv) The reciprocal of an improper fraction is always a proper fraction.
(v) 3\(\frac{1}{4}\) × 3\(\frac{1}{4}\) = 9\(\frac{1}{16}\)
Solution:
(i) True
(ii) False
(iii) True
(iv) True
(v) False

Question 3.
Answer the following:
(i) Find the sum of \(\frac{1}{7}\) and \(\frac{3}{9}\).
(ii) What is the total of 3\(\frac{1}{3}\) and 4\(\frac{1}{6}\)?
(iii) Simplify: 1\(\frac{3}{5}\)+5\(\frac{4}{7}\).
(iv) Find the difference between \(\frac{8}{9}\) and \(\frac{2}{7}\)
(v) Subtract: 1\(\frac{3}{5}\) from 2\(\frac{1}{3}\).
(vi) Simplify: 7\(\frac{2}{7}\) – 3\(\frac{4}{21}\)
Solution:
(i) \(\frac{1}{7}\) + \(\frac{3}{9}\)
= \(\frac{9+21}{63}\) = \(\frac{30}{63}\) = \(\frac{10}{21}\)

Question 4.
Convert mixed fractions into improper fractions and vice versa:
(i) 3\(\frac{7}{18}\)
(ii) \(\frac{99}{7}\)
(iii) \(\frac{47}{6}\)
(iv) 12\(\frac{1}{9}\)
Solution:
(i) 3\(\frac{7}{18}\) = \(\frac{61}{18}\)
(ii) \(\frac{99}{7}\) = 14\(\frac{1}{7}\)
(iii) \(\frac{47}{6}\) = 7\(\frac{5}{6}\)
(iv) 12\(\frac{1}{9}\) = \(\frac{109}{9}\)

Question 5.
Multiply the following:
(i) \(\frac{2}{3}\) × 6
(ii) 8\(\frac{1}{3}\) × 5
(iii) \(\frac{3}{8}\) × \(\frac{4}{5}\)
(iv) 3\(\frac{5}{7}\) × 1\(\frac{1}{13}\)
Solution:
(i) \(\frac{2}{3}\) × 6 = 4

(ii) 8\(\frac{1}{3}\) × 5
= \(\frac{25}{3}\) × 5
= \(\frac{125}{3}\)
= 41\(\frac{2}{3}\)

(iii) \(\frac{3}{8}\) × \(\frac{4}{5}\)
= \(\frac{12}{40}\) = \(\frac{3}{10}\)

(iv) 3\(\frac{5}{7}\) × 1\(\frac{1}{13}\)
= \(\frac{26}{7}\) × \(\frac{14}{13}\)
= \(\frac{4}{1}\)
= 4

Question 6.
Divide the following
(i) \(\frac{3}{7}\) ÷ 4
(ii) \(\frac{4}{3}\) ÷ \(\frac{5}{9}\)
(iii) 4\(\frac{1}{5}\) ÷ 3\(\frac{3}{4}\)
(iv) 9\(\frac{2}{3}\) ÷ 1\(\frac{2}{3}\)
Solution:
(i) \(\frac{3}{7}\) ÷ 4
= \(\frac{3}{7}\) × \(\frac{1}{4}\) = \(\frac{3}{28}\)

(ii) \(\frac{4}{3}\) ÷ \(\frac{5}{9}\)
= \(\frac{4}{3}\) × \(\frac{9}{5}\)
= \(\frac{12}{5}\)
= 2\(\frac{2}{5}\)

Question 7.
Gowri purchased 3\(\frac{1}{2}\) kg of tomatoes, \(\frac{3}{4}\) kg of brinjal and 1\(\frac{1}{4}\) kg of onion. What is the total weight of the vegetables she bought?
Solution:
Total weight of vegetables bought

Question 8.
An oil tin contains 3\(\frac{3}{4}\) litres of oil of which 2\(\frac{1}{2}\) litres of oil is used. How much oil is left over?
Solution:

Question 9.
Nilavan can walk 4\(\frac{1}{2}\) km in an hour. How much distance will he cover in 3\(\frac{1}{2}\) hours?
Solution:
Distance walked in an hour = 4\(\frac{1}{2}\) km
Distance covered in 3\(\frac{1}{2}\)
Hours

Question 10.
Ravi bought a curtain of length 15\(\frac{3}{4}\) m. If he cut the curtain into small pieces each of length 2\(\frac{1}{4}\) m, then how many small curtains will he get?
Solution:
Total length = 15\(\frac{3}{4}\)
Length of the small pieces = 2\(\frac{1}{4}\)
Small curtains obtained

= 7

Objective Type Questions

Question 11.
Which of the following statement is incorrect?
(a) \(\frac{1}{2}\) > \(\frac{1}{3}\)
(b) \(\frac{7}{8}\) > \(\frac{6}{7}\)
(c) \(\frac{8}{9}\) < \(\frac{9}{10}\)
(d) \(\frac{10}{11}\) > \(\frac{9}{10}\)
Solution:
(d) \(\frac{10}{11}\) > \(\frac{9}{10}\)

Question 12.
The difference between \(\frac{3}{7}\) and \(\frac{2}{9}\) is
(a) \(\frac{13}{63}\)
(b) \(\frac{1}{9}\)
(c) \(\frac{1}{7}\)
(d) \(\frac{9}{16}\)
Solution:
(a) \(\frac{13}{63}\)

Question 13.
The reciprocal of \(\frac{53}{17}\) is
(a) \(\frac{53}{17}\)
(b) 5\(\frac{3}{17}\)
(c) \(\frac{17}{53}\)
(d) 3\(\frac{5}{17}\)
Solution:
(c) \(\frac{17}{53}\)

Question 14.
If \(\frac{6}{7}=\frac{\mathbf{A}}{49}\), then the value of A is
(a) 42
(b) 36
(c) 25
(d) 48
Solution:
(a) 42
Hint: \(\frac{6 \times 49}{7}=42\)

Question 15.
Pugazh has been given four choices for his pocket money by his father. Which of the choices should he take in order to get the maximum money?
(a) \(\frac{2}{3}\) of Rs 150
(b) \(\frac{3}{5}\) of Rs 150
(c) \(\frac{4}{5}\) of Rs 150
(d) \(\frac{1}{5}\) of Rs 150
Solution:
(c) \(\frac{4}{5}\) of Rs 150

Students can download Maths Chapter 5 Information Processing Ex 5.2 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 5 Information Processing Ex 5.2

Miscellaneous Practice Problems

Question 1.
Write the missing numbers in the trees.

Solution:

Question 2.
Write the missing operations in the trees.

Solution:

Question 3.
Check whether the Tree diagrams are equal or not.

Solution:
c ÷ (a ÷ b), a ÷ (b ÷ c) Not equal

Challenge Problems

Question 4.
Convert ti e following questions into tree diagrams:
(i) The number of people who visited a library in the last 5 months were 1210, 2100, 2550, 3160 and 3310. Draw the tree diagram of the total number of people who had used the library for the 5 months.
(ii) Ram had a bank deposit of Rs. 7,55,250 and he had withdrawn Rs. 5,34,500 for educational purpose. Find the amount left in his account. Draw a tree diagram for this.
(iii) In a cycle factory, 1,600 bicycles were manufactured on a day. Draw tree diagram to find the number of bicycle produced in 20 days.
(iv) A company with 30 employees decided to distribute Rs. 90, 000 as a special bonus equally among its employees. Draw tree diagram to show how much will each receive?
Solution:

Question 5.
Write the numerical expression which gives the answer 10 and also convert into tree diagram.
Solution:

Question 6.
Use brackets in appropriate place to the expression 3 x 8 – 5 which gives 19 and convert it into tree diagram for it.
Solution:

= 3 × 8 – 5
= (3 × 8) – 5 = 24 – 5
= 19

Question 7.
A football team gains 3 and 4 points for successive 2 days and loses 5 points on the third day. Find the total points scored by the team and also represent this in tree diagram.
Solution:

Students can download Maths Chapter 5 Information Processing Ex 5.1 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 5 Information Processing Ex 5.1

Question 1.
Convert the following numerical expressions into Tree diagrams
(i) 8 + (6 × 2)
(ii) 9 – (2 × 3)
(iii) (3 × 5) – (4 – 2)
(iv) [(2 × 4) + 2] × (8 – 2)]
(v) [(6 + 4) × 7] – [2 × (10 – 5)]
(vi) [(4 × 3) – 2] + [8 × (5 – 3)]
Solution:

Question 2.
Convert the following tree diagrams into numerical expressions.

Solution:
(i) The numerical Expression is 9 × 8
(ii) The numerical expression is (7 + 6) – 5
(iii) The numerical expression is (8 + 2) – (6 + 1)
(iv) The numerical expression is (5 × 6) – (10 ÷ 2)

Question 3.
Convert the following algebraic expressions into tree diagrams.
(i) 10 v
(ii) 3a – b
(iii) 5x + y
(iv) 20t × p
(v) 2(a + b)
(vi) (x × y) – (y × z)
(vii) 4x + 5y
(viii) (Im – n) ÷ (pq + r)
Solution:

Question 4.
Convert Tree diagrams into Algebraic expressions.

Solution:
(i) Algebraic Expression is p + q
(ii) Algebraic Expression is l – m
(iii) Algebraic Expression is (a × b) – c (or) (ab) – c
(iv) Algebraic Expression is (a + b) – (c + d)
(v) Algebraic Expression is (8 ÷ a) + [ (6 ÷ 4) + 3]

Students can download Maths Chapter 4 Geometry Ex 4.3 Questions and Answers, Notes, Samacheer Kalvi 6th Maths Guide Pdf helps you to revise the complete Tamilnadu State Board New Syllabus, helps students complete homework assignments and to score high marks in board exams.

Tamilnadu Samacheer Kalvi 6th Maths Solutions Term 2 Chapter 4 Geometry Ex 4.3

Miscellaneous Practice Problems

Question 1.
What are the angles of an isosceles right-angled triangle?
Solution:
Since it is a right-angled triangle
One of the angles is 90°
The other two angles are equal because it is an isosceles triangle.
The other two angles must be 45° and 45°
Angles are 90°, 45°, 45°.

Question 2.
Which of the following correctly describes the given triangle?

(a) It is a right isosceles triangle
(b) It is an acute isosceles triangle
(c) It is an obtuse isosceles triangle
(d) It is an obtuse scalene triangle
Solution:
(c) It is an obtuse isosceles triangle

Question 3.
Which of the following is not possible?
(a) An obtuse isosceles triangle.
(b) An acute isosceles triangle.
(c) An obtuse equilateral triangle.
(d) An acute equilateral triangle.
Solution:
(c) An obtuse equilateral triangle.

Question 4.
If one angle of an isosceles triangle is 124°, then find the other angles
Solution:
In an isosceles triangle, any two sides are equal. Also, the two angles are equal.
Sum of three angles of a triangle = 180°
Given one angle = 124°
Sum of other two angles = 180° – 124° = 56°
Other angles are = \(\frac{56}{2}\) = 28°
28° and 28°.

Question 5.
The diagram shows a square ABCD. If the line segment joins A and C, then mention the type of triangle so formed.
Solution:

Isosceles right-angled triangles

Question 6.
Draw a line segment AB of length 6 cm. At each end of this line segment AB, draw a line perpendicular to the line segment AB. Are these lines parallel?
Solution:

yes, they are parallel

Challenge Problems

Question 7.
Is a triangle possible with the angles 90°, 90°, and 0°, Why?
Solution:
No, a triangle cannot have more than one right angle.

Question 8.
Which of the following statements is true? Why?
(a) Every equilateral triangle is an isosceles triangle.
(b) Every isosceles triangle is an equilateral triangle
Solution:
“(a)” is true, because an isosceles triangle need not have three equal sides

Question 9.
If one angle of an isosceles triangle is 70°, then find the possibilities for the other two angles.
Solution:
(i) Given one angle = 70°
Also, it is an isosceles triangle.
Another one angle also can be 70°.
Sum of these two angles = 70° + 70° = 140°
We know that the sum of three angles in a triangle = 180°.
Third angle = 180° – 140° = 40°
One possibility is 70°, 70°, and 40°
(ii) Also if one angle is 70°
Sum of other two angles = 180° – 70° = 110°
Both are equal. They are \(\frac{110}{2}\) = 55°.
Another possibility is 70°, 55° and 55°.

Question 10.
Which of the following can be the sides of an isosceles triangle?
(a) 6 cm, 3 cm, 3 cm
(b) 5 cm, 2 cm, 2 cm
(c) 6 cm, 6 cm, 7 cm
(d) 4 cm, 4 cm, 8 cm
Solution:
(c) 6 cm, 6 cm, 7 cm

Question 11.
Study the given figure and identify the following triangles,

(a) equilateral triangle
(b) isosceles triangle
(c) scalene triangles
(d) acute triangle
(e) obtuse triangle
(f) right triangle
Solution:(a) BC = 1 + 1 + 1 + 1 = 4 cm
AB = AC = 4 cm
∆ABC is an equilateral triangle.
(b) ∆ABC and ∆AEF are isosceles triangles.
Since AB = AC = 4 cm Also AE = AF.
(c) In a scalene triangle, no two sides are equal.
∆AEB, ∆AED, ∆ADF, ∆AFC, ∆ABD, ∆ADC, ∆ABF, and ∆AEC are scalene triangles.
(d) In an acute-angled triangle all the three angles are less than 90°.
∆ABC, ∆AEF, ∆ABF, and ∆AEC are acute-angled triangles.
(e) In an obtuse-angled triangle any one of the angles is greater than 90°.
∆AEB and ∆AFC are obtuse angled triangles.
(f) In a right triangle, one of the angles is 90°.
∆ADB, ∆ADC, ∆ADE, and ∆ADF are right-angled triangles.

Question 12.
Two sides of the triangle are given in the table. Find the third side of the triangle.

Solution:
(i) between 3 and 11
(ii) between 0 and 16
(iii) between 4 and 11
(iv) between 4 and 24

Question 13.
Complete the following table:

Solution:
(i) Always acute angles
(ii) Acute angle
(iii) Obtuse angle