Samacheer Kalvi 5th Social Science Guide Term 1 Chapter 4 Atmosphere

Tamilnadu State Board New Syllabus Samacheer Kalvi 5th Social Science Guide Pdf Term 1 Chapter 4 Atmosphere Text Book Back Questions and Answers, Notes.

Tamilnadu Samacheer Kalvi 5th Social Science Solutions Term 1 Chapter 4 Atmosphere

Samacheer Kalvi 5th Social Science Guide Atmosphere Text Book Back Questions and Answers

Evaluation

I. Choose the best answer.

Question 1.
The atmosphere is divided ______ into layers.
(a) four
(b) five
(c) six
(d) seven
Answer:
(b) five

Question 2.
The Earth receives heat energy from the ______ .
(a) Moon
(b) Mars
(c) Sun
(d) Venus
Answer:
(c) Sun

Question 3.
World Meteorological Day
(a) March – 20
(b) March – 21
(c) March – 22
(d) March – 23
Answer:
(d) March – 23

Question 4.
The study of weather is called _______ .
(a) Meteorology
(b) Ecology
(c) Archaeology
(d) Sociology
Answer:
(a) Meteorology

Question 5.
Zone located in between Tropic cancer and Tropic of Capricorn is _______ zone.
(a) Temperate
(b) Subtropical
(c) Cold
(d) Torrid
Answer:
(d) Torrid

Question 6.
_______ is used to measure pressure in the air.
(a) Barometer
(b) Thermometer
(c) Anemometer
(d) Wind vane
Answer:
(a) Barometer

Question 7.
Monsoon is derived from the _______ word.
(a) Greek
(b) Arabian
(c) English
(d) Latin
Answer:
(b) Arabian

Question 8.
Vertical cloud is called _________ .
(a) Cirrus cloud
(b) Stratus clouds
(c) Cumulus clouds
(d) Nimbus clouds
Answer:
(d) Nimbus clouds

Question 9.
________ clouds give convectional rainfall.
(a) Cirrus
b) Stratus
(c) Cumulus
(d) Nimbus
Answer:
(c) Cumulus

Question 10.
Statement I – The instrument used to measure wind direction in wind vane.
Statement II – Light travels faster than sound.
(a) Statement I is True, II is False
(b) Statement I,II are True
(c) Statement I,II are False
(d) Statement I is False, II is True
Answer:
(b) Statement I,II are True

II. Fill in the blanks.

Question 1.
The instrument used to measure heat _______ .
Answer:
Calorimeter

Question 2.
The imaginary lines drawn parallel to the surface of the earth is _______ .
Answer:
Latitudes

Question 3.
Sea breeze blows from _______ in the evening.
Answer:
sea to land

Question 4.
_______ are rain clouds.
Answer:
Nimbus

III. Match the following

Answer:

1. (c)
2. (a)
3. (d)
4. (b)

IV. State True/ False.

Question 1.
All weather changes occur in the Troposphere.
Answer:
True

Question 2.
Latitudes and Longitudes help us to locate a country.
Answer:
True

Question 3.
Atmosphere gets heated by conduction than solar radiation.
Answer:
True

Question 4.
The main reason for the change of wind direction is to Earth’s rotation.
Answer:
True

Question 5.
Cyclone moves in anti-clockwise direction.
Answer:
True

V. Answer the following.

Question 1.
What is climate?
Answer:
The word climate is derived from the Greek word called clima. Climate is the average weather condition of a vast area over more than 30 years.

Question 2.
Name the atmospheric layers.
Answer:

• Troposphere
• Stratosphere
• Mesosphere
• Thermosphere
• Exosphere.

Question 3.
Write a short note on the Nimbus clouds.
Answer:
Nimbus clouds appears as dark or grey in color. It gives heavy rainfall. It’s called vertical or rain clouds.

Question 4.
Write a short note on the orographic rainfall.
Answer:
When the moisture laden winds from the sea rises as it moves over a mountain range, it becomes cool and causes heavy rainfall. The opposite side of the mountain is called Leeward side. It receives very little rainfall.

VI. Answer in detail:

Question 1.
Write about Jet Streams.
Answer:

• Air currents in the upper layers of atmosphere is known as Jet streams.
• It could determine the arrival and departure of monsoon winds in India.

Question 2.
Explain the types of winds.
Answer:
Wind:
The air moves horizontally from high pressure to low pressure area is called wind. :
Different types of wind
Planetary winds: These winds move in the same direction throughout the year with the rotation of the earth.

Monsoon winds: They are seasonal winds.
Types:

• South west monsoon winds.
• North east monsoon winds.
• Monsoon rains.

Sea breeze: Wind blows from sea to land during the evening.

Land breeze: Wind blows from land to sea in the morning.

InText Activity

Question 1.
Take a ball and throw it up in the air observe the increasing speed of the ball when it comes down.
Answer:
Activity to be done by the students themselves

Question 2.
Write the significance of gases.
Answer:
Oxygen – makes life possible on the Earth.
Carbondioxide – helps to retain warmth on the Earth.
Ozone – protects our earth from ultra violet rays.

Project:
Draw Heat Zones.
Answer:

Samacheer Kalvi 5th Social Science Guide Atmosphere Additional Questions and Answers

I. Choose the best answer.

Question 1.
The earth rotates on its axis once in
(a) 12
(b) 24
(c) 36
(d) 48
Answer:
(b) 24

Question 2.
Sunlight takes _______ minutes time to move 1°.
(a) 2
(b) 3.5
(c) 4
(d) 4.5
Answer:
(c) 4

Question 3.
The instrument used to measure the speed of the wind is
(a) Airmeter
(b) Thermometer
(c) Anemometer
(d) windmeter
Answer:
(c) Anemometer

II. Fill in the blanks.

Question 1.
__________ is the great circle at the centre of the earth.
Answer:
Equators

Question 2.
The 0° longitude is called ________ meridian.
Answer:
prime

Question 3.
The highest mountain in the world is __________ .
Answer:
Himalayas

Question 4.
__________ is the highest peak in the world.
Answer:
Mount Everest

Question 5.
__________ is the highest peak in the Nilgiri ranges.
Answer:
Doddabetta

Question 6.
The instrument used to measure the direction of wind is __________ .
Answer:
wind vane

Question 7.
__________ energy is a form of renewable energy.
Answer:
Wind

Question 8.
A generator can convert mechanical energy into __________ .
Answer:
electricity

Question 9.
The word monsoon is derived from the Arabic term.
Answer:
‘Mausim’

Question 10.
__________ blows from sea to land during the evening.
Answer:
Sea breeze

Question 11.
__________ blows from land to sea in the morning.
Answer:
Land breeze

III. Match the Following:

I.


Answer:

1. (c)
2. (d)
3. (b)
4. (a)

II.

Answer:

1. (e)
2. (d)
3. (a)
4. (b)
5. (c)

IV. True/ False.

Question 1.
Wind turbines converts the kinetic energy into electricity energy. T/F
Answer:
Flase

Question 2.
Local wind affects the weather. T/F
Answer:
True

Question 3.
Cumulus clouds are associated with rainfall lightning and thunder. T/F
Answer:
True

Question 4.
Condensation of the wind causes rain fall. T/F
Answer:
True

Question 5.
The warm air from the hot area is heated and moves downwards. T/F
Answer:
False

V. Write short note:

Question 1.
What is Biosphere?
Answer:
Biosphere is the combination of lithosphere, hydrosphere and atmosphere.

Question 2.
What is atmosphere?
Answer:
Atmosphere is the envelope of air around the Earth.

Question 3.
What are the types of heat zones?
Answer:
Frigid zone, Temperate zone, Torrid zone.

Question 4.
What is wind?
Answer:
The air which moves horizontally from high pressure to low pressure area is called wind.

Question 5.
What are the types of local wind?
Answer:

• Warm local wind – North West India
• Cool local wind – North East India

Question 6.
Explain about cyclone.
Answer:
Hurricane/cyclone changes its position and direction with time to time. The speed of winds also changes with time. It gives very heavy rainfall.

Question 7.
Explain Convectional Rain fall.
Answer:
During summer solar insolation takes place in land. Water evaporates from lakes, ponds and vegetations. Due to this a heavy rainfall with lightning and thunder occurs in the evening for a short period.

VI. Answer in detail:

Question 1.
Explain Loo wind.
Answer:
The ‘Loo’ is a strong, dusty, gusty, hot and dry summer wind from the west which blows over of North Western India. It is especially strong in the months of May and June. Due to it very high temperature, exposure to it often leads to fatal heatstrokes.

Question 2.
Explain the types of clouds.
Answer:
The clouds are composed of water vapour in the air. The clouds are divided into four categories on the basis of appearance and height. They are

1. Cirrus cloud
2. Stratus cloud
3. Cumulus cloud
4. Nimbus cloud

1. Cirrus cloud: These clouds appears like a silver grey fish at a very high altitude in the sky. These may not give rain.

2. Stratus cloud: They are grey in colour and are spreadout. They may give small shower.

3. Cumulus cloud: It looks like a burst cotton and gives convectional rainfall. These clouds are associated with rainfall lightning and thunder.

4. Nimbus cloud: It appears as dark or grey in color. It gives heavy rainfall. It is called vertical or rain clouds.

Question 3.
Write about ‘weather factory’.
Answer:
When the clouds of positive and negative (+, -) charge hit each other, lightning and thunder are produced. Light travels faster than sound, therefore thunder follows lightning. When all the characteristics together activate at same time it is called weather factory.