Text Book Back Questions and Answers - Chapter 4 Atmosphere Term 1 5th Social Guide Samacheer Kalvi Solutions - SaraNextGen [2024-2025]

Updated On May 15, 2024

By SaraNextGen

Chapter 4 - Atmosphere - Term 1 - 5th Social Guide Samacheer Kalvi Solutions- Text Book Back Questions and Answers

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:

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 $1^{\circ}$.
(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 $0^{\circ}$ 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:

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

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. $\mathrm{T} / \mathrm{F}$
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.