Atmosphere and Climate Class 9 MCQ with Answers SST Chapter 3 - #NCSOLVE 📚

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Class 9 SST Chapter 3 Atmosphere and Climate MCQ

MCQ on Atmosphere and Climate Class 9

Atmosphere and Climate MCQ Class 9

Question 1.
Which gas forms the largest part of the Earth’s atmosphere?
(a) Oxygen
(b) Carbon Dioxide
(c) Nitrogen
(d) Argon
Answer:
(c) Nitrogen

Question 2.
In which layer of the atmosphere do nearly all weather phenomena occur?
(a) Stratosphere
(b) Troposphere
(c) Mesosphere
(d) Thermosphere
Answer:
(b) Troposphere

Question 3.
The ozone layer is found in the:
(a) Troposphere
(b) Mesosphere
(c) Stratosphere
(d) Exosphere
Answer:
(c) Stratosphere

Question 4.
Aeroplanes generally fly in the:
(a) Troposphere
(b) Stratosphere
(c) Mesosphere
(d) Exosphere
Answer:
(b) Stratosphere

Question 5.
The seasonal reversal of winds is called:
(a) Cyclone
(b) Monsoon
(c) Breeze
(d) Storm
Answer:
(b) Monsoon

Question 6.
Which region receives most of its rainfall from the retreating monsoon?
(a) Delhi
(b) Mumbai
(c) Tamil Nadu
(d) Jodhpur
Answer:
(c) Tamil Nadu

Question 7.
Insolation refers to:
(a) Heat from the Earth’s interior
(b) Solar energy received by the Earth
(c) Rainfall received by an area
(d) Wind movement in the atmosphere
Answer:
(b) Solar energy received by the Earth

Question 8.
Which season in India brings most of the annual rainfall?
(a) Winter Season
(b) Summer Season
(c) South-West Monsoon Season
(d) Retreating Monsoon Season
Answer:
(c) South-West Monsoon Season

Question 9.
A carbon footprint refers to:
(a) The amount of rainfall received by a place
(b) The urea covered by forests
(c) The total greenhouse gases released by human activities
(d) The amount of oxygen in the atmosphere
Answer:
(c) The total greenhouse gases released by human activities

Question 10.
Which of the following helps reduce our carbon footprint?
(a) Excessive use of private vehicles
(b) Wasting electricity
(c) Planting more trees
(d) Burning more fossil fuels
Answer:
(c) Planting more trees

Question 11.
When precipitation falls on the Earth in liquid form, it is called:
(a) Snow
(b) Sleet
(c) Rain
(d) Hail
Answer:
(c) Rain

Question 12.
Which of the following is a greenhouse gas?
(a) Nitrogen
(b) Oxygen
(c) Carbon dioxide
(d) Argon
Answer:
(c) Carbon dioxide

Question 13.
The force exerted by the air on our bodies is known as:
(a) Wind pressure
(b) Atmospheric pressure
(c) Water pressure
(d) Gravitational force
Answer:
(b) Atmospheric pressure

Question 14.
The retreating monsoon mainly affects:
(a) Punjab
(b) Rajasthan
(c) Gujarat
(d) Tamil Nadu
Answer:
(d) Tamil Nadu

Question 15.
Which factor is mainly responsible for differences in climate from place to place?
(a) Latitude and altitude
(b) Festivals
(c) Population
(d) Language
Answer:
(a) Latitude and altitude

Atmosphere and Climate Class 9 Assertion and Reasoning Questions

Two statements are given – Assertion (A) and Reason (R). Read them carefully and choose the correct option.

Question 1.
Assertion (A): The ozone layer is very important for life on Earth.
Reason (R): It absorbs most of the harmful ultraviolet (UV) rays coming from the Sun.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Explanation: The ozone layer, located in the stratosphere, acts as a protective shield by absorbing harmful UV radiation. Without it, living organisms would be exposed to dangerous levels of radiation, making life on Earth difficult.

Question 2.
Assertion (A): Aeroplanes usually fly in the stratosphere.
Reason (R): The stratosphere has stable weather conditions and less turbulence.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Explanation: The troposphere contains clouds, storms, and changing weather conditions. The stratosphere is comparatively calm and stable, allowing aircraft to fly more safely and efficiently.

Question 3.
Assertion (A): Mission Mausam benefits only the agricultural sector.
Reason (R): It provides weather and climate information for agriculture, disaster management and rural development.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(d) (A) is false, but (R) is true.
Explanation: The assertion is false because Mission Mausam serves multiple sectors, including agriculture, disaster management, and rural development. The reason is true as it correctly describes the mission’s scope.

Question 4.
Assertion (A): Temperature decreases with increasing altitude.
Reason (R): Air becomes thinner at higher altitudes.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Explanation: Thin air absorbs and retains less heat, causing temperatures to decrease with altitude.

Question 5.
Assertion (A): The Punjab floods disrupted normal life.
Reason (R): Thousands of people had to leave their homes and move to relief camps for safety.
Codes:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
(b) Both (A) and (R) are true, but (R) is not the correct explanation of (A).
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.
Answer:
(a) Both (A) and (R) are true, and (R) is the correct explanation of (A).
Explanation: Both the assertion and the reason are true. Thousands of people were displaced and had to move to relief camps, disrupting their daily lives and normal activities. Therefore, the reason correctly explains the assertion.

Atmosphere and Climate Class 9 Fill in the Blanks

Question 1.
The blanket of gases surrounding the Earth is called the ___________
Answer:
Atmosphere

Question 2.
The atmosphere is held around the Earth by ___________
Answer:
Gravity

Question 3.
The transition zone between the troposphere and the stratosphere is called the ___________
Answer:
Tropopause

Question 4.
The ___________ layer protects the Earth from harmful ultraviolet rays.
Answer:
Ozone

Question 5.
Solar energy received by the Earth is known as ___________
Answer:
Insolation

Question 6.
The colourful lights seen near the poles are called ___________
Answer:
Auroras

Question 7.
Aeroplanes usually fly in the ___________
Answer:
Stratosphere

Question 8.
The South-West Monsoon generally occurs from ___________ to ___________
Answer:
June, September

Question 9.
The amount of water vapour in the air is known as ___________
Answer:
Humidity

Question 10.
Planting more trees helps reduce the amount of ___________ in the atmosphere.
Answer:
Carbon Dioxide

Question 11.
We do not feel the pressure of the air because it presses on us from all __________
Answer:
sides

Question 12.
The amount of heat received by the Earth decreases from the Equator towards the __________
Answer:
poles

Question 13.
The withdrawal of monsoon winds is known as the __________ monsoon.
Answer:
retreating

Question 14.
Pleasant or breezy weather may make a person feel ___________
Answer:
cheerful

Question 15.
Climate is generally studied over a period of ________ years or more.
Answer:
thirty

Atmosphere and Climate Class 9 True or False

Question 1.
The atmosphere is made up only of oxygen.
Answer:
False
Reason: The atmosphere contains many gases. Nitrogen forms about 78% of the atmosphere, oxygen about 21%, and the remaining portion consists of other gases such as argon and carbon dioxide.

Question 2.
Most meteorites bum up in the mesosphere.
Answer:
True

Question 3.
Varahamihira predicted seasonal rainfall using the movement of rivers.
Answer:
False
Reason: He used lunar mansions (nakshatras).

Question 4.
The National Monsoon Mission aims to improve monsoon predictions for India.
Answer:
True

Question 5.
Kalidasa’s Meghadutam describes the winter monsoon over southern India.
Answer:
False
Reason: It mentions the onset of the monsoon over Central India.

Question 6.
The exosphere is the lowest layer of the atmosphere.
Answer:
False
Reason: The troposphere is the lowest layer, while the exosphere is the outermost layer.

Question 7.
Altitude affcts the temperature of a place.
Answer:
True
Reason: Temperature generally decreases with an increase in altitude.

Question 8.
The North-East Monsoon brings rainfall to most parts of India.
Answer:
False
Reason: The North-East Monsoon does not bring rainfall to most part of India. The South-West Monsoon does.

Question 9.
Monsoon winds bring moisture from the oceans.
Answer:
True
Reason: These winds carry moisture and cause rainfall over land.

Question 10.
Deforestation can increase climate change.
Answer:
True
Reason: Cutting trees reduces carbon absorption and increases greenhouse gases.

Atmosphere and Climate Class 9 Match the Following

Question 1.

Column A	Column B
(A) Burning of fossil fuels	(i) Left people unprepared
(B) Late flood warnings	(ii) Colourful display of light near the poles
(C) Aurora	(iii) Releases greenhouse gases
(D) Weather	(iv) Long period of time
(E) Climate	(v) Hour-to-hour and day-to-day conditions

Choose the correct option:
(a) A – (v), B – (iii), C – (iv), D – (ii), E – (i)
(b) A – (iii), B – (i), C – (ii), D – (v), E – (iv)
(c) A – (i), B – (iv), C – (v), D – (ii), E – (iii)
(d) A – (iv), B – (i), C – (v), D – (iii), E – (ii)
Answer:
(b) A – (iii), B – (i), C – (ii), D – (v), E – (iv)

Column A	Column B
(A) Burning of fossil fuels	(iii) Releases greenhouse gases
(B) Late flood warnings	(i) Left people unprepared
(C) Aurora	(ii) Colourful display of light near the poles
(D) Weather	(v) Hour-to-hour and day-to-day conditions
(E) Climate	(iv) Long period of time

Question 2.

Column A	Column B
(A) Post-monsoon	(i) Retreating Monsoon Rainfall
(B) IMD	(ii) Cloudless weather in northwestern India
(C) Ozone Layer	(iii) Experienced in temperate regions
(D) Autumn and spring	(iv) Recognised four distinct seasons
(E) South-West Monsoon	(v) Absorbs harmful UV rays

Choose the correct option:
(a) A – (ii), B – (i), C – (iv), D – (v), E – (iii)
(b) A – (iv), B – (ii), C – (iii), D – (v), E – (i)
(c) A – (ii), B – (iv), C – (v), D – (iii), E – (i)
(d) A – (iv), B – (ii), C – (i), D – (v), E – (iii)
Answer:
(c) A – (ii), B – (iv), C – (v), D – (iii), E – (i)

Column A	Column B
(A) Post-monsoon	(ii) Cloudless weather in northwestern India
(B) IMD	(iv) Recognised four distinct seasons
(C) Ozone Layer	(v) Absorbs harmful UV rays
(D) Autumn and spring	(iii) Experienced in temperate regions
(E) South-West Monsoon	(i) Retreating Monsoon Rainfall

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