Chapter Exam

Chapter 3: Atmosphere and Climate — Online MCQ Test

Q: What is the layer of air surrounding the Earth called?

Answer: B. Atmosphere — The atmosphere is the envelope of gases surrounding the Earth. It supports life and influences weather and climate.

Q: Which of the following is the main source of heat and energy for the Earth?

Answer: B. The Sun — Solar radiation from the Sun is the primary source of energy for heating the Earth and driving weather processes.

SOCIAL · Grade 9 · CBSE(NCERT)

Practice Chapter 3: Atmosphere and Climate with a free chapter-wise online MCQ test for CBSE(NCERT) Grade 9 SOCIAL. This chapter covers: Atmosphere Climate Weather Solar radiation Air pressure Wind belts Moisture Monsoon Temperature Humidity Rainfall Climate zones. AI-generated questions from basic to board-exam level, with instant results and explanations.

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Chapter 3: Atmosphere and Climate — Important Questions & Answers (FAQ)

Frequently asked questions from CBSE(NCERT) Grade 9 SOCIAL — Chapter 3: Atmosphere and Climate, with answers and explanations. These are sample questions; the exam has its own separate question set.

What is the layer of air surrounding the Earth called?

A. Hydrosphere
B. Atmosphere ✓
C. Lithosphere
D. Biosphere

Answer: B. Atmosphere
The atmosphere is the envelope of gases surrounding the Earth. It supports life and influences weather and climate.

Which of the following is the main source of heat and energy for the Earth?

A. The Moon
B. The Sun ✓
C. The stars
D. The Earth’s core

Answer: B. The Sun
Solar radiation from the Sun is the primary source of energy for heating the Earth and driving weather processes.

Why does temperature generally decrease with increasing altitude in the troposphere?

A. Air becomes denser higher up and stores more heat
B. The atmosphere is heated mainly from below by the Earth’s surface ✓
C. Solar radiation is stronger at greater heights
D. Wind speed always reduces temperature with height

Answer: B. The atmosphere is heated mainly from below by the Earth’s surface
The Earth’s surface absorbs solar energy and then heats the air above it. Therefore, temperature usually falls as altitude increases.

A coastal city and an inland city lie at the same latitude. The coastal city has a more moderate climate. What is the best reason?

A. Sea water heats and cools faster than land
B. Sea water moderates temperature because it heats and cools slowly ✓
C. Coastal areas always get more sunlight
D. Inland areas receive no humidity

Answer: B. Sea water moderates temperature because it heats and cools slowly
The sea heats up and cools down more slowly than land, so coastal places experience less extreme temperatures. This produces a more moderate climate.

Which of the following is the best reason why deserts are generally located around 30° latitude north and south?

A. These regions receive the strongest monsoon winds
B. They lie under subtropical high-pressure belts where air descends and becomes dry ✓
C. They are near the equator and receive maximum rainfall
D. They are areas of permanent low pressure

Answer: B. They lie under subtropical high-pressure belts where air descends and becomes dry
Descending air in the subtropical high-pressure belts becomes dry and limits cloud formation. This is why many deserts are found near 30° latitude.