Chapter 5: Atmosphere — Online MCQ Test
GEOGRAPHY · CLASS 11 FIRST PUC · Karnataka State Board
Practice Chapter 5: Atmosphere with a free chapter-wise online MCQ test.
This chapter covers: This chapter covers atmospheric structure troposphere stratosphere layers temperature distribution pressure belts wind systems monsoon mechanics rainfall types and weather vs clima....
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Chapter 5: Atmosphere — Important Questions & Answers
Which layer of the atmosphere contains most of the weather phenomena like clouds, rain, and storms?
- A. Stratosphere
- B. Troposphere
- C. Mesosphere
- D. Thermosphere
Answer: B. Troposphere
The troposphere is the lowest layer of the atmosphere and contains most water vapour and dust, so almost all weather changes occur here.
The troposphere is the lowest layer of the atmosphere and contains most water vapour and dust, so almost all weather changes occur here.
What is the normal lapse rate in the troposphere?
- A. 6.5°C per 1000 m
- B. 10°C per 1000 m
- C. 1°C per 1000 m
- D. 0.5°C per 1000 m
Answer: A. 6.5°C per 1000 m
The temperature generally decreases with height in the troposphere at an average rate of 6.5°C per 1000 metres.
The temperature generally decreases with height in the troposphere at an average rate of 6.5°C per 1000 metres.
In the tropics, why is the troposphere generally thicker than at the poles?
- A. Because air pressure is higher in the tropics
- B. Because of stronger heating and more vigorous convection
- C. Because ozone concentration is higher
- D. Because the Earth rotates faster there
Answer: B. Because of stronger heating and more vigorous convection
Intense heating near the equator causes stronger convection currents, which makes the troposphere thicker in tropical regions.
Intense heating near the equator causes stronger convection currents, which makes the troposphere thicker in tropical regions.
At the equator, low pressure generally develops because of:
- A. Cold descending air and weak solar radiation
- B. Strong heating causing air to rise
- C. Permanent dryness and high altitude
- D. Polar easterlies converging there
Answer: B. Strong heating causing air to rise
Intense solar heating at the equator warms the air, making it lighter and causing it to rise and create low pressure.
Intense solar heating at the equator warms the air, making it lighter and causing it to rise and create low pressure.
Which statement about monsoon winds is most accurate?
- A. They are permanent winds blowing in the same direction throughout the year
- B. They reverse direction seasonally due to differential heating of land and sea
- C. They are caused only by the rotation of Earth
- D. They blow only over deserts
Answer: B. They reverse direction seasonally due to differential heating of land and sea
Monsoon winds are seasonal winds that reverse direction because land and sea heat and cool at different rates, creating seasonal pressure changes.
Monsoon winds are seasonal winds that reverse direction because land and sea heat and cool at different rates, creating seasonal pressure changes.