Chapter 6: Atmosphere — Online MCQ Test
GEOGRAPHY · CLASS 11th · Tamil Nadu State Board
Practice Chapter 6: Atmosphere with a free chapter-wise online MCQ test.
This chapter covers: This chapter details atmospheric composition layers insolation heat budget temperature distribution and atmospheric pressure belts. Students analyze wind systems humidity cloud typ....
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Chapter 6: Atmosphere — Important Questions & Answers
Which gas constitutes the highest percentage by volume in the Earth's atmosphere?
- A. Oxygen
- B. Nitrogen
- C. Argon
- D. Carbon dioxide
Answer: B. Nitrogen
Nitrogen makes up approximately 78% of the Earth's atmosphere.
Nitrogen makes up approximately 78% of the Earth's atmosphere.
In which layer of the atmosphere do most weather phenomena occur?
- A. Stratosphere
- B. Mesosphere
- C. Troposphere
- D. Thermosphere
Answer: C. Troposphere
The troposphere is the lowest layer where temperature decreases with height and most weather changes occur.
The troposphere is the lowest layer where temperature decreases with height and most weather changes occur.
Which of the following describes the 'Heat Budget' of the Earth?
- A. The balance between incoming solar radiation and outgoing terrestrial radiation.
- B. The amount of heat trapped by greenhouse gases.
- C. The process of conduction in the soil.
- D. The total heat generated by volcanic activity.
Answer: A. The balance between incoming solar radiation and outgoing terrestrial radiation.
The heat budget maintains the Earth's constant average temperature through a balance of energy gain and loss.
The heat budget maintains the Earth's constant average temperature through a balance of energy gain and loss.
If the earth did not rotate, what would be the primary direction of global winds?
- A. Directly from poles to the equator
- B. East to West
- C. Spiral motions in all regions
- D. Only circular patterns
Answer: A. Directly from poles to the equator
Without the Coriolis force generated by rotation, air would flow directly from high pressure to low pressure.
Without the Coriolis force generated by rotation, air would flow directly from high pressure to low pressure.
Which of the following combinations correctly identifies the lapse rate and its effect?
- A. Normal Lapse Rate: 6.5C per 1000m; leads to cooling.
- B. Normal Lapse Rate: 10C per 1000m; leads to warming.
- C. Environmental Lapse Rate: 1C per 100m; affects only ozone.
- D. Adiabatic Lapse Rate: constant; unrelated to height.
Answer: A. Normal Lapse Rate: 6.5C per 1000m; leads to cooling.
The normal lapse rate is the average rate at which temperature decreases with altitude in the troposphere.
The normal lapse rate is the average rate at which temperature decreases with altitude in the troposphere.