Composition, structure, greenhouse effect Quiz - ICSE Class 7 Geography

Free practice quiz: Composition, structure, greenhouse effect (ICSE Class 7 Geography). 44 multiple-choice questions with answers and explanations. Play online, no sign-up needed.

This ICSE Class 7 Geography practice quiz has 44 multiple-choice questions on Composition, structure, greenhouse effect, and 44 of them come with an explanation. Try the 5 sample questions below (tap an option to check yourself), then play the full quiz online. No sign-up needed.

Sample questions

1. Which layer of the Earth's atmosphere contains the ozone layer, crucial for absorbing ultraviolet (UV) radiation from the sun?

   1. Troposphere
   2. Stratosphere
   3. Mesosphere
   4. Thermosphere
   Show answer

   Answer: B. Stratosphere

   The ozone layer is primarily located in the stratosphere, which absorbs most of the Sun's harmful ultraviolet radiation, protecting life on Earth.

2. The process by which the Earth's surface absorbs solar energy and then radiates it back as infrared heat is fundamental to the greenhouse effect. This re-radiated heat is then trapped by greenhouse gases. Which type of radiation is primarily trapped by greenhouse gases?

   1. Visible light
   2. Ultraviolet radiation
   3. Infrared radiation
   4. X-rays
   Show answer

   Answer: C. Infrared radiation

   Greenhouse gases are transparent to most incoming visible sunlight but are effective at absorbing and re-emitting the outgoing infrared radiation (heat) emitted by the Earth's surface, thus trapping heat in the atmosphere.

3. The atmospheric layer where meteors typically burn up due to friction is the:

   1. Stratosphere
   2. Mesosphere
   3. Thermosphere
   4. Exosphere
   Show answer

   Answer: B. Mesosphere

   The mesosphere is the coldest layer of the atmosphere. It is dense enough to cause friction with incoming meteors, causing them to burn up and create visible streaks of light (shooting stars).

4. Which gas is a significant greenhouse gas and a major component of natural gas, often released from livestock and rice cultivation?

   1. Carbon Dioxide (CO2)
   2. Nitrous Oxide (N2O)
   3. Methane (CH4)
   4. Water Vapor (H2O)
   Show answer

   Answer: C. Methane (CH4)

   Methane is a potent greenhouse gas. While it is a smaller component of the atmosphere than carbon dioxide, its heat-trapping ability per molecule is much higher. It is produced by natural processes like decomposition in anaerobic conditions and by human activities.

5. Which gas is responsible for the majority of the atmospheric mass?

   1. Oxygen
   2. Carbon Dioxide
   3. Nitrogen
   4. Water Vapor
   Show answer

   Answer: C. Nitrogen

   Nitrogen, at 78% of the atmosphere, contributes the most to its mass.

More questions in this quiz

Answers and explanations are in the full quiz.

1. The phenomenon where certain gases in the atmosphere trap heat, warming the planet, is known as:
2. The lowest layer of the Earth's atmosphere, where weather phenomena occur, is the:
3. As altitude increases within the troposphere, temperature generally:
4. What is the main reason for the temperature inversion observed in the stratosphere?
5. Which atmospheric layer is responsible for reflecting radio waves back to Earth, enabling long-distance communication?
6. The mesosphere is characterized by its extremely low temperatures. What is the primary reason for this?
7. Which of the following gases is NOT considered a major greenhouse gas?
8. Which component of the atmosphere is responsible for scattering sunlight, causing the blue color of the sky?
9. The thermosphere is known for its extremely high temperatures. What causes these high temperatures?
10. Which gas is the second most abundant in Earth's atmosphere and is crucial for respiration?
11. The outermost layer of Earth's atmosphere, extending outwards into space, is the:
12. The greenhouse effect is a natural process that keeps the Earth warm enough to support life. However, an increase in the concentration of greenhouse gases can lead to:
13. Which of the following is NOT a direct consequence of the greenhouse effect?
14. The composition of Earth's atmosphere remains relatively stable due to:
15. Which of the following is the primary source of atmospheric oxygen?
16. Which term describes the decrease in temperature with increasing altitude in the troposphere?
17. The ionosphere, a region within the thermosphere, is characterized by:
18. Which of the following is NOT a greenhouse gas?
19. The stratosphere is important because it contains the ozone layer. What is the main function of the ozone layer?
20. The 'greenhouse effect' refers to the trapping of heat in the Earth's atmosphere by certain gases. Which of the following correctly describes what happens to incoming solar radiation as it interacts with the Earth and its atmosphere?
21. Which of the following atmospheric layers has the highest temperature due to the absorption of high-energy solar radiation?
22. The percentage of Nitrogen in the Earth's atmosphere is approximately:
23. What causes the temperature to decrease with altitude in the troposphere?
24. The boundary between the stratosphere and the mesosphere is called the:
25. Which gas contributes to the greenhouse effect primarily by absorbing outgoing infrared radiation emitted from the Earth's surface?
26. What causes the temperature to increase with altitude in the stratosphere?
27. Which atmospheric layer is the coldest, where meteors typically burn up?
28. Water vapor is the most abundant greenhouse gas. Its concentration in the atmosphere:
29. Which of the following is a trace gas, present in very small amounts, but a powerful greenhouse gas?
30. The exosphere is characterized by:
31. The greenhouse effect is crucial for life on Earth because it:
32. In the context of the greenhouse effect, what is the term for radiation emitted by the Earth's surface that is absorbed and re-emitted by greenhouse gases?
33. Which of the following is NOT a layer of the Earth's atmosphere?
34. The phenomenon of temperature increasing with altitude in the stratosphere is directly linked to the presence and function of which gas?
35. The lowest part of the atmosphere, where most of the Earth's weather occurs and where temperature generally decreases with altitude, is the:
36. What is the primary source of energy that drives the Earth's atmospheric processes?
37. The greenhouse effect is essential for maintaining a habitable temperature on Earth. Which of the following gases is the most abundant greenhouse gas in the atmosphere?
38. The uppermost layer of the atmosphere, where the air is extremely thin and gradually merges into outer space, is known as the:
39. What process is responsible for the phenomenon known as the 'greenhouse effect'?

Browse all Atmosphere quizzes

More to play