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Atmosphere and Climate
Social Science (2026-27) · CBSE Class 9 · English Medium · 39 questions and answers
Sample questions
- Q: What is the atmosphere?
- A: The atmosphere is the blanket of air surrounding the Earth, held by gravity, which supports life and controls weather and climate.
- Q: Which two gases make up most of the atmosphere?
- A: Nitrogen (about 78%) and oxygen (about 21%).
- Q: Name the five layers of the atmosphere in order from the surface.
- A: Troposphere, stratosphere, mesosphere, thermosphere and exosphere.
- Q: Why is the troposphere important?
- A: It is the lowest layer where we live; it contains most of the air, water vapour and clouds, and all weather occurs here.
- Q: Why are aeroplanes usually flown in the stratosphere?
- A: The stratosphere is mostly free of clouds and weather disturbances, so flying is smooth; it also contains the ozone layer.
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