alleryAt about what altitude does ozone reach its peak concentration?
- 32 km
- 80 km
- 50 km
- 12 km
Show answer and solution
Correct answer: A. 32 km
Ozone peaks at about 32 km, inside the stratosphere, at 15 parts per million.
CBSE Class 9 Climate and Geography — practice questions — page 4
Explore 109 free Climate and Geography questions in CBSE Class 9 Social Science. Open each question or exercise to read its content, reference answers and available explanation.
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Showing questions 91–109 of 109.
At about what altitude does ozone reach its peak concentration?Read the answer and worked solution →Which layer of the atmosphere is ionized by solar radiation?Read the answer and worked solution →Which phenomenon is linked with the ionosphere?Read the answer and worked solution →What happens to air pressure and density as altitude increases?Read the answer and worked solution →Up to roughly what altitude does turbulence keep atmospheric gases well mixed?Read the answer and worked solution →Which three gases are the major constituents of Earth's atmosphere?Read the answer and worked solution →What do humid, unstable air masses over the Bay of Bengal in summer develop into?Read the answer and worked solution →Which winds steer western disturbances towards the Himalayas?Read the answer and worked solution →At about what altitude does the mesosphere begin, at the stratopause?Read the answer and worked solution →Large regions where certain plants and animals live under similar climatic conditions are called what?Read the answer and worked solution →In which kind of climate do tropical rainforests grow, near the Equator?Read the answer and worked solution →Why are tropical rainforests called a 'gene bank'?Read the answer and worked solution →Grasslands develop mainly in areas receiving which amount of rainfall?Read the answer and worked solution →Which name is given to tropical grasslands with scattered trees, as seen in Africa?Read the answer and worked solution →The Sahara is a hot desert. Which of these is a cold desert?Read the answer and worked solution →The Rann of Kutch turns into a marshy wetland during which season?Read the answer and worked solution →What name is given to soil that stays frozen almost all year in the tundra?Read the answer and worked solution →About how much of the Earth's surface do aquatic biomes cover?Read the answer and worked solution →How do oceans and seas influence the Earth's climate?Read the answer and worked solution →
Worked practice questions
Which layer of the atmosphere is ionized by solar radiation?
- Barosphere
- Ionosphere
- Homosphere
- Heterosphere
Show answer and solution
Correct answer: B. Ionosphere
Solar radiation ionizes this region, which is why it supports auroras and airglow.
Which phenomenon is linked with the ionosphere?
- Earthquakes
- Tides
- Auroras
- Rainbows
Show answer and solution
Correct answer: C. Auroras
The ionosphere plays a significant role in auroras, airglow and space weather.
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