ESS
Grade-9
Easy
Question
Greenhouse effect is because of ______________.
- Increase of ozone and depletion of CO2
- Accumulation of ozone as well as CO2
- Accumulation of CO2 and depletion of ozone
- Presence of green plants on the planet
Hint:
CO2 accumulated from burning of fossil fuels, normal respiration of animals and less plants to replenish it with O2 causes global warming
The correct answer is: Accumulation of CO2 and depletion of ozone
Ozone depletion is caused due to formation of free chlorine on breakdown of CFCs released from widely used ACs and refrigerators. This free chlorine reacts with ozone in the stratosphere and depletes it to form ozone hole
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___________is not a greenhouse gas.
___________is not a greenhouse gas.
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Statement I: The global atmosphere is currently warming.
Statement II: The depletion of the stratospheric ozone layer has increased the amount of ultraviolet radiation reaching the earth.
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Statement II: The depletion of the stratospheric ozone layer has increased the amount of ultraviolet radiation reaching the earth.
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Match the following.
| 1. Carbon dioxide |
a. Hydrocarbon |
| 2. Methane |
b. Major component of climate change |
| 3. Carbon monoxide |
c. It’s a poisonous gas |
| 4. Carbon fluorocarbon |
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Match the following.
| 1. Carbon dioxide |
a. Hydrocarbon |
| 2. Methane |
b. Major component of climate change |
| 3. Carbon monoxide |
c. It’s a poisonous gas |
| 4. Carbon fluorocarbon |
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Reason [R]: Moreover, CO2, methane and CFCs are also greenhouse gases.
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Reason [R]: Moreover, CO2, methane and CFCs are also greenhouse gases.
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The spatial coverage of sea ice will decrease as carbon dioxide levels rise. As a result, the reduced sea ice extent is a ________.
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