Global Warming

Q.

Which gases cause global warming?

Q.

What is global warming ? Name the gas which is responsible for causing global warming.

Q.

Global warming is the rise in the average temperatures of the earth. This is caused due to the presence of greenhouse gases.
Which greenhouse gas contributes the most to global warming?

1. Ozone

2. Carbon dioxide
3. Sulphur dioxide
4. Oxygen

Q.

Question 9
Prepare a brief speech on global warming. You have to deliver the speech in your class.

Q.

5 (a) Discuss harmful effects of the greenhouse effect.

Q.

Green-house effect is the phenomenon in which heat-

1. energy is not absorbed by the earth's surface into the core
2. energy is absorbed by the plants to make food
3. from the sun is absorbed by green-house gases and is re-radiated.
4. from the sun is absorbed by plants and passed on to the biosphere

Q.

What are global warming and the greenhouse effect?

Q.

Burning of fossil fuels and deforestation results in rise of the amount of $C{O}_2$ in the atmosphere.

1. False

2. True

Q.

14. Which of the following pairs is a major contributor to global warming?

1. carbon dioxide, nitrogen oxide

2. methane, water vapor

3. carbon dioxide, ozone

4. carbon dioxide, water vapor

Q. Enhanced greenhouse effect leads to:

1. Climate change
2. Global warming
3. Restoration of polar ice caps
4. Rise in sea levels

Q.

The major source(s) of carbon for living things is

1. Coal, oil and natural gas

2. Plants

3. CO₂ in the atmosphere and oceans

4. Methane in the atmosphere

Q.

what is ozone depletion

Q.

Glaciers and ice sheets present on poles of earth contain the solid form of water. True or False?

1. True
2. False

Q.

When the carbon dioxide is increased it increases the earths temperature. Explain

Q.

__ emission is mainly responsible for global warming.

Q.

Which of these following statement is the correct meaning of the term 'global warming'?

1. Slow and steady rise in the earth's surface temperature

2. Rapid rise in the earth's surface temperature

3. Rapid decrease in the earth's surface temperature

4. Slow and steady decrease in the earth's surface temperature

Q. Write two main causes of global warming.

Q.

Is deforestation associated with global warming? Explain

Q.

__ is the slow rise in the earth's temperature.

Q.

Which of the following steps will lead to a decrease in CO₂ levels in air?

1. Afforestation

2. Deforestation

3. Replacing LPG by coal in the kitchen

4. Increased use of wood as domestic fuel.

Q.

Define Global Warming, mention two causes for it.

Q.

Explain the effect of global warming.

Q.

What will happen if.

A)we go on cutting trees

B) the habitat of an animal is disturbed

C) the top layer of soil is exposed.

Answer elaborately.

Q.

Which of these following statement correctly defines 'global warming'?

1. Slow and steady decrease in the earth's surface temperature.

2. Rapid decrease in the earth's surface temperature.

3. Slow and steady rise in the earth's surface temperature.

4. Rapid rise in the earth's surface temperature.

Q.

The increase in global temperature due to the presence of air pollutants is called …………. ………………

Q.

Describe greenhouse effect. [3 MARKS]

Q. Which of the following is not responsible for causing global warming?

1. Jet planes
2. Carbon dioxide
3. Methane
4. Ozone layer

Q.

Carbon monoxide is the main reason for global warming

1. True
2. False

Q.

How deforestation has become a contributor to global warming?

Q. Assertion :Contribution of ${CO}_2,{CH}_4,{CFC}_s$ and $N_{2}O$ toward greenhouse effect is respectively 60%, 6%, 14% and 20%. Reason: Greenhouse gases are radioactively active gases which prevent the short wavelength radiations emitted by earth to escape into space.

1. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
2. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
3. Assertion is correct but Reason is incorrect
4. Both Assertion and Reason are incorrect