Greenhouse Effect

What is global warming and how can we reduce it?

List gases which are responsible for greenhouse effect.

1. Nitrous oxide
2. Methane
3. Sulphur dioxide
4. Ozone

What would have happened if the greenhouse gases were totally missing in the earth’s atmosphere? Discuss.

Explain the ozone layer, its advantages, and its depletion.

What Percentage Of Greenhouse Gas Is CO₂?

1. Primary- $S{O}_2,O_3,NO$
   Secondary- $CO,PAN$
2. Primary- $S{O}_2,NO$
   Secondary- $PAN,O_3,CO$
3. Primary- $S{O}_2,CO,NO$
   Secondary- $PAN{O}_3$
4. Primary- $PAN,O_3$
   Secondary- $S{O}_2,CO,NO$

The atmosphere traps the suns heat near the earths surface. This is called:

1. Oxygen
2. Nitrogen
3. Carbon dioxide
4. Chlorofluorocarbons

Define the Greenhouse effect.

1. Afforestation
2. Use of chemical fertilizers
3. Burning of fossil fuels
4. Both (a) and (b)

Name one inorganic molecule which is known as ozonised oxygen?

1. Minimising automobiles
2. Afforestation
3. All of the above
4. Avoid burning dry leaves, fodders

1. A and B
2. B and D
3. C and B
4. D and A

Among the gases (I) – (V), the gases that cause the greenhouse effect are:

(I) ${\mathrm{CO}}_2$

(II) ${\mathrm{H}}_2\mathrm{O}$

(III) $\mathrm{CFCs}$

(IV) ${\mathrm{O}}_2$

(V) ${\mathrm{O}}_3$

1. (I), (II), (III) and (IV)

2. (I) and (IV)

3. (I), (II), (IV) and (V)

4. (I), (II), (III) and (V)

1. warmer surface temperature
2. cooler surface temperature
3. there is no change in surface temperature
4. None of these

State any two measures to minimise the impact of global warming.

Describe the mechanism of greenhouse effect properly.

Which statement regarding the greenhouse effect is not correct?

1. It results in global warming

2. It is due to the high concentration of carbon dioxide

3. It is influenced by gases such as ${\mathrm{CH}}_4,{\mathrm{O}}_3\mathrm{and}\mathrm{CFCs}$.

4. It results in lowering the level of oceans due to high evaporation.

1. Global warming
   
2. Depression of sea level
   
3. Deforestation
4. Loss of species
   

1. N${}_2$O
2. CFCs
3. Methane
4. CO${}_2$

3. Ozone present in the troposphere is a major pollutant. However, ozone formation in aqua purifiers makes drinking water pure and safe. Explain.

Name any greenhouse gas which contributes to global warming.

1. Too much heat in the atmosphere
2. Greenhouse gases in the lower atmosphere absorbing radiation from the Earth's surface, and preventing much of it escaping into space
3. Greenhouse gases in the lower atmosphere absorbing solar radiation
4. Too much sunshine reaching Earth

1. $H_2$
2. CO
3. $C{O}_2$
4. $N_2$