Greenhouse Gases

Q. The amount of carbon dioxide has increased in the atmosphere in recent years. This change is as a result of

1. Overcutting of forests and the increased use of fossil fuels

2. Improper storage of solid and nuclear waste

3. Use of herbicides and toxic substances such as asbestos and DDT
4. Dumping of inorganic materials into lakes and rivers

Q.

Do greenhouse gas cause global warming?

Q.

Which of the following is/are greenhouse gases?

1. Nitrogen

2. Water vapour

3. Methane

4. Carbon dioxide

Q.

How do greenhouse gases work?

Q.

4 (a) What is greenhouse effect?

Q. Name any four greenhouse gases.
[2 MARKS]

Q.

Can we live without the greenhouse effect?

Q. Beside $C{H}_4$ and $C{O}_2$ other greenhouse gas from agriculture area is

1. $S{O}_2$
2. $N{H}_3$
3. $N{O}_2$
4. CFC
5. $N_{2}O$

Q. Match the following and choose the correct combination from the option given below.

	Column I (Green house gases)		Column II (Concentration in 2000 AD)
A	$C{O}_2$	1	282 ppt
B	$C{H}_4$	2	316 ppb
C	$N_{2}O$	3	368 ppm
D	$CFC+HFC$	4	1750 ppb

1. A- (3), B- (4), C- (2), D- (1)
2. A- (4), B- (3), C- (2), D- (1)
3. A- (2), B- (3), C- (4), D- (1)
4. A- (1), B- (4), C- (2), D- (3)
5. A- (1), B- (2), C- (3), D- (4)

Q.

Which of the following statement is correct regarding Sun's radiation on Earth?

1. Some of the radiation is reflected while most of it is absorbed.

2. Most of the radiation is reflected while some of it gets absorbed.

3. Fifty percent of the radiation is reflected while fifty percent of it gets absorbed.

4. All the radiations received on Earth get absorbed.

Q.

What are greenhouse gases?

Q.

Global warming is a consequence of the ________ effect caused by the ________ levels of carbon dioxide.

Q.

Which of the following statement is correct regarding Sun's radiation on Earth?

1. All the radiations received on Earth get absorbed.

2. Most of the radiation is reflected while some of it gets absorbed.

3. Some of the radiation is reflected while most of it is absorbed.

4. Fifty percent of the radiation is reflected while fifty percent of it gets absorbed.