Question

A. Tick(√) the correct option:
1. Total mass of air surrounding our earth is known as:
a. Thermosphere
b. Endosphere
c. Atmosphere
d. mesosphere
2. Air contains 78 per cent of which gas?
a. Nitrogen
b. Oxygen
C. Carbon dioxide
d. neon
3. The layer of atmosphere in which ozone is found
a. Thermosphere
b. Stratosphere
c. Troposphere
d. lonosphere
4. Which of the following is not a greenhouse gas ?
a. Water vapour
b. Oxygen
C Carbon dioxide
d. nitrogen
5. Which gas protects us from the ultraviolet rays of the Sun ?
a. Oxygen
b. Nitrogen
c. Ozone
d. Carbon dioxide​

Answer 1

Answer:

1. c) Atmosphere
2. a) Nitrogen
3. b) Stratosphere
4. c) Carbon Dioxide
5. c) Ozone