Composition and structure of atmosphere

Name the gas that protects us from harmful sun rays.

• Carbon Dioxide

• Nitrogen

• Ozone

• Oxygen

Which of the following layers of the atmosphere is free from clouds.

• Exosphere

• Troposphere

• Thermosphere

• Stratosphere

State the share of Oxygen gas in the atmosphere

• 21%

• 0.04%

• 78%

• 0.93%

State the number of layers of our atmosphere.

• 7

• 5

• 3

• 6

Meteorites burn up in which layer of the atmosphere on entering from space

• Troposphere

• Stratosphere

• Mesosphere

• Exosphere