Air - structure and composition

The word Atmosphere is derived from the Greek words

• Atmos and Vapour

• Atmos and Sphere

• Atmos and Spaira

• Spira and vapour

Mixture of several gases form our

• Earth

• Atmosphere

• Photonic Plate

The percentage of nitrogen in the atmosphere is

• 21%

• 0.01%

• 10%

• 78%

The uppermost layer of the Atmosphere is called

• Thermosphere

• Troposphere

• Exosphere

• Stratosphere

Ozone is concentrated in the lower part of

• Exosphere

• Stratosphere

• Thermosphere

• Tropopause

The ............................... layer is also known as Ozonosphere

• Troposphere

• Stratosphere

• Mesosphere

• Exosphere

Ozone layer protect us from the .......................... rays

• Tropopause

• Ionosphere

• Ultraviolet

• Moon

The Temperature on this layer can may reach upto 4,500*C

• Exosphere

• Mesosphere

• Stratosphere

This layer helps in long distance wireless and satellite communication.

• Exosphere

• Troposphere

• Thermosphere

• None of these

This layer burns the meteors which comes from outer space

• Mesosphere

• Thermosphere

• All of these