CHAPTER -4 AIR

A huge blanket of air which surrounds the earth is called?

• Thermosphere

• Atmosphere

• Stratosphere

• None of these

All the human beings are dependent on the atmosphere for their survival because?

• The atmosphere protects us from the harmful effects of the sun's rays.

• It provides us the air we breathe

• It consists of 5 layers

• All of the above

Name the 2 gases which make up the bulk of the atmosphere.

• Oxygen & Carbon dioxide

• Nitrogen & Oxygen

• Helium & Argon

• Carbon dioxide & Argon

Name the most plentiful gas in the atmosphere.

The air we breathe exist in this layer of atmosphere.

• Exosphere

• Mesosphere

• Troposphere

• Stratosphere

Ozone layer is present in this layer of atmosphere.

Meteorites burn in this layer of atmosphere.

• Thermosphere

• Troposphere

• Mesosphere

• None of these

The incoming solar energy intercepted by the earth is called ?

the pressure exerted by the weight of air on the earth’s surfaceT

The air pressure is ​________ at sea level and ​ decreases with height.