Air chapter BRS 7th

______ plants produce oxygen during photosynthesis.

Our atmosphere is divided into five layers starting from

the earth’s surface. These are

• Troposphere,

  Mesosphere, Stratosphere, Thermosphere and

  Exosphere

• Troposphere,

  Stratosphere, Mesosphere, Thermosphere and

  Exosphere

• Troposphere,

  Stratosphere, Thermosphere, Mesosphere and

  Exosphere

An important factor that

influences the distribution of

temperature is _______.

• insalotion

• insolation

• transpiration

• tranpirastion

• Convection

The counter pressure exerted by the body of the astronauts (in space) would make the _____ ______ burst.

____ _____ measures the amount of rainfall.

What are the types of winds ?

• Permanent winds

• Seasonal winds

• Local winds

• All of these

• Only (a) and (b)

What gas is the most abundant gas in the atmosphere?

• Nitorgen

• Nitrogen

• Carbon doixide

• Carbon dioxide

• All of these

Hot and dry local wind in the northern plains is called ____.

_______ is another important gas.

What are gases in the air called that are found in very small amounts?

• invisible
• trace
• particle
• atmospheric