People, plants, animals and insects live in the __________.
Stratosphere
Mesosphere
Thermosphere
Troposphere
The layer of atmosphere helps in the transmission of radio waves
Exosphere
None of these
The pressure exerted by the weight of air on the earth's surface is known as
Air pressure
Wind
Cyclone
The degree of hotness and coldness of the air
Temperature
Pressure
__________ is important for plants.
Methane
Neon
Argon
Carbon dioxide
Which of the following gases protects us from harmful sun rays
Carbon Dioxide
Nitrogen
Ozone
