The layer of the atmosphere in which we live is the :
Troposphere
Stratosphere
Mesosphere
Thermosphere
Which is the uppermost layer of the atmosphere?
Exosphere
Which is needed by human body to carry out life processes?
Food
Water
Pressure
Gravity
Which is the first layer of the atmosphere?
What is atmosphere?
Mixture of gases that surrounds the earth
Mixture of gases that surrounds the sun
Mixture of gases that surrounds the moon
Mixture of gases that surrounds the planets
Air is a mixture of many:
Gases
Germs
Dust
Vapour
What do we need to breathe?
Inhaler
Smell
Vaporizer
Air
Presence of which gas in air makes respiration possible ?
Nitrogen
Hydrogen
Carbon dioxide
Oxygen
Air supplies us with:
Carbon
Space shuttles orbits in the:
