Page 169 - Science Class 06
P. 169
Why do Earthworms Come Out of the Soil v Air also evaporates sweat during
When it Rains? summers and gives a cooling effect.
A number of small organisms live in soil. v Air also supports burning. The oxygen
Earthworms live in the small holes of the present in air supports burning.
soil. The small pores of the soil allow air to v Moving air is used to run the
enter it. In this way, earthworms get air for blades of windmills which is used to
breathing. But when it rains, all the pores generate electricity. The windmills are
also used to draw water from
are blocked by water and air does not enter
tubewells and to run flour mills.
the pores or holes of the soil. So, earth-
v Air also dries up wet clothes. Moving
worms and other oganisms become restless
air evaporates the water faster and
due to loss of air and comes out of the soil
the clothes get dried easily.
immediately.
v Sound needs a medium to travel. Air
gives it medium to travel.
v Air also helps in dispersal of seeds as
well as in pollina on.
v Air acts as habitat for many animals
like birds, insects, bats, etc.
v Air helps in the movement of air cra s,
gliders, parachutes, sailboats, etc.
Earthworm
v Atmosphere is also made up of air
IMPORTANCE OF AIR which protects us from ultraviolet
rays coming from the sun. Atmos-
You studied about the importance of air in
phere also maintains the temperature
breathing. Now, you will study about other
of the earth. It does not let the heat
uses of air.
escape from the earth’s atmosphere
v Air is filled in tyres of vehicles such as bi- and keeps the earth warm during the
cycles, scooters, cars, trucks, aeroplanes, nights.
etc.
OTHER COMPONENTS OF AIR AND THEIR
v Air is also used to inflate balloons and IMPORTANCE
balls.
You have studied about the two main
components of air—oxygen and caron-
dioxide and their importance in the
sustenance of life on the earth. The other
components of air are also very important
in one way or the other.
Nitrogen (N )
2
Nitrogen is the main cons tuent of the air. It
A boy pumping air into bicycle. does not support burning, but control
Science-6 169
