Page 85 - Genius Kidz Prudence Learning Sc-8

Activity 6

Why are you able to suck in fruit juice with the help of a straw?
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ATMOSPHERIC PRESSURE Now, as we know, pressure = force per unit

Atmosphere is a gaseous mixture surrounding area. So, atmospheric pressure is the pressure
the earth. Atmosphere is retained by exerted by the atmosphere air on the earth's
gravitational pull. Different gases have the surface per unit area.
power to exert pressure. Pressure exerted on 1 unit of atmospheric pressure is a very huge

the surface of the earth by the mixture of gases pressure and it has the power to crush almost
of atmosphere is called atmospheric pressure. anything.

Activity 7
“1 unit of atmospheric pressure can crush almost anything.” Then how to we sustain this pressure?

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! Barometer is the device used for measurement of atmospheric pressure.
! At higher altitude, nose of some people starts to bleed because pressure in their body becomes higher at high
altitude as a result of which their blood vessels burst open.
! The same reason is applicable to leaking of fountain pen at higher altitudes.

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