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draw and write an activity to prove that air exerts pressure.

Dear student, 
​Please find below the solution to the asked query        

Gases exert pressure on surfaces with which they come in contact.The pressure that a gas exerts on a surface is the result of gas particles colliding with the surface. Since the gas particles move randomly in all directions, they exert pressure equally in all directions.If the volume of the gas is kept constant , its pressure increases with the increase in temperature. 

For example, when the air is suck out of a bottle, the air present out side it exerts pressure in all possible directions of bottle . Due to this reason the bottle gets crushed.
  
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take a tin can with lid .fill it half with water .now heat it on candle flame until water starts boiling.blow out the candle.put the can in washbasin.pour fresh water over the can we observe that can get distorted.this is because when water is poured over the can some in the can condense into water,reducing the amount of air inside can.the pressure of air inside the can decreases than the pressure exerted by the air from outside the can.as a result the can get distorted.this activity prove that air exert pressure.
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