Air Exerts Pressure (With activities)
Air Exerts Pressure The envelope of air surrounding the earth is called atmosphere . Air has weight. The weight of air presses our bodies all the time . This weight of air acting on a surface causes air pressure . Some daily life experiences that show that air exerts pressure You find it easier to row the boat when the wind is blowing behind you. The wind coming from the back help in flying kite. When we suck from the straw, the liquid rises in it. The medicine enters the syringe when a piston is pushed out. Activity I Materials Required: tumbler, water, square cardboard piece Method: Fill up the tumbler with water up to the brim. Cover it with cardboard piece and turn the glass upside down. Slowly remove your hand. Observation: Cardboard does not fall and water stays in the glass. Inference: air pushes the cardboard up and prevents it from falling. Activity II Materials Required: plastic bottle wi...