Question

Write a short summary on Air pressure class-7th.

Answer 1

Air has mass therefore it also has:

Density: The amount of mass in a given volume is densityPressure: The force pushing down on a surface is pressure

 

Air Pressure: The weight of a column of air pressing down on an area of Earth.

The atmosphere is heavy, as heavy as a school bus!The reason it doesn’t crush you is that it is spread out and pushes equally in all directionsDenser substances have more mass so they add more pressure, thereforeDenser air exerts more pressure than less dense air.

 

Barometer: An instrument that measures air pressure.

Answer 2

Air pressure is a force in an area pushed against a surface by the weight of air in Earth's atmosphere. The earth is covered in a layer of air. However, this layer is not distributed evenly around the globe. At different times, the layer of air is thicker in some places than in others. Where the layer of air is thicker, there is more air. Since there is more air, there is a higher pressure in that spot. Where the layer of air is thinner, there is a lower atmospheric pressure.
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