what is air pressure ? how does it form and what impact does it have ? very shortly
Answers
Answer:
It is the pressure exerted on Earth's surface due to the weight of the overlying air molecules. ... Mercury flows out of the tube to balance the weight of the mercury column by the pressure exerted on the mercury in the dish.
Explanation:
Air pressure is caused by the weight of the air molecules above. ... This pressure causes air molecules at the Earth's surface to be more tightly packed together than those that are high in the atmosphere.
Changes in air pressure could have a big effect on climate. Air pressure controls the atmosphere's circulation, and therefore influences how moisture moves. Changes in circulation can alter rainfall, temperature, winds and storminess. ... These trends, and their impact on climate, could be stronger than we thought.