Question

what is atmospheric pressure? what is it caused by...??

Answer 1

The pressure exerted by the earth's atmosphere at any given point,being the product of the mass of the atmospheric column of the unitarea above the given point and  of the gravitational acceleration at thegiven point.                                                    Atmospheric pressure is simply the result of the weight of the air above any particular point on earth. Gravity is the force that gives everything including atmospheric gases their weight. It is as simple as that.

Answer 2

HEY USER,
___________________________________

1⃣What is atmospheric pressure?

▶The pressure that is exerted by the weight of the earth's atmosphere at a given point is called atmospheric pressure.
___________________________________

2⃣What is it caused by?

▶It is caused by the earth's 'gravitational force' that holds this air around us.
___________________________________
Hope it helps.
Thanks for the question.