Question

c. What is the cause of atmospheric
pressure?​

Answer 1

Answer:

At sea level, standard air pressure in millibars is 1013.2. ... This change in pressure is caused by changes in air density, and air density is related to temperature. Warm air is less dense than cooler air because the gas molecules in warm air have a greater velocity and are farther apart than in cooler air.

Explanation:

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Answer 2

Atmospheric pressure is caused by the gravitational attraction of the planet on the atmospheric gases above the surface, and is a function of the mass of the planet, the radius of the surface, and the amount and composition of the gases and their vertical distribution in the atmosphere.