volume_mute
What is the primary physical cause of the atmospheric pressure that acts on everything at the surface of the Earth?
publish date: 2026/05/20 22:35:56.849899 UTC
volume_mute
Correct Answer
The weight of the massive air column extending upward into space.
Explanation
Atmospheric pressure is caused by the weight of the air above us being pulled downward by gravity, pressing down on all surfaces at sea level with an average force of 14.7 pounds per square inch.
Reference
Basic Physics: A Self-Teaching Guide