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ErosionEarth's magnetic fieldmelted glaciersEarth's force of gravity
Yes, it is.
No. Magnetism has nothing to do with it. It's strictly the result of gravity.
Earth is held in elliptical orbit around the sun by gravity. It's motion can be thought of as due to a combination of gravity and inertia.
Mass and Earth's gravity
Yes, pressure increases with depth as a result of the weight of water above a given depth. Weight is caused/determined by gravity.
It makes things weigh more or less, depending on the surface gravity.
The pressure exerted by the Otolithic organ on hair cells of the Maculae.
An erupting volcano occurs when the pressure of the molten lava beneath becomes too great.
The atmosphere (the air above you) naturally applies air pressure as a result of Earth's gravity. In other words, because it is made of matter it has weight.
Gravity is a result of mass. Objects with twice the mass will have twice the gravity, assuming you are the same distance away.
Pressure = force / area. If the force is the result of the weight of a specific object, you can additionally use the formula: force = mass x gravity, i.e., you can combine this with the previous formula.