There are many - sea erosion, stream erosion, volcanoes, tectonic plate movements, invasion by wind-blown dust and sand, glaciers.
The gravitational forces of the Sun and Moon, effect the earths oceans by forming tides.
sunspot: A spot or patch appearing from time to time on the sun's surface, appearing dark by contrast with its surroundingThey appear because of strong magnetic forces on the sun. Our magnetic forces are changing on earth too.
Volcanism Earthquake Dradiation
The "500 - n" you mention is either the woman's name or her weight. If it's her weight, then that is in fact the size of the mutual gravitational forces between her and the Earth. It's her weight on Earth, and it's Earth's weight on her.
The moon's gravity is essentially identical to 100% of the moon's gravity, and results in gravitational forces on its surface that average about 16% of the corresponding forces on the Earth's surface.
buthole
Most common change to the Earths surface from internal forces would most likely be earthquakes and volcano eruptions. External forces could be considered meteor strikes, or possibly the effects of gravity on the oceans ( Tides ) Global warming is also melting glaciers and causing a growth in arid regions. kapm
Weathering and erosion shape earths surface by changing earths surface by having extreme forces that change earth.
buthole
Exogenous forces are forces that work above the earths surface and break down landforms. Endogenous forces are forces that work below the earths surface and build up land forms
The tectonic plates below earths surface shape earths landforms
because of the earths surface
external
Umm, I think the crust.
The answer is Weatering And Erosion.
These forces may be either external or internal. As Surface forces act on the surface of the water body by direct contact.
buthole