Question

What are the four processes that shape the surface of planets and satellites?

Answer 1

The four common Planet Surface Processes are: Cratering, Volcanoes, Erosion, and Weathering (chemical and physical).

Explanation:

The four common Planet Surface Processes are: Cratering, Volcanoes, Erosion, and Weathering (chemical and physical). Accretion, collisions and radioactive decay would be required in the formation.

There may be more than four, or different sets of four, depending on the definitions of “process” and “shape” you use, and the intended geological time scale.
http://www.lpi.usra.edu/education/resources/processes/
http://physicstoday.scitation.org/doi/10.1063/PT.3.1789
http://www.scholarpedia.org/article/Planetary_formation_and_migration