Earth's sysems can interact quickly or over long periods of time. give two examples of how earth can change quickly and two examples of how it changes ovr long periods of time.

Quickly... this is a harder one, because all of possible answers are the result of interactions over a long time. However, these change the surface of the earth the fastest
1.) Volcanoes
2.) Flooding

Over a long time
1.) Through the rock cycle... earthquakes, mountain forming, etc.
2.) Melting, or forming of ice... changes sea levels