When does the edge of the water advance further inland --when the ocean's floor is a gradual slope or a steep slope? Why? (Drawing two different slopes might help you think about this.)

the only other powers were germany russia and uk and they were too busy fighting each other wearing each other down   that the us was becoming strong and they were becoming weaker

c. seafloor spreading occurs.

d. crust becomes molten rock.

e. denser plates slide under lighter plates.