The amount of water on earth a. increases slightly over time changes forms. b. decreases slightly over time and does not change form. c. remains the same just in different forms. d. remains the same and does not change form.

How does rain water cause erosion and deposition? a. when acidic water soaks into the ground, water dissolves limestone, resulting in the formation of caves.b. when a river overflows it moves downhill resulting in the formation of caves.c. when it rains, water flows into rivers and streams and moves back to land, resulting in the formation of caves.d. when water empties into lakes, sediment is deposited, resulting in formation of caves.