How were maps an important tool for european powers during the 1500s?

What was the great rift valley formed by

Which city area has the most accessible oil reserves a) caspian sea b) siberia c)arctic coast d)lake baikal

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.