It take 10 million (1x107) hudfs to fill the entire sky. using this information and your answer from the previous part, how many stars are there in the observable universe? express your answer using scientific notation.

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.