Which one of the following statements is not true?

a. Melting temperatures of silicate rocks increase with increased pressure
b. Melting temperatures of silicate rocks are lowered by small amounts of water
c. Basalt magmas in general have higher temperatures than rhyolite magmas
d. When magma reaches the surface, its dissolved gas content increases

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.