In some areas of the world, like california and japan, earthquakes are a common occurrence. how can this best be explained? a) the strong ocean currents are undermining both areas causing earthquakes. b) both area are subjected to strong ocean wind and waves that causes earthquakes. c) both areas are located near the edge of the pacific ocean, the unstable sand causes earthquakes. d) both areas are on the boundary of active plate margins, the motion of the plates causes earthquakes.

answer: the metamorphic rocks are formed when they are exposed to high pressure and high temperatures. this happens when one of the earth's plates comes in contact with the other plate by traveling in opposite directions, straight into each other or slipping under one another. the friction that is caused by this activity results in   melting of rocks and when it cools they are known as metamorphic rocks. this process needs a controlled amount of pressure and temperature otherwise it may turn into magma.

find the surface area of the sphere to the nearest square unit. use a calculator.

a. 254 in.2

b. 64 in.2

c. 127 in.2

d. 1,018 in.2