The Earth's Surface: Shaping the crust

What is the inner most layer of the earth called?

What occurs where two tectonic plates separate?

Which of the following causes the Earth's tectonic plates to move?

Most volcanic activity takes place at the:

A volcano that has not erupted in a long time but may erupt again is known as:

Energy produced from the heat of the Earth is called:

The point on the earth's surface, directly above where an earthquake occurs is called the:

A (a)   is the instrument used to measure the tremors of in the earth's crust during an earthquake.

______________ occurs when rock layers bend under stress.

_____________ plate boundaries are where tectonic plates collide.