Plate Motion

3. Earth’s outer layer is made of hard, _______ rock.
5. Earth’s plates move on top of a soft, solid layer of rock called the ________.
6. A diagram that shows what the inside of something looks like.
9. The place where two plates meet
11. At _________ plate boundaries, one plate moves underneath the other plate and sinks into the mantle.
12. Evidence of life from the past
13. A sudden shaking of Earth's crust
15. The plates of Earth’s outer layer ______.

1. Earth’s outer layer is divided into sections called ________.
2. An underwater mountain range formed when two plates move apart
4. Geologists look for ________ in landforms and in geologic events in order to better understand Earth.
7. Earth’s plates travel at a rate too _______ to be experienced by humans.
8. At _________ plate boundaries, rock rises from the mantle and hardens, adding new solid rock to the edges of both plates
10. It takes a _______ time for Earth’s plates to travel great distances.
14. A long, deep indentation in the ocean floor formed when two plates move together