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4.The point on Earth's surface directly above the focus.
6.The bending of rock layers due to stress.
8.The boundary between two plates that are moving away from each other.
10.A break in a body of rock along which one block moves relative to another.
15.A vent in Earth's surface through which volcanic material passes.
19.The supercontinent formed 300 million years ago and that began to break up 200 million years ago.
20.The solid layer of the mantle that is made of mantle rock that flows very slowly.
1.The edge between two or more plates.
2.The theory that explains how the plates move and change shape.
3.The process where new oceanic lithosphere forms when magma rises to Earth's surface and solidifies.
5.A movement of the ground that is caused by a sudden relase of energy when rocks move along a fault.
7.An opening at the surface of Earth where Volcanic material passes through.
9.Deep cracks that form between two tectonic plates.
11.Magma that flows onto Earth's surface.
12.The outer layer of Earth that consists of the Crust and the Mantle.
13.The stress that forms when forces act in in opposite directions.
14.the point withing Earth where an earthquake's first movement occurs.
16.Stress that occurs when forces act to strech an object.
17.The layer of rock between Earth's crust and core.
18.The molten rock material under the Earth's surface.

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