Plate Tectonics

3. Hypothesis proposed by Alfred Wegener that states that continents have slowly to their current locations on earth.
4. Single large landmass made up of all the continents connected together.
5. Waves that travel outward from an earthquakes focus and move thought earth by causing particles in rocks to vibrate at right angles to the direction of the wave.
6. Vibrations caused by breaking rocks along faults.
7. Scientist who study earthquakes and seismic waves.
8. In an earthquake, the point beneath Earth's surface where energy release occurs.
9. Large opening formed when the top of a volcano collapses.
10. Waves that travel outward from an earthquake's focus and cause particles in rocks to move back and forth in the same direction the wave is moving.
14. Plastic like layer below the lithosphere.
15. Measure of the energy released by an earthquake.
16. Earth's outermost layer, which varies in thickness from about 5km to 60km.
17. Device used by seismologists to record primary, secondary, surface waves from earthquakes.
18. Surface along which rocks break and move.

1. Surface along which rocks break and move.
2. Steep walled depression around a volcanos vent.
3. Cycle of heating, rising, cooling, and sinking that is thought to be the force behind plate tectonics.
4. Theory that earth's crust and upper mantle are broken into sections that move around on a plastic like layer of the mantle.
11. Largest layer inside earth, lying directly above the outer core.
12. An opening on earth’s surface where magma is forced up and flows out as lava.
13. Energy waves that are produced at and travel outward from the earthquakes focus.