Tectonic Plates

2. MANTLE, A very thick layer beginning under the Earth's crust.
4. WAVES, Waves of energy through Earth's layers, the result of earthquakes.
7. BOUNDARY, When tectonic plates move away from each-other
8. Fastest and first seismic waves, also called primary waves.
11. Fractures in the Earth's crust from extreme forces caused by moving rocks in the asthenosphere.
12. BOUNDARY, When tectonic plates slide past each-other.
13. BOUNDARY, When tectonic plates moving towards each-other.
16. The outer layer covered in overlapping tectonic plates.
17. MANTLE, The liquid layer beneath the upper mantle.
18. An extremely hot, semi-molten liquid stored under the Earth's surface.

1. What scientists use to detect and record earthquakes.
3. When the Earth's crust is subjected to extreme pressure and begins to fold over itself.
5. DRIFT, A theory that explained how continents moved on Earth's surface.
6. The second wave of seismic waves, slower then P waves.
9. The end-result of the movement of tectonic plates.
10. WEGENER, A German who proposed the theory of tectonic plates.
14. Where an earthquake begins from.
15. CORE, A liquid layer wrapping around the inner core.