Plate Tectonics

3. The boundary between two colliding tectonic plates
5. Vibration from underground movement along a fault plane
6. A break or crack in the Earth's surface
7. The branch of geology that studies earthquakes
8. The soft layer of the mantle
10. Molten rock in the Earth's crust
11. The edges where two plates meet
14. A crack in the Earth's crust through which gases escape
15. The boundary where two tectonic plates move away from each other
17. Type of volcano that is the biggest and has large gentle slopes
18. Type of volcano that is big, round and shaped like a cauldron
20. The movement of the edge of one tectonic plate under another
23. Simplest type of volcano, conical with low, steep sides and often found on sides of other types of volcanoes
25. The outermost layer of the Earth
26. Region formed where two plates move apart and can be found on land or the bottom of the sea
28. The study of the movement of Earth's crust
29. The theory that continents drift apart
31. Continental transform fault that extends through California

1. The science of the history of the Earth as recorded in rocks
2. the layer between the crust and the core
4. The boundary where two tectonic plates slide by each other
9. The process that happens at mid-ocean ridges where new oceanic crust is formed through volcanoes and then gradually moves away from the ridge
12. When magma erupts onto the surface it is called this
13. Volcano that buried the ancient town of Pompeii in Italy
16. A long, underwater ocean ridge created by divergent boundary
19. The liquid layer of the Earth's core
21. This is the region around much of the rim of the Pacific Ocean where many volcanic eruptions and earthquakes occur
22. The outermost, rigid layer of the mantle
24. Mountains created where two or more continental plates are pushed together. The Himalayan mountains are an example.
27. Type of volcano that is large and has steep slopes, also called a composite volcano
30. A long narrow depression in a surface