unit 3 vocab

2. the solid, outer part of Earth
3. when two tectonic plates move away from each other
4. a seafloor mountain system formed by plate tectonics
8. the action or process of changing in shape
9. the gradual movement of the continents
11. a naturally occurring inorganic element
15. a geologic structure that is formed by layers or beds
16. openings, or vents where lava, tephra, and steam erupt onto the Earth's surface
18. formed from pre-existing rocks
21. a scientific theory that explains how major landforms are created
22. the upper layer of the earth's mantle, below the lithosphere
23. When two plates come together
24. a fracture or zone of fractures between two blocks
25. long chains of active volcanoes with intense seismic activity

1. places where plates slide sideways past each other
5. the deformation of a material from stress
6. a fracture or zone of fractures between two blocks
7. a geologic process in which tectonic plates split apart from each other
10. started out as some other type of rock
12. form when hot, molten rock crystallizes
13. the process by which rocks of one kind change into rocks of another kind
14. rough measure of the resistance of a smooth surface
17. the rising or settling of a portion of the Earth's lithosphere
19. the force acting on the unit area
20. the study of ancient pole positions