PLATE TECTONICS
Across
- 1. the process by which earths crust breaks apart; can occur with continental crust or oceanic crust
- 3. a break in a body of rock along with one block sides relative to another; a form of brittle strain
- 6. an instrument that records vibrations in the ground
- 7. any change in rocks shape or volume caused by stress
- 9. the process by which new oceanic lithosphere forms when magma rises to earths surface at mid ocean ridges and solidifies, as older, existing sea floor moves away from the ridge
- 14. in earths science,the amount of damage caused by an earthquake
- 16. the supercontinent that formed 300 million years ago and that and that began to break up 200 million years ago
- 17. a movement or trembling of the ground that is caused by a sudden release of energy when rocks along a fault move
- 18. a tracing of earthquake motion that is recorded by a seismograph
- 20. a seismic wave that travels along the surface of a medium and that has a stronger effect near the surface of the medium than it has in the interior
Down
- 2. a region of numerous closely spaced faults
- 4. a series of mountain that are closely related in orientation, age, and mode of formation
- 5. the location within earth along a fault at which the first motion of an earthquake occurs
- 8. a seismic wave that travels through the body of a medium
- 10. the sudden return of elastically deformed
- 11. a mountain that forms when rocks layers are squeezed together and uplifted
- 12. the theory that explains how large pieces of the lithosphere, called plates, move and change shape
- 13. magma that flows onto earths surface, the rock that forms when lava cools and solidifies
- 15. the amount of force per unit area that acts on a rock
- 19. liquid rock produced under earths surface
- 21. to its undeformed shape