Across
- 4. Magma may form when this is added to hot rock.
- 5. Magma that cools below the Earth's surface forming intrusive igneous rock bodies
- 9. One of Earth's major earthquake zones
- 12. a form of ductile strain in which rock layers ben, usually as a result of compression
- 13. magma rich in magnesium and iron and is commonly dark in color
- 14. a seismic wave that causes particles of rock to move in a back and forth direction parallel to the direction the wave is traveling
- 15. a measure of the strentgth of an earthquake
- 17. commonly form as the result of the collision of tectonic plates
- 19. a seismic wave that causes particles of rock to move in a side to side direction perpendicular to the direction in which the wave is traveling
- 20. magma that flows onto the Earth's surface
Down
- 1. used by scientists to record earthquake vibrations
- 2. often caused by ocean-floor earthquakes
- 3. a series of mountains that are closely related in orientation, age, and mode of formation
- 6. fragments of rock that form during a volcanic eruption
- 7. a break in a body of rock along which one block slides relative to another
- 8. the bending, tilting, and breaking of Earth's crust; the change in shape or volume of rock in response to stress
- 10. the measure of the effects of an earthquake
- 11. the point on Earht's surface directly above an earthquake's starting point, or focus
- 16. Areas of volcanic activity that are located over rising mantle plumes that can exist far from tectonic plate boundaries
- 18. any chain in a rock's shape or volume caused by stress