Across
- 4. a fluid's resistance to flowing.
- 5. a large plume of hot mantle material rising from deep within the earth.
- 10. a large volcanic crater, formed by a major eruption leading to the collapse of the mouth of the volcano.
- 13. the body of intrusive igneous rock.
- 14. the theory the earth's outer shell is divided into large slabs of solid rock.
- 17. the upper layer of the earth's mantle
- 18. a lowland region that forms where Earth tectonic plates move apart.
- 19. a steep conical hill of loose pyroclastic fragments.
- 20. a line on a diagram or map connecting points relating to the same time to equal times.
Down
- 1. the rigid outer part of the earth.
- 2. measures earthquake's magnitude (size).
- 3. when two plate tectonics collide.
- 6. a fracture or zone of fractures between two blocks of rock.
- 7. the point in the crust where a seismic rupture begins.
- 8. layer above the outer core.
- 9. any type of igneous intrusion that has split apart two strata.
- 11. when two plates plate tectonics pull away from each other.
- 12. a very large igneous intrusion extending deep in the earth's crust.
- 14. changers in earth's magnetic field.
- 15. a conical volcano built up by many layers of hardened lava and tephra.
- 16. an volcano with gently slopping slides.