earthquakes & volcanoes
Across
- 1. molten rock that issues from a volcano.
- 4. a fracture along which the blocks of crust on either side have moved relative to one another parallel to the fracture.
- 6. a large underground pool of molten rock found beneath the surface of the Earth
- 9. the hypothesis that the Earth's continents have moved over geologic time relative to each other
- 10. a supercontinent that existed during the late Paleozoic and early Mesozoic eras.
- 12. a scientific theory that explains how major landforms are created as a result of Earth's subterranean movements.
- 13. a giant wave caused by an earthquake on the ocean floor
- 14. he is most notable for his theory of continental drift
- 15. a path along the Pacific Ocean characterized by active volcanoes and frequent earthquakes
Down
- 2. an opening in the earth's crust through which lava, volcanic ash, and gases escape.
- 3. the sudden movement or trembling of the Earth's tectonic plates.
- 5. the study of earthquakes
- 7. an underwater mountain range formed by plate tectonics.
- 8. a tectonic plate at the bottom of the oceans.
- 11. instrument used to measure earthquakes