Across
- 1. the solid, outer layer of the earth that consists of the crust and the upper part of the mantle
- 5. created by two pieces of continental crust converging
- 6. a deep valley that forms on land at a divergent boundary where two plates move apart
- 9. the supercontinent that existed millions of years ago
- 10. boundary between two colliding plates - keywords: ocean trench
- 11. an underwater chain of mountains.
- 12. a vent on the earths surface where magma and gases are expelled
- 13. boundary between two plates that are sliding past each other
Down
- 2. creates midocean ridges, earthquakes, and volcanic activity
- 3. a boundary where two plates are moving apart - hint: create new crust
- 4. the process by which Earth's crust breaks apart
- 7. a theory proposed by Alfred Wegener that explains how large pieces of land called plates move and change shape of the earth.
- 8. when one tectonic plates dives under another