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