Plate Tectonics
Across
- 2. sideways and downward movement of the edge of a plate of the earth's crust into the mantle beneath another plate
- 5. any movement of matter that is caused by different densities
- 6. the change of the magnetic poles
- 9. the formation of new areas of oceanic crust which occurs through the upwelling of magma at midocean ridges
- 11. sudden release of stored energy in the Earth's crust that creates seismic waves
- 13. tectonic plates at the bottom of the ocean
- 15. Earth’s outer layer made up of tectonic plates
- 16. geologist that proposed the theory of sea-floor spreading
- 19. moving slabs that make up Earth’s surface
- 20. ideas that explain various related observations of the natural world
Down
- 1. theory that Earth’s surface is made of moving slabs
- 3. idea or explanation that you then test through study and experimentation
- 4. A tectonic boundary where two plates are moving away from each other and new crust is forming
- 7. when the force of gravity moves a plate downward and away from a ridge
- 8. hypothesis that today’s continents were a single landmass before becoming continents
- 10. layer of Earth below lithosphere that has differences in pressure and temperature causing the plates to move
- 12. name of the theorized supercontinent that
- 14. opening in the crust where molten rock, hot rock fragments, and hot gases erupt from
- 17. German geophysicist who proposed the theory of continental drift
- 18. the pulling of a tectonic plate as its edge subducts deep into the mantle