Plate Tectonics
Across
- 1. the layer of rock that forms Earth's surface
- 2. 300 million years
- 9. below the lithosphere
- 11. a certain force of pressing
- 12. a rock that is a light color with coarse grains
- 14. an boundary in which plates move apart
- 15. a force in which destroys
- 18. a wake in which earthquakes occur
- 19. an boundary in which plates slide past each other
Down
- 1. an boundary in which plates come together
- 3. forms Earth's outer layer
- 4. the crust and uppermost mantle into a single layer called what
- 5. a force in which shapes the land
- 6. the parts of Earth that contains living organisms
- 7. tectonics a theory of plate motions
- 8. a rock that is dark and is fine-grained
- 10. a system that uses sound pulses to detect the deep sea water
- 13. they are formed around transform boundaries
- 16. a process where the ocean floor sinks in deep-ocean trenches
- 17. an ancient organism that has been preserved in rock