Plate tectonics
Across
- 2. linear feature that exists between two tectonic plates that are moving away from each other.
- 6. a substance consisting of two or more substances mixed together
- 8. where Earth's tectonic plates dive back into the mantle,
- 10. core about 1300 miles (2092 km) thick.
- 12. the usual process at work at divergent plate boundaries, leading to the creation of new ocean floor
- 14. When two plates come together
- 15. planar fracture or discontinuity in a volume of rock across which there has been significant displacement as a result of rock-mass movements.
- 17. a layer inside a planetary body bounded below by a core and above by a crust
- 18. lies between the thermosphere and the stratosphere
- 19. zone of Earth's mantle lying beneath the lithosphere and believed to be much hotter and more fluid than the lithosphere.
- 20. a hot, dense ball of (mostly) iron
Down
- 1. very hot, very dense center of our planet.
- 3. plates gigantic pieces of the Earth's crust and uppermost mantle.
- 4. application of balanced inward forces
- 5. most associated with the scientist Alfred Wegener
- 7. physical properties that a material exhibits upon the application of forces
- 9. Plate tectonics is the scientific theory that Earth's lithosphere comprises a number of large tectonic plates, which have been slowly moving since about 3.4 billion years ago.
- 11. places where plates slide sideways past each other
- 13. the outermost shell of a terrestrial planet.
- 16. the rigid outer part of the earth, consisting of the crust and upper mantle.