vocabulary Definitions Science 8

4. a break in a body or rock along which one block moves
5. a system of ideas that explains many related observations and is supported by a large body of evidence
7. The location within earth along a fault
10. tectonics Tectonics The theory that Earths outer layer is made up of large, moving pieces called tectonics plates
11. rebound the sudden return of elastically deformed rock to its unformed shape
13. thin and solid outermost layer of Earth
15. A movement of trembling of the ground that is caused by a sudden release of energy
16. The layer of rock between the Earths
17. boundary the boundary between two technotic plates that are colliding
18. boundary The boundary between tectonic plates that are sliding horizontally
19. current any movement of matter that results from differences in density
22. The process in which one lithosphere plate moves beneath each other
23. The strong, lower part of the mantle between the asthenosphere and the outer core

1. the bending, tilting, and breaking of Earths crust
2. The solid outer layer of Earth that consist of the crust
3. floor spreading the process by which new oceanic lithosphere forms when magma rises to earths surface
6. reversal Earths magnetic north pole and magnetic south pole switch positions
8. plate boundary the edge between two or more plates classified as divergent
9. and core The central part of Earth below the mantle
12. plate a block of lithosphere that consist of the crust and the rigid, outermost part of the mantle
14. boundary the boundary between two technotic plates that are moving away from each other
20. the point on earth's surface directly above an earthquakes starting point
21. the soft layer of the mantle