Plate Tectonic Terms

2. boundaries between plates
4. the upper layer of earths interior, including the crust and the upper brittle portion of the earths mantle
8. the theory thatthe configuration of Earth's continents was once different than it is today
11. the otter layer of the earth
13. the center of the earth
16. The theory that seafloors crack open along the crests of mid-ocean ridges and that new seafloor forms in those areas
19. thick,dense,middle layer of the earth
20. The study of tectonism, including its causes and effects, most notably mountain building

1. a form of stress produced by a force that acts to stretch a material
3. a region of extremely high pressure underlying the lithosphere, where rocks are deformed by enormous stresses. (depth of 100-350km)
5. an area of fracturing between rocks that has been bent by stress
6. large movable segments of the lithosphere
7. plates move away from one another
9. any attempt to deform a solid
10. sub marine mountain ridges where new seafloor is created by seafloor spreading
12. plates move toward one another
14. a long trough bounded by two or more faults
15. an area of rock that has been bent by stress
17. a split between two bodies (for example, two plates) that once was joined
18. two plates slide past one another in opposite directions