Plate Tectonics

2. A crack or fracture in
7. occurs where two plates
8. a zone where two tectonic plates are pulling apart.
10. The border between two tectonic plates
12. The place where a collision between two continental plates crunches and folds the rocks at the boundary, lifting them up and leading to mountain formation
15. The type of crust lying under the oceans of the world. It is only 4 to 6 miles (7 to 10 km) thick and usually younger than continental crust.
17. (35 to 70 km) thick and very old.
19. A deep valley that forms at the edge of a continent when an oceanic plate sinks underneath a continental plate.
20. The process that forms new ocean floor and oceanic crust. Magma oozes up from the mantle through a crack in the ocean floor, filling in the space between the plates and spreading out from the plate boundary.

1. there is land at the edge of one of these plates,the ocean plate will subduct, or slide under that plate.
3. movement is felt as an earthquake.
4. crust where two tectonic
5. occurs where two plates slide against each other. But rather than sliding smoothly, the plates build up tension, then release the tension with a spurt of movement.
6. apart, allowing magma, or molten rock, to rise from the Earth' s interior to fill in the gap. The two plates move away from each other like two conveyor belts moving in opposite directions.
9. occurs where one plate slides under another as the two are pushed together.
11. The name given to the supercontinent that existed more than 225 million years ago, in which the present-day continents were joined together in one large landmass.
13. Zone, The place where one plate is getting bent and pulled under the edge of another plate.
14. grind past each other in a horizontal direction
16. layer of the earth's crust that lies under the seven continents. It is about 20 to 40
18. A raised area or mountain range under the oceans formed when magma fills the space between two tectonic plates that are spreading apart.