Plate Tectonics

4. Core, liquid core, made of nickel and iron
6. A Supercontinent that existed about 250 million years ago
7. the earth’s outer layer; the coolest and least dense layer of the earth
9. a series of sea waves caused by underwater earthquakes
10. Core, The center of the earth composed of nickel and iron
15. when two plates COME TOWARD each other
16. the layer of the mantle that lies directly below the the Lithosphere and flows like taffy

1. The cool solid outer shell of the earth. It consists of the crust and the rigid upper part of the mantle
2. When two plates move AWAY from each other
3. the layer of the earth beneath the crust
5. Plate, A large mobile segment of Earth’s lithosphere
8. the movement of a tectonic plate beneath another plate
9. When two plates SLIDE along side each other
11. Tectonics, a theory that the lithosphere is broken into segments, or plates that “FLOAT” on the asthenosphere
12. Ridge, a mountain-like landform that develops when plates separate
13. Trench, a long narrow steep-sided depression in the earth’s oceanic crust
14. Boundary, a place where pieces of the broken Lithosphere meet