Plate Tectonics

3. A change of the magnetic poles
6. When two tectonic plates move away from one another or diverge
10. The outermost physical layer of Earth
13. Changes the chemical makeup of a rock
15. Two tectonic plates can move past one other in opposite directions
16. The bending, tilting, and breaking of rock
17. Wegner called it the huge landmass or supercontinent
18. The process by which rock breaks down into smaller pieces or changes in composition
20. System of ideas that explains many related observations about the natural world
21. The difference between the highest and lowest elevations in a particular area

1. The procces by which one tectonic plate is pulled beneath another plate
2. Lays down rock, sediment, and soil
4. Procces by which new sea floor forms
5. States that Earth's surface is made up of giant, moving slabs
7. Hypothesis that todays's continents were once part of a single landmass
8. Also called mechanical weathering, the breakdown of rock into smaller pieces
9. When tectonic plates move toward each other and collide
11. Shows the shape of Earth's surface with lines that represent different elevations
12. The layer immediately below the lithoshpere
14. The shape and size of the land features on Earth's surface
19. Transports rock, sediment, and soil from one place to another