Tectonic Plates

2. What is the name of the boundary when two tectonic plates move away from each other?
4. Only 21% of the earths atmosphere is made of this gas.
5. The Super Continent that existed 200 Million years ago.
7. Temperature of Earth and __________ as depth increases.
10. Sections of the Earth's crust.
12. Process in which rock, soil is removed from the surface.
13. The gases that surround the earth.
14. When plates of the earth move toward each other it produces a ______ Boundary.
16. Outer most surface of the earth.
17. Deposit of soil.
18. Layer in our atmosphere that contains our ozone layer.
19. Scientist that suggested the plates where moving.
22. When two plates are moving ________ from each other, causing earthquakes.
23. Study of the earth.

1. The water on the earth and in the atmosphere.
3. Another name for earth.
5. Theory that the continents were once all together, but over Millions of years have moved/drifted and are still moving at about 1-2 inches per year.
6. Near a Subduction Zone the plate moves under the crust and is dissolved in the _____?
8. The center most part of the earth that is solid.
9. A crack in the earth's crust.
11. The mantle of the earth is __________ ?
15. What type of plate is under the Ring of Fire?
19. Process in which rock are broken down into smaller pieces by the effects of weather.
20. Part of the earth that supports life.
21. What tells the history of the earth and animal placement?