Continental Drift

2. Wegner thought the continents looked like these that could all fit togheher
7. Earths outermost layer
8. He noticed that these lined up when he reassebled the continents
10. Where the convection currents are found
11. This is wegners theory
14. Why scientists know about the composition and thickness of layers we have never seen or drilled to. (earthquakes)
16. The layer under the lithosphere
17. Alfred Wegners main occupation was as a ...

1. The only liquid layer
3. We now know these things are what is really moving, its not just land masses
4. A large continent composed of all land masses 200 million years ago
5. Earths innermost layer
6. Wegners theory is the beginning of this much bigger theory
9. These things are what move the plates because of heating and cooling
12. This is another name for the plates, a layer of the earth
13. Wegners first name
15. Scientists couldn't understand why these were found is small groups spread aroud the world