Plate Tectonics

2. __________ Wegener was the first person to suspect that the continents may in fact be moving.
4. The ____________ is solid. It is made up of the lower part of the chemical mantle.
7. _________ layers are also called chemical layers.
9. The _________ is the middle layer. It is made up of rocks made mostly of iron and magnesium.
10. The _____________ is solid. It is made up of the chemical crust and upper mantle.
11. The _________ is the least dense layer. It is made up of rocks made mostly of oxygen, silicon, and aluminum.
12. The _______ (inner and outer) is the most dense layer. It is made up of rocks made mostly of iron and nickel.

1. ___________ layers
3. The ________ is the least dense layer. It is made up of rocks made mostly of oxygen, silicon, and aluminum.
5. reason the continents look like puzzle pieces is because they are.
6. The ____________ is liquidy. It is made up of the middle part of the chemical mantle.
8. To understand the mechanics of moving continents, we’ll have to go ________ the Earth.