1. To review the mechanism of plate tectonics, do Interactive Exercise 6-2 and print out or sketch the completed diagram. 2. How do we know about Earth’s interior, given that the deepest wells and...

1. To review the mechanism of plate tectonics, do Interactive Exercise 6-2 and print out or sketch the completed diagram.

2. How do we know about Earth’s interior, given that the deepest wells and mines extend only a few kilometers into its crust?

3. Describe the interior structure of Earth.