Across
- 4. Who came up with the theory of seafloor spreading?
- 5. What drives seafloor spreading?
- 6. What layer of the earth has convection currents?
- 7. What is being moved by the convection currents?
Down
- 1. What do divergent boundaries create when under the sea?
- 2. What layer of the earth contains the plates?
- 3. What is the name of a boundary with two plates moving away from each other?