Across
- 1. is caused when new crust pushes the rest of the plate out of the way
- 5. is a bunch of volcanoes in a ring shape
- 6. plate tectonics float on these
- 8. are caused when plate tectonics rub against each other
- 9. the top layer where tectonic plates move about
Down
- 2. where old cold plates fall into
- 3. collisions of plate tectonics create these
- 4. the Earths surface is split into many
- 6. is recycled when magma erupts out of a volcano
- 7. the hotter, rocky layer under the crust