Across
- 4. theory that explains how large pieces of Earth’s lithosphere move and change Earth’s surface
- 6. force that moves plates away from a mid-ocean ridge
- 8. transfer of heat by the movement of material due to differences in density
- 9. process in which one tectonic plate sinks beneath another
Down
- 1. rigid outer layer of Earth made of the crust and upper mantle
- 2. boundary where two tectonic plates move toward each other
- 3. boundary where two tectonic plates move away from each other
- 5. boundary where two tectonic plates slide past one another
- 7. force caused by a sinking plate pulling the rest of the plate with it