Across
- 4. these currents are the driving force behind plate tectonics
- 6. mountains that have compressed layers
- 7. rupture in the earth's crust which allows magma to reach the surface
- 8. the inside of the earth is under extreme heat and ____________
- 9. plates that move apart
- 11. plates that move together
Down
- 1. rocks created "by fire"
- 2. rocky outer layer that includes the crust and upper mantle
- 3. plastic, lower mantle layer
- 5. section of the earth's crust
- 10. synonym for layers