Across
- 3. The major metal in the earth's core
- 5. One of several sheets that covers something
- 7. The deepest layer, made of hot metals
- 8. Currents that cause the mantle to "flow"
- 9. Hot molten rock, lava
- 11. The planet where we live
- 13. As you go deeper, this measure of heat increases
- 15. 70% of the earth's surface
Down
- 1. Hole in the crust where magma becomes lava
- 2. As you go deeper, things become more compressed
- 4. A minor metal in the earth's core
- 6. As you go deeper, things become harder
- 10. Thick layer made of hot, molten rock
- 12. The top layer of the earth
- 14. 30% of the earth's surface