Layers of the Earth

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