Earth's Structure and Rocks

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Across
  1. 3. ___________boundaries are where plates break apart
  2. 6. __________rock forms when other rocks go through extreme heat and pressure.
  3. 7. ___________rock forms from magma or lava that hardens.
  4. 10. _________boundaries are where plates crash together
  5. 12. This layer includes the crust and tectonic plates.
  6. 13. This is the hardest mineral on the planet.
  7. 14. Extremely hot,innermost layer of metal.
  8. 16. Melted rock that escapes to earth's surface.
  9. 18. _________boundaries are where plates grind past each other.
  10. 20. These igneous rocks form on the surface of earth.
Down
  1. 1. These igneous rocks form inside the earth.
  2. 2. These are what form rocks, over 4000 of them.
  3. 4. This is the largest tectonic plate.
  4. 5. This is a layer of partially melted rock in the mantle.
  5. 8. The thin,cool,outermost layer of the earth
  6. 9. These giant plates of rock float on the asthenosphere.
  7. 11. _________rock forms from bits of sand,rock, and minerals.
  8. 15. Melted rock within the earth.
  9. 17. The thickest layer of the earth.
  10. 19. These are formed when minerals replace bones.