Science crossword

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Across
  1. 6. a sudden shaking of earth's crust
  2. 8. the middle layer of earth
  3. 9. a hole in the earth where melted rocks flow out and cools to form a mountain
  4. 11. rocks formed from layers of sediment that get buried, pressed, and cemented together over a long period of time
  5. 14. melted rock that flows out to the earth's surface
  6. 15. traces or remains of living things that died a long time ago
  7. 17. rocks that have cooled and formed from melted rock
  8. 18. the moving of broken rock when weathering occurs
  9. 19. a solid object that forms crystals
Down
  1. 1. rocks formed when heat and pressure change existing stones into different rocks
  2. 2. narrow valleys with steep sides
  3. 3. melted rock inside the earth
  4. 4. cracks in earth's crust
  5. 5. huge pieces of earth's crust and mantle that move
  6. 7. boundaries the places where two plates meet
  7. 10. the top layer of earth
  8. 12. the breaking down of rocks into smaller pieces
  9. 13. tectonics the theory that explains the motion of the plates
  10. 16. the bottom layer of earth