Layers of the Earth

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Across
  1. 3. rock that makes up the oceanic crust
  2. 4. icy bodies that slammed into early earth
  3. 10. part of the core that is liquid
  4. 12. settling into layers due to density
  5. 16. solid layer that "flows"
  6. 17. rock that makes up the continental crust
  7. 18. outermost physical layer
  8. 19. second planet from the sun
  9. 20. rocky planet closest to the sun
Down
  1. 1. Earth is approximately 4.6 _____ years old
  2. 2. Earth's outermost compositional layer
  3. 5. make waves that allow us to study the earth
  4. 6. 4th planet from the sun
  5. 7. force responsible for pulling earth together
  6. 8. planet we live on
  7. 9. what happens to Temp and pressure as you move toward the core
  8. 11. iron and this dense element make up the core
  9. 13. part of the core that solid
  10. 14. Earth's thickest layer
  11. 15. physical layer known as the lower mantle