Gadola 4 ID

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Across
  1. 4. 4 miles thick, more dense
  2. 8. Classifies larger densities towards the center
  3. 10. 1500 miles thick
  4. 11. Top part of the mantle
  5. 12. When the Earth makes one complete revolution around the sun
  6. 13. The longest day of the year
  7. 14. First day of spring in the Northern hemisphere
  8. 15. 15-40 miles thick, less dense
Down
  1. 1. Divides the Earth into the Northern and Southern hemisphere
  2. 2. Time required for the Earth to rotate once relative to the stars
  3. 3. Rock beneath the crust
  4. 5. Between upper crust and mantle
  5. 6. 1800 miles thick, consists of oxygen, magnesium and silicon
  6. 7. When the Northern hemisphere is furthest from the sun
  7. 9. 1300 miles thick