goog TC

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Across
  1. 6. Earth's closest point to the Sun
  2. 7. speed needed to escape Earth's gravity.
  3. 8. based off of stars' position in sky.
  4. 13. section of mantle that tectonic plates float on it.
  5. 14. day which the Sun is out the longest in a year.
  6. 16. line that differentiates the mantle and rust
Down
  1. 1. low density crust
  2. 2. dense material sinks, less dense floats.
  3. 3. Earth's farthest point from the Sun
  4. 4. path of travel around a celestial body
  5. 5. day which night lasts the longest in a year.
  6. 9. Earth's center line.
  7. 10. crust outer layer of Earth
  8. 11. equal days and equal nights.
  9. 12. high density crust
  10. 15. liquid iron layer; creates magnetic field.