Earth and its movement

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Across
  1. 2. the Earth is split into two of these
  2. 5. the days of the year when daylight is the same as night
  3. 7. the season when days are the longest
  4. 9. the longest or shortest day of the year
  5. 12. this makes day and night
  6. 13. imaginary line through the middle of an object
Down
  1. 1. the season when days are short
  2. 3. an imaginary line that separates the Earth into North and Sounth
  3. 4. this is the movement of on object around another
  4. 6. 365 days
  5. 7. this is what the Earth orbits around
  6. 8. the object that revolves around Earth
  7. 10. this is the force that attracts on object to another
  8. 11. also known as the Red Planet