Seasons and shadows

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Across
  1. 3. The measure of the force of gravity on an object is
  2. 5. The larger part of a shadow
  3. 6. is a slightly elongated circle, or eclipse
  4. 8. When the moon passes directly between the earth and the sun
  5. 11. The movement of one object around another
  6. 12. diffrent shapes of the moon
  7. 13. attracts all objects toward each other
  8. 14. "equal night"
Down
  1. 1. to push or pull
  2. 2. occurs at full moon
  3. 4. tendency of an object to resist a change in motion
  4. 7. The amount of matter in an object
  5. 9. is a system of organizing the time and dates.
  6. 10. either of the two times in a year
  7. 15. darkest part of a moons shadow