Earth Moon Sun System Crossword

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Across
  1. 3. imaginary line
  2. 5. oval shape
  3. 6. bright night
  4. 7. twice a year
  5. 10. shaded region
  6. 13. It's round
  7. 15. moon appears darkened
  8. 17. illuminating area increases
  9. 18. same length of day/night
  10. 19. dark night
Down
  1. 1. sun gets blocked by moon
  2. 2. circular path
  3. 4. bigger than semicircle and less circle
  4. 8. curved shape
  5. 9. dust rock and ice trail
  6. 11. phase of moon
  7. 12. it's half round
  8. 14. turning
  9. 16. illuminating area decreases