Night and Day

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Across
  1. 3. rotate
  2. 5. sunlight
  3. 7. shadow
  4. 11. light
  5. 12. axis
  6. 13. stars
  7. 15. revolution
  8. 18. sunrise
  9. 19. night
  10. 20. moon
Down
  1. 1. heat
  2. 2. seasons
  3. 4. daytime
  4. 6. hemisphere
  5. 7. southern
  6. 8. orbit
  7. 9. nighttime
  8. 10. day
  9. 13. sun
  10. 14. northern
  11. 16. equator
  12. 17. around