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Across
  1. 2. Movement of animals from one region to another
  2. 4. Season before autumn in the Northern Hemisphere
  3. 5. The path Earth takes as it travels around the Sun
  4. 8. Half of the Earth, either Northern or Southern
  5. 10. State of equal day and night during the equinox
  6. 11. Season that begins with the fall equinox in the Northern Hemisphere
  7. 12. Energy and light received from the Sun
  8. 13. Gathering of crops, often celebrated at the equinox
  9. 14. Unit used to measure Earth’s tilt
  10. 16. The 23.5-degree lean of Earth’s axis
  11. 17. Period of time without sunlight
  12. 19. Divisions of the year caused by Earth’s tilt and orbit
Down
  1. 1. Season after autumn in the Northern Hemisphere
  2. 3. Hemisphere that experiences autumn after the fall equinox
  3. 6. Period of time when the Sun is above the horizon
  4. 7. Month when the spring equinox occurs
  5. 9. Hemisphere that experiences spring during the fall equinox
  6. 12. Month when the fall equinox usually occurs
  7. 15. Event when day and night are nearly equal in length
  8. 18. Imaginary line Earth spins around