Reasons for seasons

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Tilt and revolution

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Reasons for seasons

  1. 1. The Reasons for the Seasons
  2. 2. January
  3. 3. February
  4. 4. March
  5. 5. April
  6. 6. May
  7. 7. June
  8. 8. July
  9. 9. During Our Summer <ul><li>The Northern Hemisphere leans toward the Sun in its revolution, there are more daylight hours, and the Sun’s angle is more perpendicular to us than at other times of year. </li></ul><ul><li>The longer days and more concentrated sunlight result in more heating. </li></ul>
  10. 10. August
  11. 11. September
  12. 12. During Our Spring and Fall <ul><li>The Earth leans neither toward nor away from the Sun; daylight and nighttime hours are more equal and temperatures are moderate. </li></ul>
  13. 13. October
  14. 14. November
  15. 15. During Our Winter <ul><li>The Northern Hemisphere leans away from the Sun, there are fewer daylight hours, and the Sun hits us at an angle; this makes it appear lower in the sky. </li></ul><ul><li>There is less heating because the angled Sun’s rays are “spread out” rather than direct. </li></ul>
  16. 16. December
  17. 17. Resources Used <ul><li>http://astro.unl.edu/naap/motion1/animations/seasons_ecliptic.swf </li></ul><ul><li>www.learner.org </li></ul>

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