1. Why Earth has seasons

2. Moving into new part of physical geography

4. Earth Revolves Around the Sun every 365.26 days

5. Rotates every 24 hours, counterclockwise looking at North Pole

6. On the plane of the Ecliptic

7. Distance from the Sun is NOT the cause of seasons

8. Axial tilt is the reason for the season

9. Classroom Resources: Different Animations Explaining the Seasons

11. Axial tilt is the reason for the season: 2 reasons …1st Length of day

12. Axial tilt is the reason for the season: 2 reasons …2nd Sun Angle

13. Classroom Resources: Animations Importance of Sun Angle

14. Helpful to review key latitudes Sun overhead June 21st March 20 Sept 22 Dec 21

20. From perspective of angle of the sun

23. 24 hrs sunlight 24 hrs night 90-23.5 = 66.5 Arctic Circle Antarctic Circle

25. Challenger Accident, Jan. 28, 1986 This sent out over internet as a last image. What’s wrong?

26. Online Resources Cause of Seasons Visualizations http://serc.carleton.edu/NAGTWorkshops/visualization/colle ctions/seasons.html Elementary Free Resource

27. Summary

28. Imagery seen in this presentation is courtesy of Ron Dorn and other ASU colleagues, students and colleagues in other academic departments, individual illustrations in scholarly journals such as Science and Nature, scholarly societies such as the Association of American Geographers, city,state governments, other countries government websites and U.S. government agencies such as NASA, USGS, NRCS, Library of Congress, U.S. Fish and Wildlife Service USAID and NOAA.