Why Earth has seasons

Moving into new part of physical geography

Earth Revolves Around the Sun every days

Rotates every 24 hours, counterclockwise looking at North Pole

On the plane of the Ecliptic

Distance from the Sun is NOT the cause of seasons

Axial tilt is the reason for the season

Classroom Resources: Different Animations Explaining the Seasons

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

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

Classroom Resources: Animations Importance of Sun Angle

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

From perspective of angle of the sun

24 hrs sunlight 24 hrs night = 66.5 Arctic Circle Antarctic Circle

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

Online Resources Cause of Seasons Visualizations ctions/seasons.html Elementary Free Resource

Summary

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.