Observe changes in Earth's orbit that contribute to climate change
http://www.classzone.com/books/earth_science/terc/content/visualizations/es1506/es1506page01.cfm?chapter_no=visualization

TERC, McDougall Littell

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This animated visualization of precession, eccentricity, and obliquity is simple and straightforward and provides text explanations. It is a good starting place to show Milankovitch cycles.

Subject: Environmental Science:Global Change and Climate:Climate Change:Natural causes, Environmental Science:Global Change and Climate:Climate Change, Environmental Science:Global Change and Climate, Geoscience:Atmospheric Science:Climate Change:Natural causes, Geoscience:Atmospheric Science:Climate Change, Climatology :Orbital patterns, Geoscience:Atmospheric Science:Climatology
Grade Level: College Lower (13-14), High School (9-12), Middle (6-8)
Theme: Teach the Earth:Enhancing your Teaching:NGSS, Teach the Earth:Course Topics:Environmental Science, Teach the Earth:Incorporating Societal Issues:Climate Change, Teach the Earth:Course Topics:Atmospheric Science