2. 1. Rotation-spinning of earth on it’s axis (imaginary line going through the center of the earth) 2. Revolution-movement of the earth (or any other celestial object) around the sun

3.  Day and night  Coriolis Effect (geocentric model cannot explain)  Foucault Pendulum (geocentric model cannot explain)

4. Causes: (seasons) a.Revolution b.Tilt of the earth (23.5°) c.Parallelism-earth is always tilted in same direction as it orbits the sun Drect Ray+Vertical Ray Most intense rays of the sun

5. March 20 or 21 June 21 or 22 Sept. 22 or 23 Dec. 21 or 22 12/12h15/9h12/12/h9/15h middleshortest middlelongest 0=the equator 23.5 N Tropic of Cancer 0=the equator 23.5 S Tropic of Capricorn noneTowards the sun none Away from the sun Refers to NH

15.  Which motion causes day and night?  Which motion causes the seasons?