Identify the winter solstice, summer solstice, vernal equinox, and autumnal equinox in the picture. Briefly describe the position of the Earth in relation to the sun and the time of year each event occurs. 
A.________B.________C.________D.________
What will be an ideal response?
A. Winter solstice: At the time of the winter solstice, the northern hemisphere tilts away from the sun. This occurs in December.
B. Autumnal equinox: At the time of the autumnal equinox, the sun aims directly at the equator. This event occurs in September.
C. Summer solstice: At the time of the summer solstice, the northern hemisphere tilts toward the sun. This event occurs in June.
D. Vernal equinox: At the time of the vernal equinox, the sun aims directly at the equator. This event occurs in March.
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