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Earth is a Sphere - round 3-d object◦ Aristotle Greek 350 B.C. curved shadow.
Earth is a satellite of the sun. Follows an ellipse – an elongated closed
curve. Sun is not at the center of the ellipse.
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The axis is an imaginary vertical line that the Earth spins around
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Referred to as one year
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The earth is tilted on its axis by 23.5 degrees.
Not all the earth gets the same amount of light all year.
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June 21 or 22
Sun rays hit the tropic of cancer most directly
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December 21 or 22
Sun’s rays hit tropic of Capricorn most directly.
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March 20 or 21-spring
September 22 or 23 –fall
Sun’s rays hit the equator most directly
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Short periods of climatic change caused by changes in radiation an area receives.
Winter, spring, summer, fall
Caused by tilt of earth and angle of which the sun light hits earth
Does not really occur at equator
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Is a satellite of the earth
Also rotates and revolves
Rotation and revolution takes 27.3 days to complete each.
We always see the same side of the moon
Appears to change shape called “phases”
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Happens after a New moon or no moon.
Lighted side of the moon is on the right
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Happens after a full moon
Light side of the moon is on the left
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