Rotation & Revolution

It takes approx. 8 minutes for light to travel from the Sun to the Earth.  <-- (You need to know this)

Equator - The people here get 12 hours of daylight and 12 hours of darkness all year long.

Pennsylvania - Here where we live:
                             - In the summer we get approx. 16 hours of daylight 
                             - In the winter we get approx. 8 hours of daylight

QUIZLET FLASH CARDS  -  Rotation / Revolution / Earth's Imaginary Lines

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The energy that the Sun (and all stars) gives off is known the Electromagnetic Spectrum.
G X U V I M R    -   (Electromagnetic Spectrum)