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Today’s Objective:

What Causes the Phases of the Moon?

Do Now:

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The moon has phases because of the angle at which we view its illuminated surface. (which is a result of reflected sunlight)

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The phase changes because the moon revolves around the earth.

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  • Waxing – an increasing in the visible portion of the moon.

(wax on = get bigger)

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  • Waning – a decreasing in the visible portion of the moon.

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From outer space the moon is always HALF illuminated.

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We only see phases because of our perspective from earths surface.

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Apparent view from Earth

View from Space

Directions: Shade in the apparent view (or phase) of the moon at each position

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Phases of the Moon

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Solar Eclipse:

  • Occurs when the moon moves in a line directly between Earth and the Sun.

  • The moon casts a dark shadow on Earth.
  • You cannot see the SUN from the shaded part of the Earth.

☺

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Solar Eclipse

http://www.youtube.com/watch?v=_201ttTSG30&safe=active

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Lunar Eclipse

  • Occurs when the moon moves into Earths shadow.
  • The MOON appears to change color during a lunar eclipse.

☺

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Lunar Eclipse

http://www.youtube.com/watch?v=49O2MsT1txU&safe=active

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Solar Eclipse