The Moon

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The Moon
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Lunar Surface

• maria smooth, dark areas of the moon- reflect
  little light
• maria are plains of dark solidified lava

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• craters bowl-shaped depressions on the moon
• lunar craters are formed from impacts of debris

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• regolith layer of dust and rock that covers the
  moons surface

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Interior of the Moon
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• Why does the same side of the moon always face
  us?
• Because the moon rotates and revolves at the same
  speed (27 1/3)

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Eclipses

• when one planetary body passes through the shadow
  of another

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• solar eclipse when the moon is directly between
  the Earth and the sun

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• lunar eclipse when the Earth is directly
  between the moon and the sun

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• Eclipses dont occur every month because the
  moons orbit is tilted with respect to the
  Earths orbit

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Moon Phases

• phases various shapes of the moon lighted by
  reflected sunlight

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• waxing when the size of the visible portion of
  the moon is increasing
• waning when the size of the visible portion of
  the moon is decreasing

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• new moon no lighted area of the moon is visible
  from the Earth

• full moon entire half of the side of the moon
  facing Earth is lit

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• crescent less than half of the side facing the
  Earth is lit

• gibbous more than half of the side facing the
  Earth is lit

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Waxing crescent
New moon
1st quarter
Waxing gibbous
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Full moon
Waning gibbous
Waning crescent
3rd quarter
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Tides

• tides daily changes in the level of the oceans
• -caused by the moons gravitational pull
• -tide changes every 6 hours

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Tide animation The spinning Earth within a
slightly elliptical ocean results in the rising
and falling of the ocean surface, with respect to
the land, over the course of a day. For each 24
hour period there are two high tides and two low
tides as the Earth rotates through each of the
two bulges of the the ocean surface
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• spring tide tide with maximum daily tidal range
  that occurs during new and full moons

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• neap tides tides with minimum daily tidal range
  that occurs during 1st and 3rd quarter moons

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