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Moon Moon Phases PPT

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Moon  Moon Phases PPT Powered By Docstoc
					Moon & Moon Phases
     Moon & Moon Phases
• The moon is Earth’s only natural
  satellite. Its orbit around the earth
  is tilted 50.
     Moon & Moon Phases
• The Earth & moon revolve around
  each other.
     Moon & Moon Phases
• Scientists believe that the moon was
  formed when a large asteroid hit the
  Earth so hard, some of the mantle
  material was hurled into space.
     Moon & Moon Phases
• The moon (Luna) is a solid sphere of
  rocks & dust.
• The composition of the rocks is
  similar to Earth’s mantle.
     Moon & Moon Phases
• The moon
  – Rotates on its axis
  – Has a very thin atmosphere
      Moon & Moon Phases
• The moon does not generate its own
  heat & light. It reflects light from
  the sun.
            Moon & Moon Phases
   • The moon makes 1 complete revolution
     around the Earth about every 28 days
   • The moon makes 1 complete rotation
     about every 28 days.




http://www.seds.org/pub/images/plan
ets/moon/clementine/mpeg/viewers/
msdos/animations/lunar/
      Moon & Moon Phases
• Because rotation & revolution occur in
  the same amount of time – we only
  see one side of the moon
• We never see the “far side” of the
  moon
        Moon & Moon Phases
• Does the moon have day & night?
  Why?
http://www2.jpl.nasa.gov/files/images/anim/eartmo.flc
     Moon & Moon Phases
• The moon is about ¼ the diameter of
  the Earth.
• The moon & Earth are about 240,000
  miles apart.
    Moon & Moon Phases

• ESSENTIAL QUESTION

• IF HALF OF THE MOON IS
  ALWAYS LIT BY LIGHT FROM THE
  SUN, WHY DO WE NOT ALWAYS
  SEE ALL OF THE LIT HALF OF THE
  MOON?
     Moon & Moon Phases
• http://www.cmf.nrl.navy.mil/clementi
  ne/clemovies/clemovies_index.html

• Moon revolution
• http://earthsci.terc.edu/content/visu
  alizations/es2503/es2503page01.cfm
  ?chapter_no=visualization
     Moon & Moon Phases
• http://www.cmf.nrl.navy.mil/clementi
  ne/clemovies/clemovies_index.html
• Moonglow -
  http://www.cmf.nrl.navy.mil/clementi
  ne/clemovies/clemovies_index.html
      Moon & Moon Phases
• The moon is ½ lit all the time
• The relative positions of the Earth, moon,
  & sun determine how much of the lit half
  we can see

• http://www.astro.uiuc.edu/projects/data/
  MoonPhases/
     Moon & Moon Phases
• The changing shapes of the moon are
  called phases.
     Moon & Moon Phases
• The phases range from a new moon to
  a full moon (in about 14 days) then
  back to new moon (in about 28 days)
• This pattern repeats every 28 days
         Moon & Moon Phases
• Beginning with the new moon, the
  moon appears to get larger (waxing)
• After reaching full moon, the moon
  appears to get smaller (waning)




waxing                waning
     Moon & Moon Phases
• Solar Eclipse happens when the moon
  is between the sun & Earth. The
  moon casts a shadow on part of the
  Earth
     Moon & Moon Phases
• Solar Eclipse
Moon & Moon Phases
      Moon & Moon Phases

• Lunar eclipses happen when the Earth
  is between the sun & moon.
• The Earth casts a shadow on the
  moon
Moon & Moon Phases
     Moon & Moon Phases
• The gravity between the moon &
  Earth pulls on each others surface.
• The moon’s gravity pulls on the
  Earth’s surface (water & land)
• Water is easier to move & this causes
  tides in Earth’s oceans.
     Moon & Moon Phases
• The moon’s gravity pulls all through
  the earth
• The water bulges on the opposite side
  because of centrifugal force
     Moon & Moon Phases
• The position of the sun, moon & Earth
  determine the tides
    Moon & Moon Phases



High Tides               Low Tides




                                     High Tides
             Low Tides
     Moon & Moon Phases
• Notice how the tides change in
  relation to the red dot.
Moon & Moon Phases
Moon & Moon Phases
Moon & Moon Phases
Moon & Moon Phases
Moon & Moon Phases

				
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posted:1/7/2013
language:English
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