192 Outline, Motions of the Moon

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19-2 Outline, Motions of the Moon

• Mr. Fidler

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Section Objectives

• Recognize that the moons phases are caused by
  the relative positions of the sun, the moon, and
  Earth
• Demonstrate the arrangement of the sun, the moon,
  and Earth during solar and lunar eclipses.

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Key Terms

• Solar Eclipse
• Lunar Eclipse

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Moons Rotation and Revolution

• Moon phases are the changing appearances of the
  moon as viewed from Earth
• Moon phases are caused by the moon revolving
  around Earth and the relative positions of the
  moon, Earth, and the sun

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Moons Rotation and Revolution

• The moon rotates and revolves around Earth in the
  same amount of time.
• The same side of the moon is always facing away
  from Earth

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19-2 Outline
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Solar Eclipses

• During a solar eclipse, the moon passes directly
  between Earth and the sun.
• Only people standing in the moons shadow see
  the eclipse.

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Solar Eclipses

• The dark inner shadow of the moon is called the
  umbra
• The umbra is where the suns light is completely
  blocked from view on earth
• Penumbra - The outer part of the moons shadow,
  sunlight is only partially blocked

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Solar Eclipses

• Never look directly at a solar eclipse
• The suns radiation can damage your eyes
• The moons revolution is tilted at a 5 degree
  angle
• The moon usually passes above or below the sun
  and not directly in front
• 2-7 solar eclipses happen every year, but only a
  few can see it.
• Total solar eclipses happen once every 450 years
  from any one location.

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Lunar Eclipses

• A total lunar eclipse occurs when the moon passes
  completely into Earths umbra
• During a lunar eclipse, the moon gradually
  becomes darker as it moves into Earths shadow.
• Lasts about an hour to an hour and forty-five
  minutes
• Most people in the nighttime side can see the
  eclipse.

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19-3, Tides

• Mr. Fidler

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Earth, Moon, and Ocean

• Tides are slow-moving water waves with long
  wavelengths
• This makes a rise and fall of the surface level
  of the oceans

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Earth, Moon, and Ocean

• High Tide ocean is at its highest point.
  Occurs every 12 ½ hours.
• Several hours later, more land will be exposed
• Low Tide ocean is at its lowest point about 6
  ¼ hours after high tide.

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Earth, Moon, and Ocean

• New Moon
• Full Moon
• 1st Quarter
• 3rd Quarter

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Section Objectives
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Lunar Eclipses
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Lunar Eclipses
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TEST PREP

• Do you know the direction the moon revolves in?
• Can you name each phase of the moon from a
  diagram?
• Can you draw what each moon phase looks like from
  Earth?
• Can you explain why we see moon phases?
• Can you explain the difference between waxing and
  waning?
• Can you draw and label the position of the sun,
  earth, and moon during a solar and lunar eclipse?
• Do you know why lunar eclipses are more common
  than solar eclipses?

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TEST PREP

• Do you know why we only see one side of the moon?
  (Use rotation and revolution in your answer)
• Can you explain why we have tides?
• Can you draw a diagram of the sun, earth and moon
  that would show when the highest tides occur?
• Do you know when high tides occur?
• Do you know when low tides occur?