Chapter 23
Sun-Earth-Moon
System
Key Terms
Rotation

– the spinning of
Earth on its axis (takes 24
hours )
Revolution – Earth’s
yearly orbit around the
s...
Key Terms
Ellipse

– an elongated,
closed curve (Earth orbits
the Sun this way)
Solstices
Solstice

– the day when
the Sun is farthest north
or south of the equator.
Occurs twice yearly summer & winte...
Moon Rotation/Revolution
The

Moon’s rotation takes
27.3 days – the same
amount of time it takes to
revolve once around E...
Phases of the Moon
The

phases of the Moon
depend on the positions
of the Moon, Earth, and
the Sun.
There are 8 phases.
New Moon
Occurs

when the Moon is
between Earth and the Sun.
The lighted ½ faces the Sun,
the dark ½ faces Earth.
It’s ...
Waxing Phases
Occur

after a new Moon, and
more of the lighted half of the
moon can be seen each night.
Waxing Crescent ...
Waxing
Crescent
1 Quarter Phase
st

Can

be seen about 1 week
after a new moon.
Appears to about ½ of the
lighted side of the Moon.
Waxing Gibbous
Occurs

when more than ¼
of the Moon is visible.
Full Moon
Occurs

when all of the
Moon’s surface facing Earth
reflects light.
Remember, Earth is
between the Sun and Moo...
Waning Phases
Waning

occurs after a full
moon, and you see less of
its lighted half each night.
The lighted parts will ...
Waning Gibbous
Begins

just after a full

moon.
To me, you can see about
¾ of the lighted Moon.
Third-Quarter Phase
Occurs

when you can see
only ½ the lighted side.
Waning Crescent
Occurs

when you can see a
small lighted slice on the
left side.
Will occur just before
another new moon...
 Once

you can located the New and Full
moon on a diagram always move counter
clockwise from the NEW to the FULL
phase. I...
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
Moon phaseunitpp tstudent
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Moon phaseunitpp tstudent

  1. 1. Chapter 23 Sun-Earth-Moon System
  2. 2. Key Terms Rotation – the spinning of Earth on its axis (takes 24 hours ) Revolution – Earth’s yearly orbit around the sun.
  3. 3. Key Terms Ellipse – an elongated, closed curve (Earth orbits the Sun this way)
  4. 4. Solstices Solstice – the day when the Sun is farthest north or south of the equator. Occurs twice yearly summer & winter (June 21/22 & Dec. 21/22)
  5. 5. Moon Rotation/Revolution The Moon’s rotation takes 27.3 days – the same amount of time it takes to revolve once around Earth. Thus, we always see the same side of the Moon!
  6. 6. Phases of the Moon The phases of the Moon depend on the positions of the Moon, Earth, and the Sun. There are 8 phases.
  7. 7. New Moon Occurs when the Moon is between Earth and the Sun. The lighted ½ faces the Sun, the dark ½ faces Earth. It’s in the sky but can’t be seen.
  8. 8. Waxing Phases Occur after a new Moon, and more of the lighted half of the moon can be seen each night. Waxing Crescent – can be seen about 24 h after a new moon as a thin slice.
  9. 9. Waxing Crescent
  10. 10. 1 Quarter Phase st Can be seen about 1 week after a new moon. Appears to about ½ of the lighted side of the Moon.
  11. 11. Waxing Gibbous Occurs when more than ¼ of the Moon is visible.
  12. 12. Full Moon Occurs when all of the Moon’s surface facing Earth reflects light. Remember, Earth is between the Sun and Moon.
  13. 13. Waning Phases Waning occurs after a full moon, and you see less of its lighted half each night. The lighted parts will be on the left side of the Moon!
  14. 14. Waning Gibbous Begins just after a full moon. To me, you can see about ¾ of the lighted Moon.
  15. 15. Third-Quarter Phase Occurs when you can see only ½ the lighted side.
  16. 16. Waning Crescent Occurs when you can see a small lighted slice on the left side. Will occur just before another new moon.
  17. 17.  Once you can located the New and Full moon on a diagram always move counter clockwise from the NEW to the FULL phase. If you go counter clockwise the first set of phases are the WAXING phases then after you reach the FULL moon the set of phases are the waning phases,

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