moon phases - cabarrus county schools
TRANSCRIPT
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Moon
Phases
6.E.1.1 Explain how the relative motion
and relative position of the sun,
Earth and moon affect the seasons,
tides, phases of the moon, and eclipses.
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Motions of the Moon
• Just as Earth rotates on its axis and revolves
around the Sun, the Moon rotates on its axis and
revolves around Earth. The Moon’s revolution
around Earth is responsible for the changes in
its appearance. If the Moon rotates on its axis,
why can’t you see it spin around in space?
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• The reason is that the
Moon’s rotation takes
27.3 days—the same
amount of time it takes to
revolve once around
Earth. Because these
two motions take the
same amount of time, the
same side of the Moon
always faces Earth.
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– Because the moon
revolves around Earth
and rotates at the same
rate, this is why we
always see the same
side of the moon.
– The moon seems to
shine because it reflects
sunlight.
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The revolution of the Moon around the
Earth makes the Moon look as if it is
changing shape in the sky.
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This is caused by
the different
angles from
which we see the
lighted part of
the Moon's
surface. These
are called
"phases" of the
Moon.
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Earth’s Satellite
Moon Phases
New Moon Waxing Crescent 1st Quarter Waxing Gibbous
Full Moon Waning Gibbous 3rd Quarter Waning Crescent
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A complete cycle of moon phases takes
about 29.5 days, two days longer than
it takes the Moon to circle Earth. The
difference is related to Earth’s
movement. It takes about two days for
Earth, Sun, and Moon to return to their
same relative positions.
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The phases always follow one another in the same order:
New Moon
Waxing Crescent
First Quarter
Waxing Gibbous
Full Moon
Waning Gibbous
Third Quarter
Waning Crescent
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New Moon
The lighted side of the Moon faces away
from the Earth. This means that the Sun,
Earth, and Moon are almost in a straight
line, with the Moon in between the Sun
and the Earth. The Moon that we see
looks very dark
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New Moon
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Waxing Crescent Moon
This Moon can be seen after the New Moon,
but before the First Quarter Moon. The
crescent will grow larger and larger every
day, until the Moon looks like the First
Quarter Moon.
("Waxing" means increasing, or growing
larger.)
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Waxing Crescent Moon
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First Quarter Moon
The right half of the Moon appears lighted
and the left side of the Moon appears
dark. During the time between the New
Moon and the First Quarter Moon, the part
of the Moon that appears lighted gets
larger and larger every day, and will
continue to grow until the Full Moon.
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First Quarter Moon
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Waxing Gibbous Moon
This Moon can be seen after the First
Quarter Moon, but before the Full
Moon. The amount of the Moon that we
can see will grow larger and larger every
day.
("Waxing" means increasing, or growing
larger.)
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Waxing Gibbous Moon
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Full Moon
The lighted side of the Moon faces the
Earth. This means that the Earth, Sun, and
Moon are nearly in a straight line, with the
Earth in the middle. The Moon that we see
is very bright from the sunlight reflecting
off it.
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Full Moon
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Waning Gibbous Moon
This Moon can be seen after the Full Moon,
but before the Last Quarter Moon. The
amount of the Moon that we can see will
grow smaller and smaller every day.
("Waning" means decreasing, or growing
smaller.)
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Waning Gibbous Moon
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Third (Last) Quarter Moon
Sometimes called Third Quarter. The left
half of the Moon appears lighted, and the
right side of the Moon appears
dark. During the time between the Full
Moon and the Last Quarter Moon, the part
of the Moon that appears lighted gets
smaller and smaller every day. It will
continue to shrink until the New Moon,
when the cycle starts all over again.
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Third Quarter Moon
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Waning Crescent Moon
This Moon can be seen after the Last
Quarter Moon and before the New
Moon. The crescent will grow smaller and
smaller every day, until the Moon looks
like the New Moon.
("Waning" means decreasing, or growing
smaller.)
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Waning Crescent Moon
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Waxing & Waning
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Moon
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Questions
The phase of the moon you see depends
on
A. where you are on Earth’s surface.
B. how much of the sunlit side of the
moon faces Earth.
C. how much of the moon’s surface is lit
by the sun.
D. whether or not an eclipse is occurring.
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From new moon phase to full moon phase,
you see
A. an increasing amount of the lighted
side of the moon.
B. a decreasing amount of the lighted
side of the moon.
C. the same amount of the lighted side
of the moon.
D. more of the lighted side, then less of
the lighted side of the moon.
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The amount of the lighted side of the
moon you can see is the same during
A. new moon and full moon phase.
B. new moon and first quarter phase.
C. first quarter and third quarter phase.
D. full moon and third quarter phase.
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The End!!!