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The Sun-Moon-Earth System
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A lunar eclipse can only occur during the _________ _________ phase.
full moon
A _____________ eclipse occurs when the Moon moves into Earth's shadow.
lunar
A solar eclipse can only occur when the Moon is in the _________ ___________ phase.
new moon
A ____________ eclipse occurs when the Moon's shadow appears on Earth's surface.
solar
Eclipses are caused by _____________ in the solar system.
shadows
The ___________ of Earth's rotation axis is always in the same direction by the same amount.
tilt
The ___________ ____ ________________ __________________ states that the pull of gravity between two objects depends on the masses of the objects and the distance between them.
Law of Universal Gravitation
Each makes one complete revolution around the Sun every _________________.
365.24 days
The path that an object follows as it moves around another object is called an ____________.
orbit
The rotation of Earth helps to produce the cycle of __________ and ___________.
day, night
One complete rotation of Earth takes about ___________________.
24 hours
The line on which Earth rotates is called its ______________ ________.
rotation axis
A spinning motion is called a ___________________.
rotation
Describe what the waning crescent phase looks like.
A small sliver of the Eastern near side of the Moon is visible.
Describe what the third quarter phase looks like.
The Eastern half of the near side of the Moon is visible.
Describe what the waning gibbous phase looks like.
Most, but not all, of the Eastern near side of the Moon is visible.
Describe what a full moon looks like.
All of the near side of the Moon is visible.
Describe what the waxing gibbous phase looks like.
Most, but not all, of the Western near side of the Moon is visible.
Describe what the first quarter phase looks like.
The Western half of the near side of the moon is visible.
Describe what the waxing crescent phase looks like.
A small sliver of the Western near side of the Moon is lit.
Describe what a new moon looks like.
None of the moon is visible.
Which side of the Moon, east or west, is lit during the waning phases?
east
Which side of the Moon, east or west, is lit during the waxing phases?
west
How much of the Moon is light during a New Moon?
none of it
How much of the Moon is lit during a Full Moon?
all of it
How much of the Moon is lit during a First or Third Quarter Moon?
half
During the waning phases, are more or less of the Moon's near side lit each night?
less
During waxing phases, are more or less of the Moon's near side lit each night?
more