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Chapter 6
The Moon
41
Science
7th Grade
06/01/2007

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Cards

Term
The force of gravity on the moon is what fraction of the gravity on the earth?
Definition
1/8
Term
What is the definition of mass?
Definition
the amount of matter an object has
Term
Why does the moon have no atmosphere?
Definition
It has no gravity.
Term
What is a maria?
Definition
Shapes formed by dark areas on the moon. They are broad plains.
Term
What is the largest Mare on the moon?
Definition
Mare Imbrium
Term
The distance from the center of the moon to the center of the earth is how far?
Definition
385,000 km
Term
How many times does the moon rotate during one revolution around the earth?
Definition
once
Term
During the first half of the lunar month the moon is said to be:
Definition
waxing
Term
The moon must be in what phase of its cycle for a total lunar eclipse to take place?
Definition
Full phase
Term
What is the longest that a solar eclipse can walk?
Definition
1 hour and 40 minutes
Term
The idea that the earth and moon both accumulated from the same original cloud of dust and gas:
Definition
The Accretion Theory
Term
Compared to the earth, the average density of the moon is:
Definition
less dense
Term
The nearest natural satellite that orbits the earth continuosly is the:
Definition
moon
Term
The moon shines by ________ the light of the sun.
Definition
reflecting
Term
The ________ is the line that divides the light and dark sides of the moon.
Definition
terminator
Term
What is the name of the crater, found by the moon's south pole?
Definition
Tycho
Term
What are rills?
Definition
Large, narrow, valleys on the surgace of the moon
Term
What is the length of the lunar month?
Definition
29 1/2 days
Term
The cusps of a crescent moon point ______ from the sun.
Definition
away
Term
The copper colored moon that usually occurs around September 21-23
Definition
harvest moon
Term
An eclipse of the _______ occurs when the moon is between the earth and the sun.
Definition
sun
Term
It is very rare to see what kind of eclipse?
Definition
a total eclipse
Term
In a lunar eclipse the ______ is between the _____ and the sun
Definition
earth, moon
Term
The capture theory says what?
Definition
The earth captured the moon from the sun
Term
What are the two motions of the moon?
Definition
Rotation and Revolving.
Term
What is a crater?
Definition
Depressions on the surface of the moon surrounded by circular walls
Term
What is a crater?
Definition
Depressions on the surface of the moon surrounded by circular walls
Term
What is an occult?
Definition
When the moon blocks a star's light by passing in front of it.
Term
What is a ray?
Definition
bright streaks
Term
What is an apogee?
Definition
the most moon's most distant point from earth
Term
What is a perigee?
Definition
The point in the moon's orbit where it is closest to earth
Term
What are cusps?
Definition
The points of a crescent moon.
Term
What is earthshine?
Definition
Sunlight that reflects from the earth to the moon and back again
Term
Is the moon more sperichal than the earth?
Definition
Yes
Term
what is an eclipse?
Definition
When one astronomical body is in the shadow of another
Term
True or False: The moon's diameter is a little less than the width of the United States
Definition
TRUE!!!!!!
Term
Is the Earth or the moon more spherical?
Definition
THE MOON :)
Term
True or False
The moon's escape velocity is low because of its weak gravitational pull
Definition
true
Term
Are the back side and the dark side of the moon the same thing?
Definition
No, the back side is the side facing away from the earth and the dark side is the side facing away from the sun.
Term
True or False:
The moon always keeps the same side facing the earth
Definition
True
Term
It takes the moon ____ days to make a complete revolution around the earth as veiwed from a nearby start.
Definition
27 1/3
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