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14 Cards in this Set

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waxing
To increase gradually in size. The illuminated part of the moon is getting bigger.
waning
To decrease gradually in size. The illuminated part of the moon is becoming smaller
gibbous
More than half, but less than fully illuminated (reflecting light)
crescent
Having concave and convex edges terminating in points
full moon
Fully illuminated
new moon
The moon’s unilluminated side is facing the Earth
quarter
One-half of the Moon (facing the Earth) appears to be illuminated.
maria
Large dark areas on the moon
Crater
A bowl-shaped depression in a surface
Satellite
A celestial body that orbits a planet
Orbit
To revolve around something
Gravity
The natural force of attraction exerted by a celestial body
Eclipse
One celestial body is blocked out by another.
Tide
The rise and fall of the surface level of the oceans, bays, gulfs, inlets, and estuaries, caused by gravitational attraction of the moon & sun