Earth-Moon System Vocab

Front

Light-colored, mountainous, heavily cratered area of the Moon, made mostly of lunar breccias.

Back

Moon highland

Front

Point in the moon's orbit nearest to Earth.

Back

perigee

Front

Long trail of ejecta

Back

Ray

Front

Moon's orbital and rotation periods are the same

Back

synchronous rotation

Front

Large, dark, flat areas on the Moon

Back

maria

Front

Days when the sun is farthest north or south of the equator

Back

solstice

Front

Plane of Earth's orbit around the Sun

Back

ecliptic plane

Front

Material falling back to the lunar surface after being blasted out by an impact.

Back

ejecta

Front

Equinox: Times of year (Sept 22, Mar 20) when days and nights are equal (12 hours).

Back

True

Front

Moon passes between Sun and Earth, casting shadow → lunar eclipse

Back

False