Earth Sun Moon

Craters

Bowl shapped deppresions on the moons surface from impacts with metroids

Waxing

The period of the moon which the lit surface becomes more visible

Maria

Large, dark, sections of smooth volcanic rock on the Moon's surface

Tides

The regular rise and fall of the water level along a shore

Waning

The period during which the visible surface of the moon decreases

Phase of the moon

The shape of the moon we see from the earth

Solar eclipse

An event that occurs when the moon passes between the sun an the earth, and the moon fully or partially blocks the sun

Lunar eclipse

An event that occurs when. The earth passes between the sun and the moon, and earth's shadow covers the moon

Gravity

A natural force that attracts all objects