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Phases

The different shapes of the moon you see from Earth

eclipse

when an object in space comes between the sun and a third object, it casts a shadow on that object

solar eclipse

occurs when a new moon blocks your view of the sun

umbra

the very darkest part of the moon's shadow

penumbra

The larger part of the shadow

lunar eclipse

occurs at a full moon when earth is directly between the moon and the sun

tides

the rise and fall of ocean water that occurs every 12.5 hours or so

spring tide

Their combined forces produce a tide with the greatest difference between consecutive low and high tides

neap tide

a tide with the least difference between consecutive low and high tides

maria

The moon's surface has dark, flat areas

craters

moons surface is marked by large round pits

meteoroids

chunks of rock or dust from spate

telescope

a device built to observe distant objects by making them appear closer

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