Imaginary line that divides Earth into northern and southern hemispheres

Day when Earth's axis is not leaning toward or away from the sun

Entire lit side of the moon is visible from Earth

Shape of the moon that is greater than a quarter but not 'full'

Imaginary lines that show distance north or south of the equator

Occurs when the moon moves into the Earth's shadow

Lit part of the Moon (or planet) that can be seen from Earth

Path an object follows as it moves around another object

A tide at the first or third quarters of the moon; when there is the least difference between high and low tide

No moon is visible because the sun is only illuminating the side of the moon that is facing away from the Earth

Lighter part of the shadow where light is partially blocked

Motion of an object around another object.

The spinning motion of an object on it's axis

An imaginary line that passes through Earth's core from the North and South pole

Occurs when the Moon's shadow appears on Earth's surface

A day when Earths rotation axis is the most toward or away from the sun

A tide at new or full moon; when there is the greatest difference between high and low water

Daily rise and fall of sea level

Central, darker part of a shadow where light is totally blocked

Occurs when less and less and less of the Moon's lit side is visible from Earth

Occurs when more and more of the Moon's lit side is visible from Earth