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

path an object follows as it moves around another object

motion of an object around another object

The spinning motion of a planet on its axis

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

a day when Earth's rotation axis is the most toward or away from the Sun

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

occurs when 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.

shape of the Moon that is greater than a quarter moon, but not 'full'.

shape of the Moon that is less than a quarter moon, but not 'new'.

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

entire lit side of the moon is visible from Earth.

occurs when the Moon moves into the Earth's shadow

lighter part of the shadow where light is partially blocked

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

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

daily rise and fall of sea levels

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

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

imaginary lines that show distances north or south of the equator