The path an object follows at it moves around another object.

The two days in which Earth's rotation axis is the most toward or away from the Sun.

This side of the Moon is always facing Earth.

The lighter part of the shadow where light is partially blocked.

You would expect to find the least dense materials in this main layer of Earth.

The motion of one object around another object.

The March equinox begins this season.

The Moon's revolution around Earth is produced by this.

This type of eclipse can only occur during a new moon phase.

This type of sedimentary rock forms form organisms or the remains of organisms.

This produces the Earth's revolution around the Sun.

Daylight hours are the longest during this season.

The reason we see the Moon is because it reflects light from this.

This is the primary cause for the rise and fall of Earth's oceans twice a day.

The mark left on a porcelain plate from a mineral.

This causes the Sun's apparent motion across the sky.

Earth is closest to the Sun during this month.

During these phases, less of the Moon's near side is lit each night.

This type of eclipse occurs when part of the Moon passes through the Earth's umbra.

This theory explains the constant movement of Earth's crust.

The nearest star to Earth.

The Sun is highest in the sky on this day each year.

An observer on Earth can't see this moon phase because the Moon is directly between Earth and the Sun, and only the unlit side is facing Earth.

The tidal range is the greatest during this tide.

These types of waves only travel through solids.