The different shapes of the moon are called its:

An eclipse when the Earth is between the moon and the sun is called a:

We never see the dark side of the moon because:

We have seasons because of Earth's ________.

The two forces that combine to keep the Earth in orbit are:

The force of ___________ states that all objects are attracted to each other.

This is the movement of one object around another:

Earth rotates on its _______________________.

The path that a planet takes to revolve around the sun is its __________.

A ___________ eclipse occurs when the moon passes directly between Earth and the sun, blocking the sun's light.

The darkest part of a shadow:

The part of a shadow surrounding the darkest part.

A loose collection of ice and dust that orbits the sun, typically in along, narrow orbit.

This word describes a model of the universe in which Earth is at the center of the revolving planets and stars.

The tendency of an object to resist a change in motion.

An oval shape, which may be elongated or nearly circular. This is the shape of a planet's orbit.

An object that orbits a star, is large enough to have become rounded by its own gravity and has cleared the area of its orbit.

Day and night are caused by:

Tides are caused by the force of _________ from the sun and moon affecting Earth.

Impact areas on the surface of the moon are called:

A streak of light in the sky produced by the burning of a meteoroid in Earth's atmosphere.