A machine that leaves Earth and travels through space is a(n) _____________.

It takes Earth one __________ to complete a trip around the Sun.

A clear material that helps us see objects in more detail is a(n) _________.

A tool used to make faraway objects appear larger is a(n) ___________.

Earth and seven other planets revolve around the

Sun. They form part of a(n) __________.

The planets look like __________ because they appear to shine.

However, planets do not make their own __________ but reflect the Sun’s light.

Earth is one of the four ___________.

Inner planets are __________ to the Sun.

Inner planets are _________ than the other planets.

The four planets farthest from the Sun are called the __________.

Outer planets are __________ from the Sun.

The planet that is farthest away is __________.

To see the planets beyond Saturn, we must use a(n) _________.

There are ___________ planets that revolve around the Sun.

The names of the inner planets are Mercury, Venus, ___________ and Mars.