Inner Planets

This planet is nearest to the sun.

• Earth

• Mercury

• Venus

• Mars

This is the second planet from the sun.

• Mercury

• Earth

• Mars

• Venus

This is the third planet from the sun.

• Mars

• Mercury

• Earth

• Venus

This is the fourth planet from the sun.

• Mars

• Earth

• Venus

• Mercury

This is a tiny rocky planet not much larger than Earth's moon.

• Mars

• Earth

• Mercury

• Venus

This planet has been called Earth's twin because it is the same size as Earth and the orbit is next to Earth's orbit.

• Mars

• Venus

• Earth

• Mercury

This is the only planet in the solar system that is known to support life.

• Earth

• Mars

• Mercury

• Venus

This planet is called the Red Planet because it is covered with red rocks and soil that contain rust.

• Earth

• Mars

• Mercury

• Venus

The area in between the inner planets and the outer planets is called the ______.

• moon

• Sun

• solar system

• asteroid belt

Which is true of the inner planets?

• They are made of frozen gases.

• They are made of rocky materials.

• They have no moons.

• They orbit the asteroid belt.