Four planets are rocky. They are Mercury, Venus, Earth and Mars.
Mercury is the closest planet to the sun. It is the smallest.
Venus is the second planet from the sun.
Venus is the hottest planet of all.
Earth is the third planet from the sun.
Earth has one moon.
Mars looks red. Iron in its rocks and dust has rusted.
Mars has two moons. They are named Phobos and Deimos.
Words to know
- rocky: made of rock
- planet: a space world
- closest: nearest
- rusted: turned red-brown
