It is a rocky planet that is much smaller and colder than earth.
No!
It is a rocky planet but smaller and colder than the earth
It's a rocky planet, but is much smaller than earth and colder.
Earth is the largest rocky planet. After Earth is Venus, then Mars, and then the smallest, Mercury.
Mercury, Venus, Earth, and Mars they are the rocky planets
They are rocky planets.
Mars IS a rocky planet
Venus, mars.
Mars is a rocky planet. The rocky planets are Mercury, Venus, Earth and Mars. Dwarf planets like Pluto may contain rock, but also presumably much ice.
Yes. Mars is a dry, rocky planet somewhat smaller than Earth.
No, Mars is only about half the size of Earth and it is a solid, rocky planet.
The red planet, Mars.