Rock.
Uranus is mostly gas by volume, however there is a solid inner core of the planet that is composed of ice and rock.
Mercury is a rocky planet.It's actually a rock because it is one of the inner planets that are all made of rock.The planet Mercury is a dense, rocky, airless world.
a rocky planey, because it ins one of the inner planets, AND it is made out of rock, not gas!
Mars is an inner planet, located between Earth and the asteroid belt. The inner planets are rocky and terrestrial, while the outer planets are gas giants.
Jupiter is a gas planet (or a gas giant).
Mars is a rocky planet.....the 4 inner planets are rocky and the 4 outer planets are gas (gas giants)
they are made of rock rather that gas or iceThey are small and have rocky surfaces.its there size and so is for outer planets
rock not gas
It is gas
A terrestrial planet, telluric planet or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun.A gas giant (sometimes also known as a jovian planet after the planet Jupiter, or giant planet) is a large planet that is not primarily composed of rock or other solid matter. There are four gas giants in the Solar System: Jupiter, Saturn, Uranus, and Neptune. Many extrasolar gas giants have been identified orbiting other stars.
Earth is a rocky planet because the gas giants are in the outer planets and earth is in the inner planet.
The inner planets are mostly made of iron and rock.