there are 9 planets
The four terrestrial planets in our solar system are Mercury, Venus, Earth, and Mars. These planets are composed mainly of rock and metal, with solid surfaces rather than being gaseous like the outer planets.
They have solid surfaces composed of rock.
Terrestrial planets.
Terrestrial Planets.
the found different rock on the planets
Planets are pretty much just big rocks or gas balls orbiting their sun. They are just there, until their sun explodes or another big rock hits them and destroys them.
Carbonate minerals that are comprised of crustal rock.
Not exactly--the mantle is comprised of semisolid rock, or magma.
The metamorphic rock comprising of entirely calcite is limestone.
The astrobelt is made out of giant rock that circle the sun. The astrobelt is there to separate the gas planets such as Jupiter, Saturn, Neptune and Uranus, from the rock planets such as Mars, Venus, EARTH and Mercury. P.S. If you think Pluto is still a planet, then just to let you know that Pluto is a ROCK planet despite the fact it is with the gas planets.
No, they are not, they are both rock planets.