.4%
0.4%
Asteroid
Probably it is because these materials (gases, for example) are less dense than rocky materials, and the solar wind has had a long time to push such materials farther out.
Proportionately less, yes.
Titan is a solid. The moon itself is primarily composed of water ice and rocky material.
0.4%
The Rocky mountains are, I believe, consisted of the Transform Fault movement.
ore
made from a mixture of rocky material and metals
Mars is a rocky planet, and is comprised of a lot of rocky terrain. The surface is composed of iron and has a carbon dioxide atmosphere.
Asteroid Comets are icy conglomerations of material, so cannot be called a "rocky object".
Jupiter, but why? you need to find out.
coral reef
The rocky, gritty material in a cometary nucleus is probably much like a solid asteroid in chemical profile. But most asteroids are solid, barren rock - the comet has a large percentage of ices in it.
Jupiter has a possibility to have a solid (rocky, icy) core
There is very little soil for plants to establish themselves in a rocky desert. Rocky desert where sand and stone were washed or blown away. This is usually associated with very hilly or mountainous terrain exposing very hard rocky material.
Asteroid