in windy places
Mars is known as the red planet. The planet itself is mostly rock. It is the thin atmosphere that is mostly carbon dioxide.
wind energy is mostly used in texas
Ceres, which is not truly a planet, has no atmosphere and therefore no wind.
The wind erosion is mostly responsible for the shape of planet Mars as well as the space debris that impact Mars.
To put it simply, wind is not air, but the movement of mass quantities of air. Wind is found anywhere where there is a great enough imbalance of air pressure. Air pressure imbalances are mostly caused by following factors: differential heating by the sun and the rotation of the planet.
None. By definition a rocky planet is mostly rock. Venus, by far, has the densest atmosphere of the terrestrial planets, but the planet itself is mostly rock and is similar in composition to Earth.
Mostly planet Earth...
no
Planet Earth - about 80%.
On our planet wind and rain have eroded virtually every surface feature. Other forces have also been at work, plate tectonics and random interplanetary impactors such as comets and asteroids, but wind and rain/show erosion has the most global extent.
Mercury is a rocky planet.
Electricity, mostly.