By composition, group, and method of lithification. Composition is what its made of, group is whether the rock has grain of layers, and method of lithification is whether is was formed from compaction, cementation, etc<span />
Fuel cars and airplanes, power electricity plants, and heat our homes.
Earthquakes and tsunamis are caused by pressure building up in the Earth's crust along the intersection of tectonic plates, while tornadoes are created by updrafts and downdrafts interacting with wind.
The West of the United States has been one of the most important settlements in the colonial America due to its productive industries of cattle ranching and mining. In addition, the territory was coined the "Wild West" because this American Frontier had a rich history of folklore concerning gangs and outlaws.
