An open tract of land where the index plants are grasses. The soil is rich in humus. Rainfall is between 10-30 inches per year. Prairies may be tropical or temperate. A large land area made up of a cluster of living organisms in a particular enviroment.
Prairies are warm in summers and cold in the winters.
In the winter they can get to -40 degrees F. Prairies go from the Appalachian mountains to the Rockies. They also go from central Texas to southern Saskatchewan. There are three main types of grasses growing on the prairie. They are tall grass, mixed grass, and short grass. Back when Indians owned the prairie they would burn it.