Grasslands are found where there is not enough regular rainfall to support the growth of a forest. They are usually found between forests and deserts. There are two different types of grasslands: tropical and temperate. Grasslands in the southern hemisphere usually get more precipitation than those in the northern hemisphere. Grasses can grow more than 7 feet. Animals that live in grasslands have adapted to the dry, windy conditions. Fires, both natural and human-caused, are important in grasslands. They are able to survive fires because they grow from the bottom instead of the top. They tend to have different names. For example, in the U.S. Midwest, they're known as prairies. In South America, they're called pampas, and in Central Eurasia they are referred to as steppes. In Africa they're named savannas. About one quarter of the Earth's land is covered with grasslands.
Above you see a temperate grassland. http://www.biologyreference.com/images/biol_02_img0210.jpg
Above you see a tropical grassland. http://room42.wikispaces.com/file/view/savanna_2.jpg/33513641/savanna_2.jpg