Rain forests only cover around 2 percent the total surface area of the Earth, but really about 50 percent of the plants and animals on the earth live in the rain forest.
The desert biome is an ecosystem that forms due to the low level of rainfall it receives each year. Desertscover about 20% of the Earth. There are four major types of desert in this biome - hot and dry, semiarid, coastal, and cold. They are all able to inhabit plant and animal life that are able to survive there.
Antarctica is the coldest, windiest, highest and driest continent on Earth.
The dictionary defines a mountain as that which is 'higher and steeper than a hill'. A mountain is a land form that rises high above the surrounding terrain in a limited area. They are made from rocks and earth. Generally, mountains are higher than 600 meters.