Tundra
In physical geography, 'tundra' is an area where the tree growth is hindered by low temperatures and short growing seasons. In all of these types, the plants are mostly grass, moss, and lichens. Trees grow in some of the tundra. The boundary between the tundra and the forest is known as the tree line or timberline. The area itself encircles the Arctic Ocean of the Northern Hemisphere. The climate in a tundra biome consists of freezing cold and dryness in the winter and cold summers. The tundra ground is a barren place, often covered with rocks. Most water on the tundra is frozen within the soil.