The Tundra is very cold. The average temperature is 10 to 20 degrees.
The Tundra is at the top of the world, at the North Pole. It covers one-fifth of the world.
The ground under the thin layer of soil is always frozen.
Summers are very short so things grow for only a short time.
There is no water during most of the year.
There is hardly any rain during the year.