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polar climates ![click to hear : polar climates click to hear : polar climates](../../../images/speaker-vert.gif)
Extremely cold dry climates.
polar tundra ![click to hear : polar tundra click to hear : polar tundra](../../../images/speaker-vert.gif)
Region where the thaw lasts only four or five months and where only mosses, lichen and a few shrubs survive the cold.
polar ice cap ![click to hear : polar ice cap click to hear : polar ice cap](../../../images/speaker-vert.gif)
The Earth’s coldest region (as cold as -90°C), where the temperature, always below zero, creates a permanent ice cover.