Deserts
What are Deserts?
Deserts cover about 20 percent of Earth’s land surface. All the continents have them.
Deserts differ greatly in their land features. They may include dunes of shifting sand, mountains, bare rock, and plains of gravel and boulders.
Cold deserts are farther from the equator than hot deserts. Though they are very dry, the main reason they have few plants is that it is so cold there.
Articles:
Videos: