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Deserts are the most brutal areas here on Earth.
Their most fundamental characteristic is a
shortage of available moisture for plants, resulting
from an imbalance between precipitation and
evaporation. Which means they can frequently
lose more moisture through evaporation than they
receive from annual precipitation.
Dry soil becomes sensitive to erosion processes
which carries sand and shapes rocks, creating a
beautiful but unwelcoming landscapes.
Types of deserts
Sahara of Northern Africa, Kalhari of Southern
Africa, and the Great Australian Desert.
Gobi, Takla Makan
Deserts east of the Sierra Nevada Mountains, California &
Nevada, East of the Cascades of Oregon and Washington, and
East of the Andes Mountains in South America.
Cold winter deserts
Atacama Desert of coastal Peru, Namib Desert of
coastal South Africa.
Northern Greenland, and ice- free areas of
most of it in
Erosion is the
which soil and
as wind or water
flow, and then
Wadi is the
that refers to
a valley. In
some cases it
can also refer
to a dry
there is a
is a naturally
as its name
Wind plays an important role in deserts. It
moves large amounts of soil around, covering
much of the world's deserts with sand. About
half of the sand fields of hot deserts exist as
A dune is a hill of sand built by either wind or
The shapes and sizes of dunes change
constantly, but they can be grouped into a few
simple categories: linear, star, and barkhan
Linear (longitudinal) dunes
Crescent sand dunes, also called barkhan or
At first glance, it may seem as there is not much
in a desert. The land may seem empty. The quiet
suggests that there are few or no animals. The
weather may not seem friendly to life. But if we
look closer, a desert is made of ecosystems. In
an ecosystem, plants, animals, land, water and
air work together.
Deserts can be filled with life!