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DESERT ENVIRONMENTS
Deserts are located
between 15°and 30°
of Latitude in the
northern and
southern
Hemisphere!
This is a zone of sinking
air, which creates high
pressure and means their
are no clouds, which
means these places are
very dry.…read more

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WHY ARE DESERTS HOT?
Its to do with the proximity to
the equator. The sun rays at
the equator are more
concentrated, and only has to
heat a small area.
HOT
STUFF!
Due to the curve of the earth
the other sun ray has to cover a
larger surface are, and has to
travel further, which means it
is weaker and collects dust,
therefore not as strong on
arrival.…read more

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VARIATIONS IN CLIMATE!
The diurnal range of
temperature is much
greater that the annual Due to sinking air, there
one! are no clouds in the
desert. Clouds can
reflect up to 80% of
sunlight! Without clouds
it gets VERY HOT in the
desert!
At night however clouds
trap heat... So without This results in a
them all the heat escapes large diurnal
into the atmosphere! This range.
can even cause frost in
deserts!…read more

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FLASH FLOODING
Large black cumulonimbus
Flash flooding clouds are formed, it rains often
occurs due to being a thunderstorm
convectional
rain.
The air is heated by
the ground. It rises,
cools and condenses
The desert has been
baked hard by the sun,
The ground raindrops can not
gets very hot infiltrate the
impermeable surface,
causing flooding.…read more

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ADAPTATIONS OF A CACTUS
To survive the desert a cactus has to
have many adaptations.
Cactus have spines these:
-deter predators
-Break up the wind
-ensures the cactus has a layer of still air to
keep warm
-Ensures a small surface area ( reduces
water loss)
The cactus is green so
it can photosynthesise
because it has no
leaves.
The cactus body is
pleated so that it
can swell up to Desert pants have two kinds of root:
take in rainwater -shallow roots (takes in surface rain water)
-Deep Roots ( reach any underground water store)…read more

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Comments

Mr A Gibson

A nicely put together presentation which takes you through various key facts and examples relating to deserts. Good work!

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