Transcript File - Mr. Weiand`s social studies

Chapter 20 Review
Sahara & Sahel
Quiz TOMORROW
Where do most people in the
Sahara live?
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Mountain highlands
Near a desert oasis
Along the riverbanks
In large cities
Which of the following statements
about the Sahara is true?
• The region had a much wetter climate
thousands of years ago.
• Over time, the desert is slowly expanding.
• Trade winds remove moisture from the
ground, keeping the region dry.
• ALL of the above.
What does the old saying “Nighttime is
the winter of the desert” mean?
• Temperatures at night drop below
freezing.
• There are 3 months of bitter cold weather
a year.
• The sun doesn’t rise for weeks in the
winter.
• Plants stop blooming and go dormant at
night.
How are oases formed?
• Springs bubble up to the surface from
streams beneath the ground.
• In low spots, the land dips down to meet
an underground stream.
• People create wells by using digging
machines or digging by hand.
• ALL of the above.
How does the system known as shifting
agriculture help marginal lands?
• It gives worn-out fields a chance to
recover.
• It brings water to dry farmlands.
• It allows livestock to destroy the cover of
plants.
• It creates new topsoil.
Along the southern edge of the major
desert in Africa is a semiarid grassland
called…
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The Great Plains
The Sahara
The Sahel
The Southern Oasis
Pastoral nomads have adapted
to life in the Sahel by…
• Building their communities near desert
oases.
• Growing plants that need little rainfall.
• Wandering in search of food and water for
their animals.
• Moving to cities in search of work.
How have desert plants adapted
to unpredictable rainfall?
• They sprout quickly after rain and then set
seed and die.
• They send roots deep into the ground to
find water.
• They have small waxy leaves that lose
little moisture.
• ALL of the above.
The most important and most
common oasis plant is…
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Pine tree
Coconut
Date palm
Baobab tree
What is one way humans have
contributed to desertification?
• Too many people have chosen to cook
with coal instead of firewood.
• Nomads increased the size of their herds.
• People planted too many trees in a desert.
• Farmers planted cash crops that ruined
the soil faster.
The rivers that flow through the
Sahara are
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Nile and Niger
Ganges and Godavari
Amazon and Orinoco
Volga and Dnieper
How do the people protect
themselves from the sun?
• They carry umbrellas to protect their faces.
• They cover their skin with a plant-based
sunblock.
• They wear long, loose clothing and cover
their heads and faces.
• They are nocturnal and never go outside
during the day.
Why are most oasis settlements
small?
• Laws restrict the growth of these
communities.
• Their size is limited by their water supply.
• Families are not allowed to have more
than one child.
• The majority of the people prefer to live in
the desert.
As the world’s largest desert, the
Sahara is about the same size as…
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United States
Africa
Rhode Island
France
Ergs, regs, and hamadas are
• The native people of the Sahara.
• The major food sources for people living in
the Sahara.
• The most common types of plant life in the
Sahara.
• The main types of landforms in the
Sahara.
How have the Tuareg adapted
to life in the Sahara and Sahel?
• They settle along the coastline where
seafood is plentiful.
• They raise animals and live a nomadic
lifestyle.
• They grow a variety of crops at desert
oases.
• They live in cities where jobs are easier to
find.
Drought is to desertification as
hunger is to
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Thirst
Overeating
Starvation
Satisfaction