Sahara Test

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second largest

Africa is the ________ continent in the world.

very dry

Arid means _____ ____.

irrigation

For thousands of years the Nile River flooded its banks each summer. The silt left behind helped farmers grow their crops. They also used ________ to bring water to crops.

to periods of drought and famine. During famine people often do not have enough to eat.

Less rainfall and overuse of resources have led __ _______ __ _______ ___ ________. _____ ______ ______ _____ ____ _____ ___ ___ ___ ____.

desertification

Many scientists believe that changes in climate and land use are causing _________, a change from productive land to desert.

camels

Most people use ______ instead of trucks for storage and luggage. When they use ______ it is very inexpensive to keep them.

a hundred years

Salt has been mined by people in the Sahara for over _ ________ ____.

lack of

Scarcity means ____ __.

ground, leaves

Some plants tap deep into the ________ to find a source of water. Some plants store moisture in their ______ and humans and animals for hydration.

reservoir

The Aswan High Dam completed in 1970, makes sure the water doesn't flood. It creates a ________, a natural or human made place used for storing water.

3,500,000 square miles

The Sahara is ________ _______ _______.

Libya

The Sahara is located in Algeria, Niger, Egypt, Southern Tunisia, Mauritania, Mali, _______, Sudan, Southern Morocco, Western Sahara, and Chad.

Tuareg

The ______ are sometimes called the blue people. They are nomads and wear blue clothes and mostly live in Western Africa.

salt

The deposits of ____ have been mined by people for for hundreds of years. ____ was very valuable and sometimes traded for gold.

rainy season

There is a ______ _______ each summer, and during the rest of the year it is very dry.

The Sahara

What is the largest desert in the world?

All of the contiguous US

___ __ ___ ____________ __ could fit inside of the Sahara.

Oases

_____ are places in the desert where water rises to the surface from underground water sources.


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