Sahara Test
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.
