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Physical Geography of Northern Africa
Term | Definition |
---|---|
Delta | an area where sand, silt, clay, or gravel is dropped at the mouth of a river |
Silt | small particles of rich soil good for farming |
Wadi | a dry riverbed that fills with water when rare rains fall in a desert |
Erg | a large area of sand |
Nomad | a person who lives by moving from place to place in search of food |
Phosphate | a chemical salt used to make fertilizer |
aquifer | an underground layer of rock through which water flows |