Losing to the desert: Drought and Desertification Chapter 17.
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Transcript of Losing to the desert: Drought and Desertification Chapter 17.
Key words to understand:Term Meaning
Desertification
Drought
Sahara
Sahel
Population growth
Overgrazed
Over-cultivated
Famines
Migrate
Irrigation
Drought-resistant
Key words to LEARN:Term Meaning
Desertification The process by which land turns into desert
Drought Long rainless periods of time
Sahara The largest desert in Africa
Sahel An area of land across Africa just south of the Sahara desert
Population growth The number of people in an area increasing due to high birth rates and improved health care.
Overgrazed When animals eat grass too quickly for the land to recover.
Over-cultivated The growing and sowing of crops too quickly to allow the land to recover.
Famines When crops fail, people starve and many die
Migrate When people move from one place to another
Irrigation The artificial watering of land
Drought-resistant Crops that can survive long periods of time without water