Share Ch. 20 Vocab Sahara and Sahel
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what is an adaptation?
a change in a way of life to suit new conditions
what does it mean to be arid
dry or lacking rainfall; also a climate or climate zone that is hot and dry all year with very little rain
what is a cash crop?
a crop that is grown to be sold rather than to be consumed by the farmers and their families
what is deforestation?
removing or clearing away the trees from a forest. __________is often done to clear land for farming or ranching.
what is a desert?
a geographic region with too little rainfall to support much plant life; also a vegetation zone
what is desertification?
the process by which land becomes more and more dry until it turns into desert. This may be caused by climate change, human activities, or both.
what is a drought?
an unusually long period in which little or no rain falls
what are economic activities?
any action that relates to the making, buying, and selling of goods and services
What is an erg?
a great sea of sand with tall sand dunes in the Sahara
What is erosion?
the gradual wearing away of Earth’s surface by the action of wind, water, ice, and gravity
What is a hammada?
a high, rock-covered flatland in the Sahara
What is a landscape?
a large area with a particular kind of scenery, such as a desert landscape
what is marginal land?
land that is not well suited for growing crops
what is an oasis?
an isolated spot in a desert where water is found
who are pastoral nomads?
groups of herders who move with their animals from place to place in search of pasture and water
what is precipitation?
moisture that falls from the sky as rain, snow, sleet, or hail
