1.Which of these is a major difference between the Sahara and the Sahel?
A. The Sahara has larger forests. B. The Sahel receives more rainfall.
C. The Sahara has more cropland. D. The Sahel records higher temperatures.
2. Marginal land is best described as land that is
A. watered by an oasis. B. on the edge of a town.
C. not well suited for farming. D. best used for raising cash crops.
3. What do ergs, regs, and hammadas have in common?
A. They are all desert flora. B They are all desert fauna.
C. They are all desert landforms. D. They are all desert ecosystems.
4. Which is true about oases?
A. Oases are not found in deserts. B. Oases are created in many ways.
C. Oases are created only by humans. D. Oases are not fed by natural springs
5. What is the main reason pastoral nomads move from place to place?
A. to sell their trade goods B. to care for their date palms
C. to clear new land for their crops D. to find fresh pasture for their herds
6. Read the description of date palm groves below. Then choose the statement that best explains why these trees are so important to life in the Sahara.
Those magnificent palm groves are the blood and bone of the desert; life in the Sahara would be unthinkable without them.
A. Date palms provide shelter for nomads and their herds.
B. Date palms provide food, fuel, and materials for homes.
C. Date palms provide drinking water for people and animals.
D. Date palms provide a cash crop for farmers on marginal lands.
7. All of the following are major causes of desertification except
A. overgrazing. B. deforestation.
C. long-term drought. D. shifting agriculture.
8. Which of the following are most threatened by desertification?
A. croplands B. forested areas
C. marginal lands D. wilderness areas
