Chapter 20 quiz answers
A decades-long conflict between south and north ________ killed about 300,000 people. a Sudan b Senegal c Niger d Chad
a
An example of successful water management being practiced in the Transition Zone is a using drip irrigation for farming. b collecting rainwater in basins. c recycling waste water. d restricting water use to alternate days.
a
In subsistence farming, a farmer a grows crops primarily to feed his or her family, selling any small surplus. b plants fast-growing crops to take advantage of short growing seasons. c rotates crops every season to maintain soil fertility and prevent diseases. d receives compensation from the government to plant specific crops. Time left for this assessment: 15:30 Next Page
a
The average annual rainfall in the Sahel is a 4 to 8 inches. b 14 to 18 inches. c 8 to 12 inches. d 10 to 14 inches.
a
The vegetation of the Sahel is a low-growing grasses, shrubs, and acacia and baobab trees. b low-growing grasses, cacti, and drought-resistant shrubs. c shrubs interspersed with evergreen forests. d rainforests, prairie grasses, and cacti. Time left for this assessment: 18:37
a
a trading empire in Ethiopia from about AD 100 to AD 77
axum
The Great Green Wall is a plan to create a a "green" Sahara by planting trees and grasses in it. b a barrier of trees to stop the spread of the Sahara. c a belt of fertile land that can be used for agricultural purposes. d a "green" Transition Zone by using better crop varieties and irrigation processes. Time left for this assessment: 17:04
b
Most people in the Transition Zone live in a nuclear families headed by a female family member. b extended families headed by a female family member. c extended families headed by a male family member. d nuclear families headed by a male family member.
c
The Arabic word Sahel means a vast. b desert. c shore. d border.
c
The International Atomic Energy Association is working with thirteen countries in the subregion to a bring atomic energy to the subregion. b create atomic testing zones in arid areas. c promote understanding of the subregion's aquifers. d harness water power to create hydroelectricity.
c
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chapter 20 answers
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chapter 21 answers
Desertification is a easy to manage and reverse. b caused primarily by climate change. c the natural expansion of the Sahara. d caused by both human activities and variations in climate.
d
Lake Chad is being polluted by a ore mines. b electronic manufacturers. c tourists and livestock waste. d cotton and rice farmers.
d
The Sahel is a ________ of vegetation that stretches 3,700 miles (6,000 km) from the Atlantic Oceanto the Indian Ocean. a triangular zone b broken line c circular area d narrow band
d
The population of the Transition Zone a has declined significantly in recent decades. b has remained steady for the past 30 years. c is relatively small. d is rapidly growing.
d
Which statement about post-colonial Africa is true? a Ethnic groups adopted the cultures and traditions of the majority population in their countries. b Most countries reshaped their boundaries to reflect cultural, religious, and traditional boundaries. c People migrated to countries with large populations of their ethnic group. d Most countries kept the boundaries created by colonial rulers.
d
Why do residents of the Sahel welcome the harmattan? a It is a cool, dry wind that decreases temperatures in the summer. b It is a cool, moist wind that signals the start of the rainy season. c It is a warm, moist wind that brings mild precipitation to coastal areas. d It is a hot, dry wind that rids the air of its humidity.
d
Humanitarian aid that poured into the region following the drought of the mid-20th century resulted in beneficial water management practices. True False
false
Most international agencies believe there is little that can be done to reduce the effects of desertification in the Transition Zone. True False
false
The region's most successful projects to combat the effects of desertification have been those led by international groups such as the United Nations Convention to Combat Desertification. True False
false
an African empire that controlled Egyptian territory from about 2000 BC to about 1500 BC in what is now Sudan
kush
a trading empire in the western part of the Transition Zone that flourished and spread Islam from the 13-16th century
mali
the ruler of an empire in the Transition Zone who gained fame for his pilgrimage to Makkah
mansa musa
a trading empire in the western part of the Transition Zone during the 15th century that was overtaken
songhai
Better water management will help to increase food security and reduce poverty. True False
true
Changes in demand and climate have decreased the availability of water in the Lake Chad Basin. True False
true
