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Study Guide Answers

1.     Fifteen inches of rainfall per year may be considered drought in one region and abundant precipitation in another region. True or false?
     true
2.     Once it begins, the process of desertification __________________ [can/cannot] be easily reversed.
     cannot
3.     Short-sighted resource management ____________________ [can/cannot] have a major impact on the process of desertification.
     can
4.     Desertification processes generally occur along the margins of true deserts. True or false?
     true
5.     Which of the following is not a desert? a. Thar b. Sahara c. Sahel d. Namib
     c. Sahel
6.     The semi-arid regions of the world, where the greatest danger of desertification exists, average how many inches of annual rainfall? a. less than 10 b. 10 to 20 c. 20 to 30 d. less than 5
     b. 10 to 20
7.     Underground water reserves, most of which take many years to fill up, are called: a. savannas b. steppes c. lagoons d. aquifers
     d. Aquifers
8.     In most warm arid and semi-arid regions, rainfall patterns can be described as _________________________ [seasonal/year-round].
     seasonal
9.     As a general rule, dry land soils are ________________ [rich/poor] in nutrients needed for healthy plant growth.
     poor
10.     Extensive grasslands in regions with cool winters are called; a. savannas b. steppes c. aquifers d. Grazerias
     b. Steppes
11.     Many semi-arid plant species have seeds that can remain alive, but dormant, for many years awaiting sufficient moisture to germinate. True or false?
     true
12.     ___________________ ____________________ __________ [native wildlife is/domesticated animals are] best adapted to semi-arid regions.
     native wildlife
13.     Which ecosystem can support more species of wildlife. a savanna or a steppe?
     savanna
14.     The settling down of once nomadic tribes has not seriously affected the desertification process. True or false?
     false
15.     Man-made wells in semi-arid regions can have negative effects on the land around the well. True or false
     true
16.     Who should decide how to balance land-use needs and carrying capacity restrictions?
     discussion
17.     What are some local land-use issues in your area?
     discussion
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.