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Study Guide Answers

1.     A dense forest that is difficult to penetrate is called a(n) ____________________________________ .
     closed forest
2.     Did early Man have a major effect upon the forested regions of the world?
     No. Early Man was part of nature.
3.     What did Man learn to do between 10,000 and 20,000 years ago, that has impacted the world's forests?
     People learned to cultivate wild plants for food, and they learned to use fire to remove trees from the land.
4.     What do we call the technique whereby forested lands are burned for farming?
     slash-and-burn
5.     It is believed that the cultivation of wheat and barley began in what ancient region?
     Mesopotamia
6.     What were some effects of the development of agriculture?
     increased human population, the shaping of the land, the formation of towns
7.     How were open areas damaged? What was the result of this damage?
     The grazing of animals damaged open areas. This resulted in the massive erosion of topsoil.
8.     Deforestation had filled the rivers and irrigation canals of Babylonia with silt by what year?
     3,000 B.C.
9.     Environmental destruction may have been a factor that contributed to the downfall of what great empires?
     Babylonia and Rome
10.     Have deserts been caused by human activity?
     yes
11.     What is the process of desert formation called?
     desertification
12.     At one time,__________% of France was forested. By 1789, this percentage was reduced to a mere ______________%.
     80, 14
13.     What was not available in England for shipbuilders?
     tall, straight timbers for masts
14.     When the first Europeans came to America, a(n) __________________________ forest extended inland, unbroken for _________________ miles.
     hardwood/ 1,000
15.     Many modern forests in the United States are essentially ___________ ______________ .
     tree farms
16.     Since ancient times, _______-_____________ of the world's forests have been destroyed.
     one-third
17.     "Coniferous" means "________________________________________ ."
     cone-bearing
18.     Tropical forests cover about _____________% of the world's land surface.
     6
19.     It is estimated that up to __________% of the world's species live in tropical forests.
     90
20.     Between 1850 and 1980, Africa lost ________% of its trees.
     80
21.     Industrialized countries, with ________-_______ of the world's population, use ________% of the world's resources.
     one-fourth/ 90
22.     What is the "Third World"?
     the developing nations
23.     How many people are using wood for fuel, faster than trees can be grown to replace it?
     one and a half billion people
24.     How long does it take for topsoil to build in a region?
     thousands of years
25.     In Africa, for every tree planted, how many are cut down?
     29
26.     Near New Delhi, India, forest loss is at ____________%.
     60
27.     Costa Rica was once _________% rain forest. Today, it is __________% rain forest.
     98/ 16
28.     What would sustainable forestry ensure?
     It would ensure that new trees would replace those cut down.
29.     In Costa Rica, ______________________________ are grown for export to industrialized nations.
     cash crops
30.     Are jungle lands fertile, once they are cleared for farming?
     No -they tend to be useless within three years.
31.     The United States consumes about ______-____________ of the meat produced in the world.
     three-fourths
32.     What do trees produce that all animals need in order to survive?
     oxygen
33.     The Amazon jungle will be gone in about _________ years, given the current rate of destruction.
     30
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.