Which of the following statements about U.S. land-use policy is true?
A. Under current law, all federal lands are protected from development.
B. Each area is assigned one land use deemed best for that area.
C. Federal policies are of little importance overall because the area covered by national parks is relatively small.
D. The emphasis was on resource exploitation until the mid-twentieth century.
Answer: D
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Pesticides kill only which of the following organisms?
A. Pesticides generally kill more than one type of organism B. Humans working around crops C. Fish in agricultural streams D. Pests of important cash crops
Salt wedging is of slight consequence in ________
A) regions above the treeline B) humid regions C) marshes D) arid regions E) volcanic regions
Explain why coastal areas tend to have higher winds than either the land or water regions nearby
What will be an ideal response?
Obsidian is an igneous rock with a glassy appearance and minimal crystal growth. What accounts for this?
A) Obsidian is an extrusive igneous rock that cooled rapidly on Earth surface, resulting in little crystal growth. B) Obsidian is an extrusive igneous rock that cooled very slowly on Earth surface, resulting in little crystal growth. C) Obsidian is an intrusive igneous rock that cooled slowly beneath Earth's surface, resulting in little crystal growth. D) Obsidian is an intrusive igneous rock that cooled rapidly beneath Earth's surface, resulting in little crystal growth.