Environmental problems associated with large hydroelectric dams include
A. loss of fertile farmland, destruction of aquatic communities, and relocation of people.
B. global warming, ozone destruction, and private land rights.
C. air and water pollution and higher crime.
D. warming of water, reduced evaporation, and reduced recreational opportunities.
Answer: A
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Indicate whether the statement is true or false
All European countries adopted the euro EXCEPT
A) Britain. B) Denmark. C) Sweden. D) all of the above E) none of the above
Mixtures can be separated into their components by taking advantage of differences in the chemical properties of the components. Why might this separation method be less convenient than taking advantage of differences in the physical properties of the components?
A. Chemical properties are not as apparent as are physical properties. B. The chemical properties of the components of a mixture are too similar to each other. C. A chemical property involves a chemical change so that you no longer have what you had. D. The chemical properties of the components of a mixture are too different from each other.
Which is an example of a stage in secondary succession?
A. bare rock produced from a volcano B. a forest regenerating after a forest fire C. pure sand D. a new lake produced by damming a river