One of the most important characteristics of a pesticide is how long it will remain deadly in the environment, a characteristic called ____.
A. lethal dose
B. history
C. usefulness
D. impact
E. persistence
Answer: E
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During the Great Depression, conservation
A) was simply a luxury that could not be afforded. B) efforts were opposed by millions of people who had no time to go to parks. C) provided work and helped restore land. D) was devalued as most national parks and national forests were harvested for timber and coal.
When contrasting a scientific hypothesis from a scientific theory,
a. a theory requires that predictions be made before it can be tested, supported, and ultimately become a hypothesis. b. a scientific theory must first be established before the hypothesis can be tested. c. a hypothesis is a yet untested explanation for a phenomenon, whereas a theory is a repeatedly-tested and widely accepted explanation for a phenomenon. d. a hypothesis is a repeatedly-tested and widely accepted explanation for a phenomenon, whereas a theory is a yet untested explanation for a phenomenon. e. a hypothesis must first be established before the theory can be tested.
Which of the following will need to strike some balance between economic output and environmental quality as a prominent climate change priority?
A. countries with high-incomes B. every country C. market-oriented countries D. command-oriented countries
What is true about tropical cyclones?
A. They are much larger than midlatitude cyclones. B. They can move into the midlatitudes. C. They are associated with high-pressure centers. D. They develop from two unlike air masses. E. They are categorized by their barometric readings.