Which factor CANNOT be used to determine the depth of a debris flow in a canyon it moved through?
Indicate whether this statement is true or false.
a. bark battered off the upstream sides of trees up to that height
b. sand embedded in bark up to that height
c. rocks lodged in tree branches up to that height
d. the maximum height of sand eroded from the valley sides
e. the highest rocks on natural levees deposited by the flow
ANSWER: d
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Many common sayings about the weather, such as "red sky at morning, sailor take warning; red sky at night, sailor's delight" are rooted in ____
A) careful observations B) forming a hypothesis C) careful experimentation D) posing a question
How is the disposal of MSW different today than it was in the 1960s? Today, MSW is much
A) less likely to be burned. B) less likely to be recycled. C) less likely to be buried in a landfill. D) more likely to be dumped in the oceans.
What is one advantage of dam and reservoir systems?
A. Dams and reservoirs disrupt migration of some fish. B. Dams and reservoirs can displace people behind the dam C. Dams and reservoirs lead to devastating flooding if there is a failure. D. Dams and reservoirs decrease downstream flooding. E. Dams and reservoirs reduce nutrients released downstream.
If you were reading a research study on the impacts of coal-burning power plants on the environment and found out that the research was paid for by a coal mining company, could you trust the results?
a. Yes, science is objective and the outcome does not depend on who funded it. b. Yes, if I was able to look over all of their data. c. No, not unless I could find another paper not funded by a coal company that had the same results. d. No, I could never trust the results if they were paid for by a company making money from generatingthe pollution.