What was the driving mechanism proposed by Hess to explain sea floor spreading?
a. downwelling oceanic currents
b. hydrothermal cells
c. thermal convection cells
d. motions in the outer core
e. thermal convection cells AND motions in the outer core
c. thermal convection cells
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Which of the following is an example of an open access system?
A. Native American management of wild rice beds and hunting grounds. B. Cattle grazing on common woodlands and pastures in colonial New England. C. Maine lobster fisheries. D. Nearshore fisheries in many parts of the world. E. None of these are examples of an open access system.
Discuss how cleaning an oil spill can be more harmful than the oil itself. What will be an ideal response?
Improving ____ means using less energy to provide the same amount of work.
A. energy quality B. proven reserves C. energy resourcefulness D. energy efficiency E. tariffs
Which of the following fast-swimming fish has the lowest body temperature?
A) Bluefin tuna (Thynnus) B) Bonito (Sarda) C) Mackerel (Scomber) D) Moonfish Opah (Lampris guttatus) E) Yellowtail (Seriola)