Which one of the following best describes a flux?
A) Movement of elements or compounds between reservoirs in a biogeochemical cycle
B) A type of flower used for food and fiber; also known as linseed
C) Variation in output from a large water reservoir, such as output through a hydroelectric dam
D) A pool or reservoir where an element or compound is stored within a biogeochemical cycle
A
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An example of a primary effect of drought is
A) rolling blackouts. B) drop in groundwater levels. C) decrease in tourism. D) low dissolved oxygen content in reservoirs.
Which of the following is data (meaning actual observation) rather than an interpretation?
a) recent volcanism at Yellowstone is related to the process that caused the low topography b) there is an area of low topography southwest of Yellowstone National Park c) volcanism in Yellowstone overlies an area of hotter-than-average mantle d) the low topography southwest of Yellowstone formed when North America moved over a hot spot e) All of the above are actual observations
Researchers have suggested four principles for carrying out most forms of ecological restoration and rehabilitation. Which one of the following is not one of these principles?
A. Find the cause of the degradation. B. Stop the abuse by eliminating the causes. C. Encourage the development of economic zones in the ecosystem. D. Reintroduce species, especially keystone, foundation, and pioneer species. E. Protect the area from further degradation.
The energy received in just 35 minutes at the surface of the United States exceeds the amount of energy derived from the burning of fossil fuels in a year
Indicate whether the statement is true or false