What is a gyre?
a. A type of vertical circulation
b. A circular flow of water around the periphery of an ocean basin
c. A type of thermohaline current
d. A type of current along the western margins of ocean basins
ANS: B
Continents and basins topography makes the continuous flow of water impossible. These features
deflect moving water in circular patterns. The flow around the edges of an ocean basin is a gyre.
Information can be found in the section Surface Currents Are Driven by the Winds.
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As energy flows in ecosystems, it can be said to
a. cycle, as in a round trip b. flow from high-quality to low-quality energy in a one-way fashion c. either flow one way or cycle, depending on the type of energy involved d. flow in a two-directional fashion e. energy does not flow or cycle
Which statement about urbanization is correct?
A. Most of the population in more-developed countries already lives in urban areas. B. The greatest increases in urban growth are taking place in more-developed countries. C. The number of megacities has been decreasing since the year 2000. D. The general trend is that people are leaving urban areas and moving back to rural areas.
Heat transfer from the equatorial regions to the poles ceased during the ____
A)Paleogene B)Paleocene-Eocene Thermal Maximum C)Paleogene Thermal Maximum D)Holocene glaciation E)Pleistocene glaciation
As plastics discarded in the marine environment degrade, they can produce and concentrate
A. DDT B. bisphenol A (BPA) C. PCBs D. All of these choices are correct.