Reliance on the continued use of fossil fuels is not sustainable because fossil fuels are
A) concentrated in countries that are not politically stable.
B) not significant sources of energy and are increasing in cost.
C) not renewable and contribute to global climate change.
D) not renewable and are primarily from politically unstable regions.
C
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What statement is true of the surface area of oceanic ridges and their associated features?
A) They consist of slightly less area than that of all the land above sea level. B) They consist of more area than that of all land above sea level. C) These are almost always located in the mid-ocean. D) These areas are largely covered by sediments.
A decrease in stream discharge will most likely result in an increase in:
a. drainage area. b. stream competence. c. stream capacity. d. stream energy. e. stream deposition.
The maximum sustainable yield (MSY) is best defined as ________
A) annual harvest that will balance natural mortality and predation B) largest catch that can be taken without overfishing C) largest catch that will cover the minimum cost of fishing D) maximum fishing effort allowed after overfishing occurs E) minimum catch that will still allow the population to increase
Approximately what percentage of water on Earth is contained within the oceans?
A. 31% B. 52% C. 97% D. 85% E. 12%