Which of the following statements is not true?
A. An oxygen sag curve describes changes in a stream's dissolved oxygen content along its length below an organic-matter source.
B. A body of water is described as "dead" when it contains fatal concentrations of toxic chemicals.
C. Chemical treatment of sediment can be effective in reducing pollution problems, but it must be repeated every few years.
D. Fast-flowing streams are generally better aerated than are lakes.
Answer: B
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Rain shadows
A. are areas of particularly high precipitation and generally do not occur near mountains. B. are areas of particularly high precipitation. C. are areas known for receiving little precipitation. D. generally do not occur near mountains.
Scattering by clouds is sometimes called:
A) Rayleigh. B) Mie. C) convection. D) non-selective.
The ________ collectively make up the lithosphere.
A. crust and the whole mantle B. crust and the uppermost part of the mantle C. asthenosphere and the upper mantle D. crust and the asthenosphere E. upper and the lower mantle
One would expect a cP air mass to be
a. ?cold and dry. b. ?cold and moist. c. ?warm and dry. d. ?warm and moist. e. ?temperate and dry.