Most of the fresh water on Earth is found in ____
a. glacial ice
b. lakes
c. the atmosphere
d. rivers
a
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What occurs when waves hit an obstacle straight on?
a. Wave refraction b. Wave diffraction c. Wave dispersion d. Wave reflection
Some of the most problematic MSW in oceans are
A) heavy metals and other toxic elements from coal ash. B) wood, vegetation and paper originating from landfills and commercial shipping. C) food wastes dumped by large tourist liners. D) non-biodegradable plastics that contain toxic materials and circulate in huge gyres.
Emergent vegetation such as cattails and reeds grow in the __ zone of a lake.
a. profundal b. benthic c. littoral d. limnetic
________ sediments are deposited or precipitated as a result of the actions of organisms.
A. Pyroclastic B. Siliciclastic C. Calciclastic D. Hyaloclastic E. Biochemical