Specific gravity is the ratio of a mineral's weight to the weight of an equal volume of water at four degrees Celsius
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True
Environmental & Atmospheric Sciences
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When excess nitrogen from industrialized agricultural fields enters rivers as runoff, which of the following happens first?
A. It promotes the growth of algae. B. It is consumed by bacteria. C. The nitrogen directly depletes the oxygen. D. The nitrogen poisons the fish.
Environmental & Atmospheric Sciences
An ecosystem's nutrient cycle cannot be described
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Environmental & Atmospheric Sciences
HIV, the retrovirus which causes AIDS, does which of the following?
A) uses reverse transcriptase to synthesize DNA B) uses RNA replicase replicate it own RNA C) both a and b D) neither a nor b
Environmental & Atmospheric Sciences
Quartz weathers readily to aluminum-rich clay minerals
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Environmental & Atmospheric Sciences