Denitrification converts nitrates into ________

Fill in the blank(s) with the appropriate word(s).


Answer: free atmospheric oxygen and nitrogen

Environmental & Atmospheric Sciences

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The Himalaya Mountains are the result of an orogeny. Indicate whether the statement is true or false

Environmental & Atmospheric Sciences

A yazoo tributary stream cannot join with the main river in an area because

A) the yazoo flows in a different valley. B) a man-made flow control structure keeps the rivers separate. C) a small structural ridge separates the rivers. D) a natural levee on the main river prevents its joining.

Environmental & Atmospheric Sciences

Why are plants a good source of potential drug compounds?

A. because natural products are much more effective than synthetic products B. because it is far cheaper to grow chemical compounds in a plant than it is to synthesize them in the laboratory C. because there are thousands of different plants with thousands of different chemicals in them D. all of the above E. none of the above

Environmental & Atmospheric Sciences

In the sewage treatment process, the purpose of chlorination involves ____.

A. adding essential nutrients to drinking water B. removing discoloration and killing bacteria C. the reaction of chlorine with organic materials to form chlorinated hydrocarbons D. preserving pipes in the sewage facility E. helping large particles settle

Environmental & Atmospheric Sciences