What is a major difference between the phosphorus cycle and the water, carbon, and nitrogen cycles?

A. The phosphorous cycle is much faster than the others.
B. The phosphorous cycle does not include the atmosphere but the others do.
C. The phosphorous cycle makes use of living organisms but the others do not.
D. The phosphorous cycle is able to create new energy.
E. The phosphorous cycle has not been impacted by human activity.


Answer: B

Environmental & Atmospheric Sciences

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China has considerable rare-earth metal reserves.  Which situation is a problem for the U.S.?

A. They are stockpiling these reserves and reducing exports to meet their own needs. B. Since they are a critical component in a nuclear warhead, this situation could tip the nuclear balance in their favor. C. The mining and processing is causing pollution on a worldwide scale. D. China artificially depressed the price of these metals causing other producers to stop mining.

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Why did multinational corporations establish offices in Johannesburg, then leave, and now have returned?

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Environmental & Atmospheric Sciences

Freezing nuclei are a part of the ________________ process

Fill in the blank(s) with correct word

Environmental & Atmospheric Sciences