Which of the following is true of the transuranium elements?

A) Some are stable and some are unstable.
B) They are all stable.
C) They are all unstable, but all have long half-lives.
D) They are all unstable and most have short half-lives.


D

Environmental & Atmospheric Sciences

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A form of symbiosis that benefits one species of the interaction while having no effect on the other species is known as

A. commensalism. B. parasitism. C. mutualism. D. predation.

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The total productivity of upwelling areas is greater than the total productivity of open-ocean areas.

Answer the following statement true (T) or false (F)

Environmental & Atmospheric Sciences

Which of the following is evidence that Earth's history is not short?

A. rates of seafloor spreading compared to the width of the Atlantic Ocean B. thousands of isotopic ages measured by different methods C. millions of layers of light- and dark-colored sediment that record yearly cycles D. a 4-billion-year age on a rock in Canada E. All of these choices are correct.

Environmental & Atmospheric Sciences

Manganese nodules do not accumulate below 4500 meters depth because the manganese minerals are highly soluble in seawater below that depth

Indicate whether the statement is true or false

Environmental & Atmospheric Sciences