The World Trade Organization was created in:

A) 1990.
B) 1995.
C) 1996.
D) 1998.
E) 1999.


Answer: B) 1995.

Environmental & Atmospheric Sciences

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Alkaloid salts are not very soluble in the organic solvent diethyl ether. What might happen to the free-base form of caffeine dissolved in diethyl ether if gaseous hydrogen chloride, HCl, were bubbled into the solution?

A. A second layer of water would form. B. Nothing, and the HCl gas would merely bubble out of solution. C. The acid/base reaction would release heat, which would cause the diethyl ether to start evaporating. D. The diethyl ether insoluble caffeine salt would form as a white precipitate.

Environmental & Atmospheric Sciences

Ullman's model of spatial interaction emphasizes three essential conditions. Which of the following is not one of them?

A. complementarity B. intervening opportunities C. gravity D. transferability

Environmental & Atmospheric Sciences

When an iron-bearing mineral is heated above a certain temperature, it loses its magnetism. This temperature is about ____________

a) 110°C b) 220°C c) 340°C d) 580°C e) 1200°C

Environmental & Atmospheric Sciences

____________ constituents are those substances dissolved in seawater that are tied to the biological, seasonal, or very

short geological cycles. Fill in the blank(s) with the appropriate word(s).

Environmental & Atmospheric Sciences