Half the world's silver in the 16th century was produced in mines at Potosi, now located in what country?
A) Chile
B) Argentina
C) Uruguay
D) Colombia
E) none of the above
Answer: E
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The proportions of dissolved gases in the ocean are very different from the proportions of the same gases in the
atmosphere because of differences in their ____________ in water and air. Fill in the blank(s) with the appropriate word(s).
The bioaccumulation of DDT threatened several species of fish eating birds by
A. making them dizzy and unable to fly. B. making them lose their feathers. C. making them lose their urge to hunt. D. making their egg shells too strong for hatching young birds to break free from. E. causing them to lay eggs with shells too fragile to reproduce successfully.
Which of the following best matches the description?Substances that endanger life if encountered.
A. RCRA B. National Priority List C. LD50 D. waste minimization E. Superfund F. CERCLA G. reactivity H. acute toxicity I. ignitability J. threshold levels K. hazardous wastes L. chronic toxicity M. synergism N. corrosiveness O. toxicity
With the Sun and Moon in this position, the side of the Earth facing the Moon experiences
A) a normal high tide.
B) a normal low tide.
C) a spring tide.
D) a neap tide.