The dwindling supplies of rare metals such as indium, tantalum, and platinum may be extended if we rigorously ________
A) exploit known deposits more efficiently
B) reduce demands for social and economic justice
C) relax environmental requirements for mining
D) increase demand for the products in which they are used
E) recycle existing supplies
Answer: E
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During the twentieth century, the Earth's atmospheric temperature increased by about ________ degree(s) Celsius
A) .3 B) 1 C) 2 D) 3
The Coriolis force deflects moving objects to the ____ in Northern Hemisphere and to the ____ in the Southern Hemisphere
A) left, left B) right, right C) right, left D) left, right E) none of the above
What part of North America contains the oldest exposed rocks?
A. the Appalachian Mountains B. western North America C. the east coast of Canada and nearby parts of the U.S. D. Alaska and western Canada E. the Canadian Shield
A wagon is being pulled with a constant force while its mass increases. Acceleration of the wagon
A. remains the same. B. increases. C. decreases. D. will be zero.