Discuss the facets of sustainable mineral use
What will be an ideal response?
Minerals are nonrenewable resources and therefore need to be mined and utilized efficiently. Otherwise, some, like indium, copper, gold, and tantalum, which are scarce will rapidly reach the depletion point, past which their extraction and processing will be prohibitively expensive. A cornerstone of sustainable minerals use is recycling. The greater the volume of recycled scarce mineral and more efficient the recycling process, the longer the supplies will last and the longer in which to discover more available, cheaper, and hopefully renewable replacements. Practical goals are those already attained for gold, where more metal is recycled than consumed, and lead, where 80% of U.S. lead consumed comes from recycled postconsumer items. Finally, new deposits need to be sought, and more efficient extraction technologies need to be developed.
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Which of the following describes the month and season in the Southern Hemisphere when it is January and winter in the Northern Hemisphere?
A. It is January and winter. B. It is July and summer. C. It is July and winter. D. It is January and summer.
Will density increase or decrease with the crystallization of a magma?
A) Decrease B) Increase
Mass movements classified as slow, move at a rate of ________.
A. 1.5 m/year (5 ft/year) B. 0.3 m/5 years (1 ft/5 years) C. 0.3 m/sec (10 ft/sec) D. 1.5 m/day (5 ft/day)
Use the Three Gorges Dam on China's Yangtze River to illustrate the benefits and costs associated with building dams
What will be an ideal response?