The rock type that is the source of most commercial asbestos is ____
A)serpentine
B)amphibole
C)pegmatite
D)hematite
E)biotite
A
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Grabens are formed by what type of faulting?
A) collision B) normal C) reverse D) strike-slip
What is "dryland" agriculture?
A) agriculture in dry areas, made possible by irrigation B) agriculture that depends largely on seasonal precipitation to support farming C) agriculture that relies on special, hybridized crops that require almost no water D) agriculture that occurs on oases in land that is otherwise desert E) agriculture that occurs in desert lands, inside a greenhouse with a controlled environment
An ocean of ____ has been photographed on the surface of Titan
a. icy, slushy water b. frozen water c. water-smoothed rock d. liquid hydrocarbons e. liquid nitrogen
If you are located at 40°N latitude, on which of the following dates would you be most concerned about sunburn?
A. August 3 B. July 20 C. May 31 D. May 5