The most important mineral product of northern Chile is
A. sand
B. gold
C. copper
D. oil
C. copper
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A sample contains 60 % Plagioclase Feldspar and a medium amount of silica. What would you call it?
A) an intermediate igneous rock B) a mafic igneous rock C) an ultramafic igneous rock D) a felsic igneous rock
Which of the following processes is primarily responsible for the sky's blue color?
A. reflection B. filtering C. absorption D. scattering
Braided streams are characterized by
A) sediment deposition in the channel resulting in the formation of sand and gravel bars and numerous small "channels." B) severe erosion of the channel bed. C) a heavy load in relation to its discharge D) all of the above E) A and c
A person experiencing dizziness immediately after inhaling fumes from a strong household cleaner is exhibiting a(n)
A. chronic effect. B. subchronic effect. C. acute effect. D. subacute effect. E. superacute effect.