Reserves, by definition, must be all of the following except
A. all rock types that are likely to host as yet undiscovered ore.
B. exploitable with current technology.
C. identified ore deposits.
D. economically profitable to mine at present.
Answer: A
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Life on Earth would most likely be less advanced if there were no magnetic field.
Answer the following statement true (T) or false (F)
Harry Hess suggested which of the following?
A) Guyots formed at deep depths and migrated to shallow water. B) The continents plowed through oceanic lithosphere on their own power. C) The oceans are much older than the continents. D) The volcanic mid-ocean ridges were formed due to sea floor spreading.
The field of urban planning has embraced the concept of "smart growth" to mitigate climate change. Which of the following would not an example of smart growth?
A. adding green space to planned communities B. adding bicycle paths to new, planned communities C. replacing grass with artificial grass made of plastic D. reducing distances between homes, stores, schools, and workplaces in new, planned communities
Which of the following species is undergoing reduction? 2 CuBr ? 2Cu + Br2
A) Cu B) CuBr C) Cu+ D) Br- E) Br2