Which of the following is a common type of intrusive igneous rock?
a. sandstone
b. basalt
c. shale
d. marble
e. granite
E
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GPD and per capita GDP
A. measure and compare cap-and-trade benefits. B. measure and compare the efficiency of tax shifting. C. measure and compare subsidies provided by more-developed nations. D. measure and compare the economic output of nations. E. generally are not useful for economists.
Smelting of iron ore involves ________
A) dissolving the ore in hot water to separate iron and aluminum B) washing the ore with acid to extract iron C) crushing and heating the ore at its melting point D) heating beyond iron's melting point and combining the material with carbon E) oxidizing iron to ferric oxide and then adding silicon and boron
Why do urbanized societies need stretches of uninhabited and undeveloped land?
What will be an ideal response?
In which of the following areas would one tend to find the highest net primary productivity?
A) Western Canada B) Central Australia C) Northern Brazil D) Eurasia