In principle, silicic (or felsic) magma could mix with an equal amount of mafic (or basaltic) magma to form
a) more silicic or felsic magma
b) more mafic or basaltic magma
c) more silicic or rhyolitic magma
d) Intermediate or andesitic magma
e) more mafic or gabbro type magma
Ans: d) Intermediate or andesitic magma
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Heating ores to release the metals they contain is called ____________________
Fill in the blanks with correct word
Standard provisions of structural adjustment programs include all of the following
a) reduction of education and public services. b) increased subsidies. c) liberalization of trade. d) emphasis on export crops.
Treating malaria with drugs is difficult because
A) no drug has yet been found that effectively treats malaria. B) the malarial parasite has quickly evolved drug resistance. C) it is impossible to distribute drugs to regions affected by malaria. D) the best drugs cost thousands of dollars per person.
Per molecule, methane is 25 times more effective at warming the atmosphere than carbon dioxide.
Answer the following statement true (T) or false (F)