The ore-forming process of ________ occurs as early-forming minerals settle to the bottom of a cooling magma.
A. mica and quartz
B. hydrothermal solution
C. gravity deposition
D. residue formation
E. crystal settling
Answer: E
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Iron atoms have a greater tendency to oxidize than do copper atoms. Is this good news or bad news for a home in which much of the plumbing consists of iron and copper pipes connected together? Explain.
A. This is not a problem since any electrons lost will be replaced by copper electrons. B. This is not a problem, since the strength of the copper will make up for the weakness of the iron. C. It is bad news. The iron atoms will lose electrons to the copper atoms, which will pass those electrons onto oxygen atoms that are in contact with the surface. D. This is bad news, since the iron atoms will be reduced by the copper atoms.
China, Australia and Brazil are some of the countries with the highest use of family planning
Indicate whether the statement is true or false.
Hundreds of millions of years ago, in the formation of fossil fuels, large amounts of
A) organic detritus were trapped underground. B) nitrogen were trapped in rocks during extensive volcanic activity. C) sodium were used to form ancient fossils, seashells, and limestone. D) phosphate gas were added to the atmosphere through erosion and evaporation.
A flood recurrence interval of 100 years means that floods of that size will occur only once every 100 years
Indicate whether the statement is true or false