Most copper ores are ________.
A. pegmatites
B. oxides
C. placer deposits
D. carbonates
E. sulfides
Answer: E
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What prevents satellites such as the space shuttle from falling?
A) gravity B) centripetal force C) centrifugal force D) the absence of air drag E) Nothing, they continually fall all around Earth.
Ice moves ________ in the zone of accumulation and ________ in the zone of wastage
A) downward, upward B) downward, downward C) upward, downward D) upward, upward
Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain most hydrogen atoms?
A) the alkane B) the alkene C) the alkyne D) None, they all contain the same number of hydrogen atoms.
The H1N1 flu virus is common in ________ but rarely transmitted to humans until recently
A) mosquitoes B) waterfowl C) pigs D) birds E) poultry