What is the correct name for MgO?
A) monomagnesium monoxide
B) magnesium monoxide
C) magnesium oxide
D) magnesium oxygen
C
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What is the primary pollutant that makes up the Great Pacific Garbage Patch?
A. plastics B. oil C. abandoned ships D. dead whales
What percentage of the American and Canadian populations are employed in the tertiary and quaternary sectors?
A) 5% B) 50% C) 35% D) 20% E) more than 70%
Which of the following is not true?
a) the magnetic poles have reversed periodically in earth history b) magnetism is imparted to igneous rocks at the time of their formation c) virtually all rock types preserve some paleomagnetic signal d) magnetic field reversals occur about every 500,000 years e) there have been long periods of no magnetic field
An example of chemical weathering is
A. exfoliation. B. the breakdown of rocks by freezing and thawing. C. the wearing away of a stream bank by a river. D. karst topography.