On a 500 millibar chart, ____ are drawn to represent horizontal changes in altitude which correspond to horizontal changes in pressure
a. contour lines
b. isobars
c. isotherms
d. isotachs
e. isofiles
ANSWER: a
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Which of the following explains why the boiling points of ethers are more similar to those of comparable alkanes than to those of comparable alcohols?
A) Both ether molecules and alkane molecules are nonpolar. B) Hydrogen bonding between ether molecules is weak. C) Although ether molecules are polar they cannot form hydrogen bonds to other ether molecules. D) None of the above is the correct explanation.
What is a craton?
A) The highly deformed, leading edge of a continent where subduction is occurring B) The oldest part of a continent that has not been significantly deformed for 600 million years C) An exotic terrane being accreted to a landmass D) A down-dropped graben bounded by normal faults
Subgeostrophic flow occurs around low-pressure systems
Indicate whether the statement is true or false
Maps of middle latitudes are typically based on what type of projection?
a. planar b. conic c. cylindrical d. Mercator