In general, climate boundaries:
A) are difficult to determine.
B) do not shift from year to year.
C) are broad transition zones and not sharp lines.
D) cannot be determined with adequate cloud cover data.
C
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Three trillion dollars — $3,000,000,000,000 — represents
A) the economic cost of the Iraq and Afghanistan Wars. B) the amount spent supporting human and children's rights in the world's periphery. C) the cost to the USA of attaining the number one ranking in the Global Peace Index. D) the amount lost to government corruption around the world every year..
The direction of a gravitational field is
A) in the same direction of gravitational attraction. B) away from the center of gravity of an object. C) opposite to the direction of gravitational attraction.
The subfield of geography and geology concerned with the study of the origins, evolutions, form, and spatial distribution of the Earth's landforms is
A) geophysics. B) lithology. C) geomorphology. D) Pedology.
Which of the following biologically important compounds is chiral?
A) 2-aminopropanoic acid B) 2,3-dihydroxypropanoic acid C) 3,5-dihydroxy-3-methylpentanoic acid D) all of them