Auroras are seen
a. ?in the Northern Hemisphere only.
b. in the Southern Hemisphere only.
c. ?in both the Northern and Southern Hemispheres at high latitudes.
d. ?in both the Northern and Southern Hemispheres near the equator.
e. ?everywhere on Earth
ANSWER: c
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If a gas cools under constant pressure, the molecules within it have ________ kinetic energy (motions) and can therefore ________.
A) less; be packed into a smaller volume B) less; be packed into a larger volume C) more; be packed into a larger volume D) more; be packed into a smaller volume
In this part of the Periodic Table, what type of elements are in the group that includes elements C, O, and S?
A. noble gases B. nonmetals C. metals D. silicates
The weathering of limestone can create circular depressions known as
A) uvalas. B) stalactites. C) sinkholes. D) caverns.