A mirage is caused by ____
a. scattering of light by air molecules
b. the bending of light by air of different densities
c. a thin layer of moist air near the ground
d. reflection of light from a hot surface
e. refraction of light through ice crystals
ANSWER: b
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What was the primary reason that other scientists did not accept the continental drift hypothesis?
A. Wegener did not have enough evidence. B. They didn't know about the hypothesis because Wegener was too poor to publish. C. Evidence for the alternative hypothesis of land bridges was much stronger. D. Wegener's explanation for the driving mechanism was weak.
The effect of forces on a mass's acceleration is described by ________
Fill in the blank(s) with the appropriate word(s).
An anthropogenic landscape is a landscape that has been heavily transformed by seismic forces
Indicate whether the statement is true or false
Recent research suggests that ________ is now the key limiting factor in phytoplankton growth in the Gulf of Mexico
A) nitrogen B) sunlight C) oil pollution D) phosphorus E) temperature