Photochemical smog is worst in urban areas with a climate that is
A. cool, wet, and cloudy.
B. cool, dry, and sunny.
C. warm, dry, and sunny.
D. warm, wet, and cloudy.
E. warm, wet, and sunny.
Answer: C
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Burl and Paul have a total weight of 1300 N. The tensions in the supporting ropes of the scaffold they stand on add to 1700 N. The weight of the scaffold itself must be
A. 600 N. B. 400 N. C. 800 N. D. 500 N.
A student was asked the question, “What are the major components of the Milankovitch cycle?” The student answered, “The important components of the Milankovitch cycle are variations in Earth’s orbit from nearly circular to elliptical, changes in the tilt of Earth’s axis of rotation, and variations in solar output due to sunspots.” How would you rate this answer?
a. ?EXCELLENT: The student completely and correctly answered the question. b. ?VERY GOOD: The student’s answer was complete, but included an additional component that was incorrect. c. ?GOOD: The student’s answer was incomplete by one component and included a component that was incorrect. d. ?FAIR: The student’s answer was incomplete by two components or included two components that were incorrect. e. ?POOR: The student’s answer was incomplete by more than two components or included more than two incorrect components.
The Theory of Seafloor Spreading integrates the plate tectonics and continental drift.
a. true b. false
Two problems associated with ____________________ are salination and waterlogging.
Fill in the blank(s) with the appropriate word(s).