Convection currents in the air near a seashore are produced by
A. unequal heating of land and water.
B. varying temperatures.
C. shifting winds.
D. none of the above
Answer: A
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Which equal volume of material expands more when the temperature is lowered?
A. Water at 4°C. B. Helium. C. Iron. D. Wood.
Describe and discuss the marine communities of the Ordovician, Silurian, and Devonian. How
do they compare with present-day marine communities? What will be an ideal response?
Net convergence of air would cause surface pressure to ____ and net divergence would cause surface pressure to ____
a. increase; decrease b. increase; increase c. decrease; decrease d. decrease; increase e. remain the same; remain the same
Should government spend billions of dollars developing new, cleaner ways to burn coal?
a. Yes, it is worthwhile. Coal is an abundant resource that can help meet our nation’s energy demands. b. Yes, but money should also be spent developing renewable energy resources. c. No. We should discontinue burning coal immediately. d. No. I believe that coal companies should finance cleaner technology, not the government.