Which of the following would be a common diameter for a tornado?
A) 40 meters
B) 400 meters
C) 4,000 meters
D) 40,000 meters
E) 400,000 meters
Answer: B
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Natural gas consists of which gases?
A. methane, propane, and butane B. ethanol, ethane, and butane C. propane, oxygen, and methane D. butane, carbon dioxide, and sulfide E. sulfide, oxygen, and ethanol
What is the approximate residence time of water vapor in the lower atmosphere?
a. 1 hour b. 1 day c. 10 days d. 100 days e. 1000 days
Why is the sofar layer efficient for sound travel?
a. Refraction causes the sound energy to remain within the layer. b. The density of the sofar layer traps the sound energy. c. Sound energy bends away from layers of lower sound velocity. d. Temperatures and salinity conditions are homogeneous.
Of the following statements about seawater salinity, which is/are true?
-An increase in salinity causes a corresponding decrease in electrical conductivity. -The two most common dissolved components in seawater are sodium and chloride. -Seawater salinity averages 35‰. -Seawater salinity averages 3.5%. -Seawater salinity does not vary from place to place in the ocean.