All of the following contributed to the severity of London's Great Smog of 1952 EXCEPT:
A) widespread coal burning. B) a passing cyclonic storm.
C) a persistent temperature inversion. D) unusually cold weather.
B
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A location exhibiting the following characteristics would be most prone to drought.
A) Sea breeze, low pressure, cold current becomes warmer. B) Offshore breeze, high pressure, cold current becomes colder. C) Sea breeze, low pressure, cold current becomes colder. D) Offshore breeze, high pressure, warm current becomes warmer.
The youngest event represented in this block diagram is
A) formation of the lowest layer.
B) deposition of the top layer.
C) erosion of a canyon by a river.
D) retreat of the seas.
Conical marine organisms that lived during the Cambrian and were the earliest builders of reeflike
structures:a. protists d. sponges (porifera) b. cyanobacteria e. archaeocyathids c. brachipods
Which of the following statements about catalysts is NOT true?
A. A catalyst alters the rate of a chemical reaction. B. A catalyst can be consumed in a reaction as long as it is regenerated. C. A catalyst does not change the energy of the reactants or the products. D. A catalyst can be used to speed up slow reactions. E. All of the above are true.