In the Fischer esterification reaction, what catalyst is required?
A) a strong acid
B) a strong base
C) either a or b
D) Neither a nor b, the reaction does not need a catalyst.
A
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Cyclone
?
The following questions refer to the above illustration of a middle-latitude cyclone. The dashed lines show the positions of the fronts six hours ago.
Which of the following descriptions is associated with an omega high?
A. It does not stay in the same geographic area for long. B. It produces high surface wind speeds. C. It forms when the flow aloft is meridional. D. It is known as a shallow high.
Forest soils typically have a deep A horizon and shallow B horizon.
Answer the following statement true (T) or false (F)
Ten million years from now, the East African Rift valley system will most closely resemble the modern ________
A) Red Sea B) Appalachian Mountains C) Peru-Chile Trench D) San Andreas Fault
A wind wave that arrives at the coast on a calm day is best referred to as ____
a. an erratic b. an anomaly c. swell d. longshore drifting