Which of the following conditions likely occurs because of the low-level jet stream that forms over the central plains of the United States?
A. nighttime thunderstorms
B. onset of a chinook
C. development of El Niño
D. influx of cold polar air
Answer: A
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Indicate whether the statement is true or false
Ammonium nitrate is a component of both fertilizers and explosives. Ammonium nitrate has nitrogen, hydrogen and oxygen atoms in the ratio 2:4:3. What is the correct formula for ammonium nitrate?
A) N4H8O6 B) N2H4O3 C) N1H2O1.5 D) all of these
A strong dollar is always desirable for foreign trade
Indicate whether the statement is true or false
One of the ________ effective ways to stabilize populations is to ________.
A. Least; provide free contraceptives B. Least; decrease child mortality C. Most; expect mandatory sterilization D. Most; provide free contraceptives E. Most; decrease child mortality