Tornadoes in the United States occur as a result of the interaction of warm, moist _____ air masses with cold, dry ____ air masses.
(a) mT; cP
(b) cP; mT
(c) mP; cP
(d) mT; mP
Ans: (a) mT; cP
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Igneous rocks with an andesitic composition ________
A) are found primarily in continental interiors B) are denser than granitic compositional rocks C) make up most of the sea floor D) are denser than basaltic compositional rocks
The polar front occurs in which of the following regions?
A) 30 degrees B) 30 to 60 degrees C) 60 degrees D) 60 to 90 degrees E) Poles (90 degrees)
The basic unit of pressure mapped on weather maps is ________
A) pounds per square inch B) knots C) miles per hour D) millibars E) micrometers
From a chemical standpoint, the three reacting agents of greatest importance to weathering are ________
A) hydrogen, oxygen, and nitrogen B) oxygen, nitrogen, and carbon dioxide C) carbon dioxide, oxygen, and water D) water vapor, nitrogen, and carbon dioxide E) argon, aluminum, and calcium