Cluster True - False
NOTE: (Each question of this kind consists of a series of statements related to the stem that precedes
them. Write T or F by each question.)
A given volume of dry air contains a variety of gases representative of the earth's atmosphere.
Indicate which of the following statements most accurately states the composition of this variety.
a. Nitrogen, oxygen, argon, carbon dioxide, and minute amounts of other gases.
b. Water vapor, dust, and salt particles.
c. A percentage of gases varying with the temperature of the air.
d. One percent of other gases, 21 percent oxygen, and 78 percent nitrogen.
e. Fifty percent oxygen, 48 percent nitrogen, and 2 percent argon.
Match the statements in column I with the terms to which they apply in column II by writing the
proper letter by each question. Items in column II may be used once, more than once, or not at all.