Author Question: Air is best described as a(n) ________. A) chemical compound B) element C) mixture D) colloid ... (Read 300 times)

washai · **on:** Jul 13, 2018

Air is best described as a(n) ________.

A) chemical compound
B) element
C) mixture
D) colloid
E) particulate

Question 2

Water vapor is nearly absent in ________.

A) the upper reaches of the atmosphere
B) the lower reaches of the atmosphere
C) the troposphere
D) the atmosphere over sea surfaces
E) the atmosphere over land surfaces