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Item WC007001: The humidity of air can increase and it can decrease.

Which of the following statements is TRUE about changes to the humidity of air at a particular place over time?

  1. The humidity of air can increase, but it cannot decrease.
  2. The humidity of air can decrease, but it cannot increase.
  3. The humidity of air can increase, and it can decrease.
  4. The humidity of air cannot change.
Distribution of responses
Answer Choice
Overall
Grades
Gender
Primary Language
 
n = 1456
6–8
n = 945
9–12
n = 511
Male
n = 712
Female
n = 721
English
n = 1306
Other
n = 102
A. 9% 8% 10% 10% 8% 8% 13%
B. 12% 12% 13% 15% 10% 12% 11%
C. 72% 73% 70% 68% 76% 72% 71%
D. 7% 7% 7% 7% 7% 7% 6%