Item WC006001: The amount of water vapor in the air can increase and it can decrease.

Which of the following statements is TRUE about changes to the amount of water vapor in air at a particular place over time?

  1. The amount of water vapor in air can increase, but it cannot decrease.
  2. The amount of water vapor in air can decrease, but it cannot increase.
  3. The amount of water vapor in air can increase, and it can decrease.
  4. The amount of water vapor in air cannot change.

Distribution of Responses

Chart showing distrubtion of responses for Item WC006001

Percent of students responding correctly

Overall50%
Grades 6–850%
Grades 9–1250%
Male52%
Female50%
Primary Language is English50%
Primary Language is not English52%

View data table