Which of the following defines
humidity?
A. measure of the amount of water vapor in the
air
B. measure of the amount of hydrogen in the air
C. measure of the amount of distance between
molecules in the air
D. measure of the amount of air pressure on a
body of water
Answer: A. Measure the amount of water vapor in the air.
Explanation: Humidity is when a quantity of water vapor is in the atmosphere, likewise, measuring the water vapor in the air would directly define humidity.