Question

the ratio of actual water vapor in the air to the amount needed to saturate the air is known as?
○ relative humidity
○ absolute humidity
○ dew point

Explanation:

To solve this, we recall the definitions:

• Relative humidity is the ratio of actual water vapor in air to the amount needed for saturation.
• Absolute humidity is the mass of water vapor per unit volume of air.
• Dew point is the temperature at which air becomes saturated.

So the ratio described matches relative humidity.

Answer:

A. relative humidity