Question

which statement describes what will most likely occur when warm air cools and the temperature drops to the dew point?
air will contain more water vapor.
dew will form on leaves.
clouds will disappear.
water vapor in the air will evaporate.

Explanation:

• Air will contain more water vapor: When air cools to the dew point, it is saturated with water vapor. Cooling further would lead to condensation, not an increase in water - vapor content.
• Dew will form on leaves: Dew forms when the air cools to the dew point. At this temperature, the air is saturated, and water vapor condenses on cool surfaces like leaves.
• Clouds will disappear: Clouds are formed when air is cooled to its dew point (or below) and water vapor condenses around tiny particles. When air cools to the dew point, if there are surfaces (like leaves) for condensation, dew forms. But clouds are not likely to disappear as they are also a result of condensation (in the atmosphere).
• Water vapor in the air will evaporate: Evaporation requires an increase in energy (heating). When air cools to the dew point, the process is condensation (opposite of evaporation).

Answer:

Dew will form on leaves.