Question

what occurs when the air temperature is equal to the dew - point temperature? (1 point)
the relative humidity is 0%, so evaporation occurs.
the relative humidity is 0%, so condensation occurs.
the relative humidity is 100%, so condensation occurs.
the relative humidity is 100%, so evaporation occurs.

Explanation:

When the air temperature is equal to the dew - point temperature, the air is saturated with water vapor. Saturated air has a relative humidity of 100%. At this point, condensation occurs as the air can no longer hold all the water vapor in the gaseous state. Evaporation does not occur under these conditions as the air is already at its maximum capacity to hold water vapor.

Answer:

The relative humidity is 100%, so condensation occurs.