Why might dew form in the morning?

The temperature rose overnight, and warmer air can hold more water vapor.
The temperature rose overnight, and warmer air can hold more water vapor.

The temperature rose overnight, and warmer air can hold less water vapor.
The temperature rose overnight, and warmer air can hold less water vapor.

The temperature fell overnight, and colder air can hold less water vapor.
The temperature fell overnight, and colder air can hold less water vapor.

The temperature fell overnight, and colder air can hold more water vapor.

1 answer

Dew forms in the morning primarily due to the cooling of air overnight. The correct explanation is:

The temperature fell overnight, and colder air can hold less water vapor.

As the temperature drops overnight, the air becomes saturated, reaching its dew point. When air cools to its dew point, the water vapor in the air condenses into liquid water, forming dew.