What forms when air cools to its dew point and condensation nuclei are present?

What forms when air cools to its dew point and condensation nuclei are present?

• A. Fog
• B. Clouds
• C. Dew
• D. Mist

Answer: (B)

Clouds form when air cools to the dew point and condensation nuclei are present. As water vapor in the air reaches saturation, it condenses onto tiny particles already in the air (condensation nuclei). Those countless tiny droplets come together to become a visible cloud high in the sky. Fog is the same idea at ground level, so it’s considered a surface cloud rather than a sky cloud; dew is condensation on surfaces, not in the air; mist is a lighter, near-ground cloud. The essential concept is that saturation with nuclei leads to the formation of cloud droplets that you can see as a cloud.

Clouds form when air cools to the dew point and condensation nuclei are present. As water vapor in the air reaches saturation, it condenses onto tiny particles already in the air (condensation nuclei). Those countless tiny droplets come together to become a visible cloud high in the sky. Fog is the same idea at ground level, so it’s considered a surface cloud rather than a sky cloud; dew is condensation on surfaces, not in the air; mist is a lighter, near-ground cloud. The essential concept is that saturation with nuclei leads to the formation of cloud droplets that you can see as a cloud.