Weather in Action: Clouds

The video explains what clouds are, their composition, and how they form. Clouds are made of tiny water or ice droplets and can form when warm air rises and cools, or in mountainous areas where moist air cools over higher terrain. The dew point is the temperature at which water vapor condenses to form clouds, and when air in a cloud is saturated, relative humidity reaches 100%.

What are clouds primarily composed of?

• Dust particles

• Sheets of gray steel

• Cotton fibers

• Tiny droplets of water or ice

How do clouds typically form when warm air rises?

• The air becomes denser and falls

• The air cools and water vapor condenses

• The air remains unchanged

• The air heats up further

What happens to moist air as it passes over mountains?

• It remains at the same temperature

• It cools and forms clouds

• It heats up and evaporates

• It descends and dries out

What is the dew point?

• The temperature at which ice melts

• The point where clouds disappear

• The highest temperature of the day

• The temperature at which water vapor condenses

What is the relative humidity when the air in a cloud is fully saturated?

• 50%

• 75%

• 100%

• 25%