Despite weighing tons, clouds seem to free-float in the air. How do the billowy marvels stay up in the sky?
Clouds can range in color from brilliant white to almost black. Why?
On a summer day, a thunderstorm can appear out of nowhere and disappear just as fast. What causes a storm to change so suddenly?
Clouds form when warm, moist air rises to a greater altitude, causing it to expand and cool. Eventually, water vapor in the cooled air condenses into the droplets that form clouds.