Anita Herdt, age 12, of Monwnent, Ken., for her question:

What holds the clouds in the sky?

If you drop a feather from an airplane, it takes a long, long tfme to sink to the ground. It is light, and the playful breezes are strong enough to keep it aloft  for a time. Clouds are even lighter than feathers, and moat of them art born a mile or more above the ground. They are made of microscopic droplets of water with plenty of air between them.

Sometimes the cloud moisture evaporates into vapor, and a cloud becomes water gas mixed with the other gases of the air. But most clouds float on and on, sinking very slowly as they go. Finally they may turn into larger particles and come splashing dawn in raindrops.