21.   In turn, the ground chills a layer of overlying air, coaxing invisible water vapor to condense into tiny water droplets.

22.   Life may have begun not in the sea but in tiny water droplets drifting high in the sky.

23.   Once a layer of still air in contact with the chilling ground is cooled sufficiently, invisible water vapor condenses into trillions of tiny water droplets, forming fog.

24.   Rapidly falling water droplets from the shower move the air in a circle, creating a vortex with a low pressure center that sucks in the curtain.

25.   Scientists from Italy and the United States have shown that organic compounds from some pollutants can increase the number of water droplets in clouds.

26.   She testified that planes are tested for flying through tiny water droplets -- essentially clouds -- but not through freezing rain, which would be more challenging.

27.   Steam up a bathroom, for example, turn off the light and watch what happens to a flashlight beam as the light waves bounce off water droplets.

28.   The balls of ice gathered minute unfrozen water droplets and grew into large hailstones that pelted the landscape.

29.   The existing standards contemplate cloud-borne water droplets no larger than about half the diameter of a human hair.

30.   The final product contains water droplets, air bubbles, fat globules and ordered crystals of milk fat that form as the churned material cools.