1.   Air molecules are so small that each weighs just five times ten to the minus twenty-six kilograms.

2.   The volume of the world was turned up so the air molecules hummed a deep bass note.

3.   Amid the audible breathing and the quiet whoosh of bodies slamming into air molecules, there was a sound out of place.

4.   As temperatures rise, the density of air decreases as air molecules move faster and spread farther apart.

5.   As the aluminum vaporizes, there are few air molecules in the chamber to impede the aluminum from forming a uniform coat.

6.   Even a few air molecules can slow the electrons down, so the tube needs a total vacuum.

7.   The material allows air molecules to escape but is impervious to liquid molecules.

8.   The particles that make up the cat are constantly jostling each other and being bombarded with air molecules and photons of light.

9.   They strike air molecules, transferring energy to them and cause gases to glow just as neon in a tube glows when electricity flows through it.

10.   Violet, blue, green, yellow, orange, and red, which comprise sunlight, are scattered helter-skelter by air molecules.