It’s pretty easy to believe that solids and liquids are made up of atoms and molecules, but it may be harder to accept that air is also made of these tiny particles. A good example that shows that air ...

One reason is moving air currents or convection ... but because the bonds between separate molecules are usually less tight, liquids expand more than solids. The water level in the capillary ...

Dissolving a solid in a liquid depends on the interactions and attractions ... Explain that as the water evaporates, water molecules go into the air. The water molecules that evaporate become a gas ...