Movement, however, is also a characteristic of the non-living world. Differential heating of air produces wind. Differential heating of water produces currents. Powerful Idea Movement is a pervasive characteristic of matter. All matter is made of molecules.
All molecules are constantly in motion.
To repeat, molecules and atoms are constantly in motion throughout the natural world. To Ponder 1. If you are a coffee or tea drinker, and if you use sugar, you know that sugar will dissolve faster in hot tea or coffee than it will in iced tea or coffee. That is, a given amount of sugar will dissolve faster in a given volume of water at higher temperature than at lower temperature. This is an example of rate of diffusion , which is the amount of solute that goes into solution per unit time .