Understanding Matter and Energy, Pure Substances and Mixtures

3.1 distinguish between pure substances and mixtures. ▹
3.2 state the postulates of the particle theory of matter (all matter is made up of particles; all particles are in constant motion; all particles of one substance are identical; temperature affects the speed at which particles move; in a gas, there are spaces between the particles; in liquids and solids, the particles are close together and have strong forces of attraction between them). ▹
3.4 distinguish between solutions and mechanical mixtures. ▹
3.5 describe the processes used to separate mixtures or solutions into their components, and identify some industrial applications of these processes. ▹
3.8 describe the concentration of a solution in qualitative terms (e.g., dilute, concentrated) and in quantitative terms (e.g., 5 grams of salt in 1000 ml of water. ▹