5.1. Particle theory of matter. Classification of matter.
5.1b. Practice questions about properties of matter.
5.2. Physical properties. 5.6. Characteristic physical properties incl. density.
5.3. Chemical properties. Chemical changes.
Example of a chemical change: Magnesium + Oxygen gas. Warning: Don't look at the light directly. (Look with your peripheral [side] vision.)
Example of a chemical change: Sugar (fuel) + Potassium chlorate (oxidizer).