Middle school4/4 lessons
Matter and measurement
Recognizing matter, its physical states, its mixtures. Measuring mass, volume, density, mass concentration — the chemist's first quantitative tools.
- 01
The three states of matter
Solid, liquid, gas: three ways to arrange particles. Consequences on shape, volume, and phase transitions.
8 min - 02
Mass, volume, density
Three quantities linked by a simple formula. How to measure each, and why density is a characteristic property.
8 min - 03
Mixtures and solutions
Homogeneous and heterogeneous mixtures, solubility, saturation. How to separate a mixture (filtration, decanting, evaporation).
9 min - 04
Mass concentration
How much solute in a solvent? Mass concentration in g/L and its link to mass and volume.
7 min