Middle school1/4 lessons published
Matter and measurement
Recognizing matter, its physical states, its mixtures. Measuring mass, volume, density, mass concentration — the chemist's first quantitative tools.
- Lesson 018 min
The three states of matter
Solid, liquid, gas: three ways to arrange particles. Consequences on shape, volume, and phase transitions.
- Lesson 028 minComing soon
Mass, volume, density
Three quantities linked by a simple formula. How to measure each, and why density is a characteristic property.
- Lesson 039 minComing soon
Mixtures and solutions
Homogeneous and heterogeneous mixtures, solubility, saturation. How to separate a mixture (filtration, decanting, evaporation).
- Lesson 047 minComing soon
Mass concentration
How much solute in a solvent? Mass concentration in g/L and its link to mass and volume.