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Chemistry · 0–69 · 9 concepts

Elementary School Chemistry

Reasoning-first Elementary School chemistry: 9 concepts, each with a clear explanation, a fully worked example, and self-check questions.

Practice at this level — free

Matter

Properties of materialsClassifying materials by their propertiesStates of matter (solid, liquid, gas)Mixtures & combining materialsMatter is made of tiny particles (intro)

Changes in matter

Changes of state (melting, freezing, evaporation)Effects of heating & cooling on matterReversible & irreversible changesConservation of matter (intro)