REET Level 2 study notes
Matter: States, Properties and Changes
Matter is anything that has mass and occupies space. For REET Level 2, the key school-level map is solid, liquid and gas; heating and cooling changes such as melting, freezing, evaporation, boiling, condensation and sublimation; the difference between physical and chemical change; and mixtures, solutions and separation methods. The teaching emphasis is evidence: whether a new substance forms, whether the material is uniform, and which physical method can separate components.
Key points
- Matter has mass and occupies space; solids, liquids and gases differ in shape, volume and particle movement.
- Melting, freezing, evaporation, boiling, condensation and sublimation are state changes linked to heat.
- Physical change usually changes form or state without forming a new substance.
- Chemical change forms new substances; rusting, burning and curd setting are school-level examples.
- A solution is a uniform mixture; every solution is a mixture, but every mixture is not a solution.
- Filtration, decantation, evaporation and magnetic separation connect mixtures to classroom activities.
- REET MCQs often test evidence, not word memory: new substance, uniformity and separation method matter.
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Matter is anything that has mass and occupies space. For REET Level 2, the key school-level map is solid, liquid and gas; heating and cooling changes such as melting, freezing, evaporation, boiling, condensation and sublimation; the difference between physical and chemical change; and mixtures, solutions and separation methods. The teaching emphasis is evidence: whether a new substance forms, whether the material is uniform,...