How can you tell they’ve got it: Pure Substances & Mixtures?

If they’ve got it, you’ll see things like: Explains why a pure substance has a sharp, fixed melting point but a mixture melts over a range; Identifies common formulations (medicines, alloys, paints, fuels) as deliberate mixtures; Explains what impurities do to melting and boiling points; Distinguishes mixtures from compounds at the particle level. Or just try it together: If your child was checking whether a sample of water was pure, could they explain one test they could do — and say what result would tell them it was definitely pure versus a mixture?

Science Matter & Materials Ages 11–13

Pure Substances & Mixtures

Your child can test if water is pure. A pure substance melts and boils at one set temperature. A mixture melts and boils over a range instead.

In curriculum terms

Distinguish between pure substances and mixtures, identify formulations as useful mixtures with precise compositions, and use melting and boiling points to test for purity

Ages are typical, not deadlines — follow your child’s pace. How to help at home →

How to tell they’ve got it

Tick these off as you see them — no test required.

Explains why a pure substance has a sharp, fixed melting point but a mixture melts over a range
Identifies common formulations (medicines, alloys, paints, fuels) as deliberate mixtures
Explains what impurities do to melting and boiling points
Distinguishes mixtures from compounds at the particle level

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Try this together

If your child was checking whether a sample of water was pure, could they explain one test they could do — and say what result would tell them it was definitely pure versus a mixture?

Where this sits on the map

Stuck here? Check the skills it builds on first. Confident? Here’s what it unlocks.

Builds on

Dissolving & Solutionsages 9–10KS3 purity and formulations extends KS2 dissolving and solutions

Atoms, Elements & Compoundsages 11–12Purity is defined at the atomic/molecular level — distinguishing compounds from mixtures requires atoms/elements knowledge

Pure Substances & Mixturesthis skill · ages 11–13

Unlocks

Separating Mixturesages 11–13Separation techniques are chosen based on whether a substance is a mixture or pure compound

solid = must come firstdashed = helps

Curriculum alignment

Where this fits in the official school curriculum — our best automated guess, not yet checked by a person.

Show candidate curriculum codes · 1 VIC

Australian Curriculum v9 candidate

This skill sits outside the F–6 Australian Curriculum — no candidate code matched (v0.1).

Victorian Curriculum 2.0 codes & levels only

VC2S6U03medium confidenceScience · Levels 5 and 6 · Science Understanding strand

These are candidate alignments generated by semantic matching — machine-suggested and unreviewed (v0.1), not official or verified mappings. For official curriculum content see australiancurriculum.edu.au, curriculum.nsw.edu.au and f10.vcaa.vic.edu.au. Don’t rely on them for registration or compliance purposes.

Nearby on the map

Atoms, Elements & Compoundsages 11–12 How Materials Change Stateages 11–12 Metals vs Non-Metalsages 11–13 Physical vs Chemical Changesages 11–13

All Matter & Materials skills →