How Materials Change State

ScienceMatter & MaterialsAges 11–12

Explain melting, freezing, boiling, condensing, and sublimation using the particle model, interpreting heating and cooling curves to identify melting and boiling points

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Teaching Table

Set out your lesson

Practise the bounded task in How Materials Change State; see exact limits before inferring broader coverage.

Activity

Can read temperature and time; this is a supplied-data lesson, with no heating or boiling activity.

Policy

Exact directed source edges retained; earlier authorship is not learner attainment.

Materials

These supplied stage cards
Scrap paper and pencil; oral/pointing response where appropriate

Sequence

Read readiness and decide on support without treating prerequisite authoring as learner readiness.
Open Show first and explain its model.
Use Guided Try with support and its separate adult key.
Close Show and guided keys before Try, unless this Try is explicitly supported.
Reflect on an actual attempt, including help used.

No Printer

Use the supplied screen cards; copying the exact task to paper is optional, not required.

Privacy

Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.

Use the complete materials on screen or print only the current sheet. Keep adult guidance out of learner view. Retain an earlier model only when the current step supplies it as context.

Teaching limits and safe use

These are finite task opportunities, not proof of mastery. Record what was attempted and what support was used.

Ideal pure-substance heating data only; cooling curves and an actual boiling plateau are not supplied. No hot substances used.

Use only invented scenarios and optional anonymous local notes. Do not request names, photos, family finances, medical data, accounts or uploads. Stop uncomfortable physical activity.

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Entire curriculum

1590 concepts · 8 subjects

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Teaching approaches

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1 approach

Selected Default Gakuva

Practise the bounded task in How Materials Change State; see exact limits before inferring broader coverage.

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Learning resources

External links for extra practice. They do not replace Gakuva’s teaching approach.

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Check understanding

Describes what happens to particles during each change of state
Reads a heating/cooling curve and identifies the melting point and boiling point from the flat regions
Explains why temperature stays constant during a change of state
Distinguishes between evaporation (from surface, any temperature) and boiling (throughout liquid, at boiling point)

“If your child was heating a block of ice in a pan and drew a graph of temperature over time, could they explain why the line goes flat at certain points — and what's happening to the particles when it does?”

Curriculum record

Type: Conceptual
Subject: Science
Domain: Matter & Materials
Age range: Ages 11–12

Standards

uk-nc-2013:KS3.Sci.Chem.PNM.2uk-nc-2013:KS3.Sci.Chem.PNM.4