Separating Mixtures
Select and carry out appropriate separation techniques for different types of mixtures: filtration (insoluble solids), distillation (liquids by boiling point), crystallisation (dissolved solids), and chromatography (coloured substances)
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Separating Mixtures means practising the idea at the table with a simple hands-on check. We will demo once, then your child tries.
Materials: Two everyday materials (e.g. ice cube / warm water / salt / spoon); Clear cup and paper for notes. 1. Say the goal of Separating Mixtures in plain words once. 2. Adult shows one property or state change and names solid/liquid/gas or a material property. 3. Child tests three samples and records a property or state observation each time. 4. Fresh check: one fresh property or state observation. Record and stop. Done: three property/state notes with evidence. Proof: parent note of examples and results. Stop: End after the fresh check; keep optional challenge for another day.
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Start practiceSeparating Mixtures practice
Practice key ideas from Separating Mixtures.
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Learning resources
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PhET Interactive Simulations · Practice link — not the full lesson
States of Matter: Basics
Before you open · source notes
States of Matter: Basics supports hands-on exploration for Separating Mixtures. Not every lab worksheet.
Free interactive page, no sign-in required for the tested path.
Before you openAsk the learner what they changed in the sim or page and what they observed.
Opening this link does not save learning or assess mastery.
Source, access and review notes
Public PhET Interactive Simulations page. An anonymous GET on 2026-11-12 returned HTTP 200 with no login or payment prompt for this URL. Opening the link does not save practice or assess mastery. An adult should preview and guide the learner.
PhET Interactive Simulations. “States of Matter: Basics.” External page; Gakuva does not copy, host, embed, or redistribute materials.
Unknown — link only
Check understanding
- Selects the correct separation technique for a given mixture with justification
- Describes the steps of simple distillation and explains why it works
- Interprets a chromatography result (Rf values, number of components)
- Explains why filtration removes sand from water but not salt
“If your child needed to separate salt from sand mixed together in water, could they describe two stages of separation, the equipment needed, and explain why each step works?”
Curriculum record
- Type
- Procedural
- Subject
- Science
- Domain
- Matter & Materials
- Age range
- Ages 11–13
Standards