States of Matter Vocabulary
Name and distinguish the three states of matter — solid, liquid, and gas — using properties vocabulary: hard, rigid, runny, flows, keeps its shape, fills its container; use 'change of state' to describe what happens when materials are heated or cooled
Lesson
Set out your lesson
“Matter can be solid, liquid, or gas. Solids keep their shape, liquids flow and take a container’s shape, and gases spread to fill their container. A change of state happens when heating or cooling changes one state into another.”
Bring to the table
- Ice cube
- Cup of water
- Balloon
- Paper
Extra for the adult
Worked example. Water vapor is invisible. A visible cloud above hot water is made mostly of tiny liquid droplets, so use air in a balloon—not visible “steam”—as the clear gas example.
Optional challenge. Explain how heating or cooling can cause melting, freezing, evaporation, or condensation as changes of state.
What to notice. Save a photo of the three-column chart, or a short note recording two correct classifications and reasons.
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Teaching approaches
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1 approach
Matter can be solid, liquid, or gas. Solids keep their shape, liquids flow and take a container’s shape, and gases spread to fill their container. A change of state happens when heating or cooling changes one state into another.
Spend 10 minutes comparing ice, liquid water, and air in a balloon, then record the melting change of state.
Family records and proof options
Keep a record of your learning
Save photos, notes, and attendance. Export a proof packet for compliance or portfolio reviews.
Learning resources
Extra practice links — they do not replace Gakuva’s teaching approach.
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 States of Matter Vocabulary. 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
- Correctly sort a set of everyday materials as solid, liquid, or gas and give a reason for each
- Use the terms solid, liquid, and gas accurately when describing everyday substances
- Use 'change of state' to describe what happens when ice melts or water boils
“If you point to water, ice, and steam from a kettle, can your child correctly call each one a liquid, solid, or gas — and use those words naturally?”
Curriculum record
- Type
- Language
- Subject
- Science
- Domain
- Matter & Materials
- Age range
- Ages 5–8
Standards