Science Matter & Materials Conceptual 8–9 yrs

Solids, Liquids & Gases

固体、液体与气体

Description

Compare and group materials as solids, liquids, or gases based on their observable properties and behaviour

Mastery Evidence

✓ Define solids (fixed shape, hard to compress), liquids (flow, take shape of container), gases (spread out, fill space)
✓ Sort at least eight everyday materials into solid, liquid, or gas categories
✓ Explain tricky cases like sand (solid particles) or steam (gas, not visible water droplets)

Assessment Prompt

Can your child explain the difference between a solid like ice, a liquid like water, and a gas like steam, and sort everyday things into these three groups?