Sciences et espace · 3–4
States of matter
Matter is anything that takes up space. Solids keep their shape, liquids flow to fit their container, and gases spread out to fill the available space.
À retenir
Les points essentiels
- A solid has a fixed shape and volume.
- A liquid has a fixed volume but changes shape.
- A gas has no fixed shape or volume.
- Heating and cooling can change matter’s state.
Mots utiles
Vocabulaire de la notion
- Melting
- A solid changing into a liquid.
- Freezing
- A liquid changing into a solid.
- Evaporation
- A liquid changing into a gas at its surface.
- Condensation
- A gas changing into a liquid.