Grade 5 · Science · Lesson 10

States of Matter & Changes

Everything around you is made of matter, and matter usually shows up in one of three familiar states: solid, liquid, or gas. The state depends on how the tiny particles inside are arranged and how fast they are moving. Add or remove energy (usually heat) and matter can change from one state to another.

What this lesson teaches

1Compare the particle arrangement in solids, liquids, and gases
2Name the six phase changes between states of matter
3Explain how adding or removing energy causes a change of state
4Identify everyday examples of melting, freezing, evaporation, and condensation

🔒 Member-only content

Unlock the full lesson

Subscribe to access the complete mini-lesson, guided practice, interactive exercises, and printable PDF for this lesson — plus all 1,680 lessons across grades 1–6.

See membership plans Try a free lesson first

The first lesson of every subject is free — no account required.