Year 9Fundamentals
States of Matter
Particle arrangement, energy levels, and phase changes in solids, liquids, and gases.
Key Concepts
- Solids have fixed volume and shape with tightly packed particles.
- Liquids take the shape of their container but maintain fixed volume.
- Gases expand to fill any container with high particle movement.
Example Formulas & Reactions
Water (Liquid)H2O (l)
Ice (Solid)H2O (s)
Steam (Gas)H2O (g)