Particle Model

Recall the three states of matter: solid, liquid, and gas, and describe the conditions under which melting, freezing, boiling, and condensing occur.
Explain the main features of the particle model, recognizing that it represents particles as small, solid spheres to explain changes of state.
Distinguish between physical changes and chemical changes in relation to states of matter.
Explain the limitations of the simple particle model, specifically noting that particles are not genuinely inelastic solid spheres and that the model does not account for the forces between them.
Interpret and draw simple diagrams representing substances in solid, liquid, and gas states.
Predict the state of a given substance at various temperatures using provided data.
Relate the size and scale of atoms to physical objects in the real world.

What you need to know