The particle model
Lesson 7 / 8
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Lesson outcome
I can describe the particle model of matter and how it explains the properties of solids, liquids, and gases.
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There are three states of matter: solid state, liquid state, and gas state.
A substance in the gas state can be compressed because there is empty space between the particles.
A substance in the liquid or solid state cannot be compressed because the particles are already touching.
A substance in the gas or liquid state has no fixed shape as the particles can move past each other.
A substance in the solid state will not flow because the particles vibrate in a fixed position.
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