The Particle Model · Physical Science

States of Matter

Using the particle model to explain expansion, contraction, density, and changes of state.

Key Questions

  1. 1How can we explain the behavior of a gas using a model we cannot see?
  2. 2What causes a solid to turn into a liquid at a specific temperature?
  3. 3Why do different substances expand at different rates when heated?

ACARA Content Descriptions

AC9S8U04
Year: Year 8
Subject: Science
Unit: The Particle Model
Period: Physical Science

Suggested Methodologies

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Distinguishing between changes that create new substances and those that only change appearance.

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