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Paper 1
Particle Model of Matter
Both
Describe particle motion, not just spacing.
Key Facts
- Heating increases particle kinetic energy.
- Changing state does not change temperature during the change.
Key Equations
Density = mass / volume
Topics Covered
States of Matter
What you need to know
- •Solids vibrate in fixed positions.
- •Liquids flow, gases move freely.
Exam Tips
- Link particle motion to temperature.
Density
What you need to know
- •Density = mass / volume.
- •Higher density means more mass per volume.
Exam Tips
- Convert units before calculating.
Key Terms
Density
Mass per unit volume.
Internal energy
Total kinetic + potential energy of particles.
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Common Exam Questions
A block has mass 0.45 kg and volume 0.00015 m^3. Find density.
3 marksmediumPaper 1
Model Answer
3000 kg/m^3
What examiners want to see
- ✓Use correct units and formula.
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