SC-423
Particle model of matter
Lower Sec Science · Secondary 1 · Medium · Particle model of matter
A sealed syringe contains air. When the plunger is pushed in, the volume of air decreases but its mass stays the same. Using the particle model, which statement best explains this?
- Particles are pushed closer together but their number stays the same
- Some particles are destroyed so the mass decreases
- Each particle becomes smaller so the mass decreases
- Particles stop moving so the volume becomes zero
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