SC-434
Particle model of matter
Lower Sec Science · Secondary 1 · Hard · Particle model of matter
A metal rod is gently heated at one end. Its length is measured before and after heating and is found to have increased slightly. Which statement best explains this using the particle model?
- Particles move faster and move further apart, so the rod expands
- Particles move faster and become closer, so the rod expands
- Particles move faster and break free into a gas, making the rod longer
- Particles move slower and move further apart, so the rod expands
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