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| Pregunta | Respuesta |
| Solid | Particles in this state can only vibrate about a fixed point. The forces between the particles are very strong. |
| Liquid | Particles in this state have some energy. The particles are only free to move past each other. The forces are weaker than in a solid. |
| Gas | The particles in this state have lots of energy and little force to hold the particles together. |
| Evaporation | During this change of state the particles in a liquid is given enough thermal energy to move free of the other particles. |
| Condensation | This change of state means particles lose energy and can now only move past each other. The forces between the atoms become stronger. |
| Freezing | This change of state removes energy from particles. The particles are then unable to move and can only vibrate around a fixed point. |
| Melting | This change of state gives particles in a solid enough energy to allow them to move past one another. |
| Conductor | This material allows heat and electricity to pass through easily. Metals are good at this because they have free electrons. |
| Insulator | A material that is a poor transmitter of heat and electricity. Plastics and gases are good examples of this. |
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