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Study Guide : Solids, Liquids & Gases

Learner Guide

Solids, Liquids & Gases




Everything is made of particles. The arrangement of these particles and how they move determines their state. There are three physical states of matter: solid, liquid and gas.











The particles in solids are packed close together in a regular arrangement, due to the strong forces of attraction between particles. They are not able to move but they vibrate about a fixed position e.g. ice.




The particles in liquids are fairly close together and arranged at random. They still have forces of attraction keeping them close, but not as strong as solids. They are able to move and can take the shape of the bottom of their container e.g. water.




The particles in gases are also randomly arranged but have very

little forces of attraction between them so are free to move. The

particles are widely spaced and spread to fill the container

e.g. water vapour.




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Related Topics


Forces-movement                Electricity                          Energy


Waves                                  Electromagnetism              Space


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