| Property | Solids | Liquids | Gases | |
|---|---|---|---|---|
| 1 | Shape | Definite | Take the shape of the container, but do not necessarily occupy all of it. | Take the shape of the container by occupying whole of the space available to them. |
| 2 | Volume | Definite | Definite | Take the volume of the container. |
| 3 | Compressibility | Almost nil | Almost nil | Very large |
| 4 | Fluidity or Rigidity | Rigid | Fluid | Fluid |
| 5 | Density | Large | Large | Very small |
| 6 | Diffusion | Generally do not diffuse | Diffuse slowly | Diffuse rapidly |
| 7 | Free surfaces | Any number of free surfaces | Only one free surface | Nofreesurface. |
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