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==Key Stage 3==
===Meaning===
[[File:ParticleModelSolid.png|right|300px|thumb|The [[Particle Model]] of a [[solid]].]]
A [[State of Matter|state of matter]] where all the [[Particle|particles]] are touching and in a regular arrangement.
===About Solids===
{| class="wikitable"
|+ Solids are a '''state of matter''' that:
|-
|[[File:ParticleModelSolidPour.png|center|600px]]
|-
| style="height:20px; width:600px; text-align:left;" |
*A [[solid]] cannot be poured because the [[particle]]s are in fixed positions.
*[[Solid]]s hold their shape if you leave them alone because the [[particle]]s are in fixed positions.
*[[Solid]]s do not flow because the [[particle]]s are in fixed positions.
|}
{| class="wikitable"
|-
|[[File:ParticleModelSolidSquash.png|center|500px]]
|-
| style="height:20px; width:500px; text-align:left;" |'''Solids''' cannot be squashed into a smaller size because the [[particle]]s are already touching so they can't get any closer together.
|}