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→Key Stage 4
===About Solids===
: When a [[substance]] is in its [[liquid]] [[Stage State of Matter|state]] it is always more [[Density|dense]] than in its [[gas]]eous [[Stage State of Matter|state]] and usually less [[Density|dense]] than its [[solid]] [[Stage State of Matter|state]]. [[Water]] is an exception to this due to how the [[molecule]]s arrange themselves when it is frozen as [[ice]], see [[Ice-Water Anomaly]].
: A [[substance]] which is [[liquid]] at [[Room Temperature|room temperature]] has a larger [[force]] of [[attraction]] between [[particle]]s than a [[subtance]] which is [[gas]] at [[Room Temperature|room temperature]] but a weaker [[force]] of [[attraction]] than a [[substance]] which is [[solid]] at [[Room Temperature|room temperature]].