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===About the Ice-Water Anomaly===
: For most [[substance]]s the [[solid]] [[State of Matter|state]] is more [[Density|dense]] than the [[liquid]] [[State of Matter|state]]. However, this is not the case for [[water]].
: In [[liquid]] [[water]] the [[molecule]]s are randomly arranged and close together. In Whereas in [[solid]] [[water]] the [[molecule]]s align with their [[Hydrogen]] [[atom]]s touching the [[Oxygen]] [[atom]]s of adjacent [[molecule]]s.
{| class="wikitable"
| style="height:20px; width:200px; text-align:center;" |The same number of [[molecule]]s takes up a larger [[Volume (Space)|volume]] in [[solid]] [[water]], so [[Ice]] is less [[Density|dense]] than [[liquid]] [[water]].
|}
==Key Stage 4==
===Meaning===
The [[Ice-Water Anomaly]] is the [[observation]] that [[water]] in its [[solid]] [[State of Matter|state]] is less [[Density|dense]] than [[water]] in its [[liquid]] [[State of Matter|state]].
===About the Ice-Water Anomaly===
: For most [[substance]]s the [[solid]] [[State of Matter|state]] is more [[Density|dense]] than the [[liquid]] [[State of Matter|state]]. However, this is not the case for [[water]].
: [[Water]] is known as a [[Polar Molecule|polar molecule]] which means one part is slightly [[Positive Charge|positively charged]] and the other is slightly [[Negative Charge|negatively charged]]. Since there is strong [[force]] of [[attraction]] pulling the [[electron]]s towards to [[Oxygen]] [[atom]] in [[water]] then the [[Oxygen]] becomes slightly [[Negative Charge|negative]] and the [[Hydrogen]] [[atom]]s become slightly [[Positive Charge|positively charged]]. This causes the [[molecule]]s to line up with a [[Hydrogen]] of one [[molecule]] touching the [[Oxygen]] in another [[molecule]].
===Extra Information===
{{#ev:youtube|https://www.youtube.com/watch?v=UukRgqzk-KE}}