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Ore
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: [[Ore]]s are found in different places on the [[Earth's Crust]].
: All [[rock]]s have [[mineral]]s in them but most do not have them in a large enough fraction to be worth the money it would take to [[Extraction of Metals|extract]] a [[metal]] from them.
==Key Stage 4==
===Meaning===
An [[ore]] is [[rock]] that has a large enough amount of a [[mineral]] to be worth [[Extraction of Metals|extracting]] the [[metal]] from that [[mineral]].
===About Ores===
: An [[ore]] may be referred to as a [[Low Grade Ore|low grade '''ore''']] which contains a small [[percentage]] of the [[mineral]] by [[mass]] or a [[High Grade Ore|high grade ore]] which contains a high [[percentage]] of the [[mineral]] by [[mass]].
: The grade of an [[ore]] determines whether it is worth the cost and effort to [[Extraction of Metals|extract]] the [[mineral]].
: [[Low Grade Ore|Low grade '''ores''']] are usually [[Extraction of Metals|extracted]] using [[phytomining]] or [[bioleaching]] which are cheap but take a long time.