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===Meaning===
[[File:TestTube.png|right|300px|thumb|A pair of '''test tubes'''.]]
A '''test tube''' is a [[glass ]] container used as a container for small [[Volume (Space)|volumes]] of [[chemical]]s in [[Chemical Reaction|chemical reactions]].
===About Test Tubes===
: A '''test tube''' has a [[Volume (Space)|volume]] of around 9[[ml]].
==Key Stage 4==
===Meaning===
A '''test tube''' is a [[glass]] container used as a container for small [[Volume (Space)|volumes]] of [[chemical]]s in [[Chemical Reaction|chemical reactions]].
===About Test Tubes===
: A '''test tube''' is a [[Reaction Vessel|reaction vessel]] for [[Reaction Mixture|reaction mixtures]] less than 9[[Millilitre|ml]] in [[Volume (Space)|volume]].