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===Meaning===
[[File:PetriDish.png|right|300px|thumb|A '''petri dish''' with a scale stuck on for [[measuring]] sizes.]]
A '''petri dish''' is a [[transparent]] container used to make [[observation]]s of living [[organism]]s.
===About Petri Dishes===
: '''Petri Dishes''' can be used as a container to grow seedlings.
: '''Petri Dishes''' are used to contain [[tissue]]s for study.
: '''Petri Dishes''' are filled with a [[Growth Medium|growth medium]] in order to grow [[bacteria]]l colonies for study.
: '''Petri Dishes''' are destroyed after being used to grow [[bacteria]] to prevent their spread.
===Examples===
{| class="wikitable"
|-
|[[File:GrowthMedium.png|center|200px]]
|[[File:BacterialColonies1.png|center|200px]]
|-
| style="height:20px; width:200px; text-align:center;" |A '''petri dish''' containing a [[Growth Medium|growth medium]].
| style="height:20px; width:200px; text-align:center;" |Several colonies of [[bacteria]] being grown in a '''petri dish'''.
|}
==Key Stage 4==
===Meaning===
[[File:PetriDish.png|right|300px|thumb|A '''petri dish''' with a scale stuck on for [[measuring]] sizes.]]
A '''petri dish''' is a [[transparent]] container used to make [[observation]]s of living [[organism]]s.
===About Petri Dishes===
: A '''petri dish''' is a piece of [[Observational Equipment|observational equipment]].
: '''Petri Dishes''' can be used as a container to grow seedlings.
: '''Petri Dishes''' are used to contain [[tissue]]s for study.