What is Petri dish?
[[File:Szalka_petriego.jpg|thumb|right|200px|This is a Petri dish.]] A '''petri dish''' is a small dish shaped like a [[cylinder]]. [[Scientist]]s use it to grow [[cell]]s from [[animal]]s, [[fungus]], and [[disease]]s so they can study them. They are usually made of [[glass]] or [[plastic]]. The glass ones can be used again if they are heated at 160°[[Fahrenheit|F]]. Sometimes people fill them with [[agar]], which helps cells grow. These are called 'agar plates'. Many people use them in [[science]] classes at [[school]]. They have lids so [[Pathogen|germs]] in the air can not get into them, or ''contaminate'' them, and ruin the experiment. {{sci-stub}} {{LaboratoryEquipment}} [[Category:Laboratory equipment]]