How Do You Grow Bacteria In Agar Petri Dishes?

Agar makes an ideal growing medium for bacteria. This material is often put into petri dishes, which makes it simple to safely grow and store bacteria. While they are often used by scientists, anybody is capable of using them.

This makes for a fun, and maybe shocking, experiment to find out what type of bacteria grows on every day household items such as phones, toothbrushes or even your hands. Agar petri dish projects are easy to perform regardless of your prior experience. Keep the agar petri dishes stored upside down in a refrigerator until you are ready to use them.

Remove the agar petri dishes from the refrigerator and let them warm up to room temperature. It normally takes about one hour for them to warm up. Remove the lid of the petri dish and press the agar against any surface.

If you cannot hold it directly against a surface, you can use a cotton swab. Rub the cotton swab against any surface and press it gently against the agar. Put the lid on the petri dish and tape it shut ... more.

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