For my project I am seeing how much bacteria multiplies depending on the amount of time it is left in the open air.

However, I need to incubate the bacteria, but I have no idea how to.

I have heard you can use your oven, but i am not sure how accurate that is.

Please keep in mind that I DO NOT have access to a high end lab. All input is appreciated.
Thank you for your time

,
Tonksie013