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Examining the effect of temperature on bacteriaFeatured science projectScience project video


Bacteria that were exposed to temperatures of 60 degrees Celsius and 100 degrees Celsius were observed not to have any growth when transferred to the Petri dishes, whereas bacteria exposed to -78 degrees Celsius and 0 degrees Celsius were observed to have a significant amount of growth. Bacteria that were left at room temperature is the control group.

Hence, it may be concluded that the high temperatures such as 60 degrees Celsius and 100 degrees Celsius destroyed the bacteria, whereas lower temperatures of -78 degrees Celsius and 0 degrees Celsius are still within the optimal range of temperatures that are suitable for bacteria growth.

Bacteria Effect of temperature on bacterial growth
  -78 degrees Celsius 0 degrees Celsius 25 degrees Celsius 60 degrees Celsius 100 degrees Celsius
E Coli 42.5 45 49.5 0 0
Streptococcus 23.5 24.5 31 0 0
Bacillus 37 38 43 0 0

Use the graph below to plot the experimental data recorded in the table above.
 bacteria and temperature science project

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Complexity level:
Project cost ($):
Time required:
Preparation will take approximately one day, while observation and recording of data will be completed over a period of five days
Material availability:
Access to laboratory equipment (eg. petri dishes)
Safety concerns:

Always follow laboratory safety guidelines and always practice sterile technique when handling microbes. Never have any food or drink at your workstation and always thoroughly wash your hands with disinfectant soap or alcohol before leaving your workstation. Always dispose of used material in a biohazard bag. If none are available, the bacteria should be destroyed with bleach before being disposed of