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Molecular Biology Science Fair Project

Examining Bacteria and Temperature

Hard
Examining Bacteria and Temperature | Science Fair Projects | STEM Projects
We're going to investigate how different temperatures affect the growth of three types of bacteria. We'll measure the size of the bacterial colonies after five days and see what temperatures are best for bacteria growth.

Hypothesis

The hypothesis is that bacteria will be deactivated and destroyed at temperatures above 60 degrees Celsius.

Method & Materials

You will divide the Petri dishes and test tubes into three groups, label them according to the species of bacteria, and place them in beakers with different temperatures. After two hours, you will swab the test tubes onto the Petri dishes and incubate them for five days.
You will need 15 agar Petri dishes, 15 disinfected swabs, a bottle of disinfected water, 15 test tubes and a rack, a measuring cylinder, 50 ml E Coil bacteria culture, 50 ml Streptococcus bacteria culture, 50 ml Bacillus bacteria culture, a marker pen, 5 beakers, 2 hot plates, 3 thermometers, a bag of ice, a bag of dry ice, and a clock.

Results

The results showed that the high temperatures of 60 degrees Celsius and 100 degrees Celsius destroyed the bacteria, while the lower temperatures of -78 degrees Celsius and 0 degrees Celsius were still within the optimal range of temperatures for bacteria growth. The control group, which was left at room temperature, showed significant growth.

Why do this project?

This science project is interesting because it explores how temperature affects the growth of bacteria, which is an important factor in understanding how bacteria can spread diseases and cause people to become ill.

Also Consider

Variations of this project could include repeating the experiment with different temperatures and species of bacteria, such as Staphylococcus or Campylobacter.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

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