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Extreme temperatures and its effect on the growth of bacteriaFeatured science projectScience project video

Conclusion

Extreme high temperatures will kill more bacteria. As the temperature lowered, more bacteria colonies survived.

This information is vital for scientists to develop effective methods for killing harmful bacteria. Knowing the tolerance levels of bacteria can help scientists and doctors establish a minimum temperature for sterilizing medical equipment to prevent contamination.

Also consider

Study the nature of the bacteria in this experiment. How do they differ?

What causes the discrepancies between their heat tolerance levels?

What are the other alternatives to kill bacteria?

References

http://www.microbiologybytes.com/iandi/3a.html

http://en.wikipedia.org/wiki/Bacteria

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Complexity level:
9
Project cost ($):
50
Time required:
2 hours to prepare (Day 0), 7 days incubation period (Day 1 to Day 7), 15 minutes each day (from Day 1 to Day 7), 30 minutes to transfer samples on Petri Dish (Day 8) 24 hours for inoculation, Observation on Day 9
Material availability:
The school biology laboratory should provide all the necessary materials.
Safety concerns:

Goggles and gloves must be worn at all times to prevent contamination as we’re dealing with biohazardous materials. Adult supervision encouraged.