Seventh Grade Microbiology Science Projects (6 results)

Microorganisms are all around us, with an amazing diversity of adaptations. They were the first life on Earth, and their relatively recent discovery in extreme environments—like hot springs, ocean vents, and polar ice—illustrates how tenaciously they've evolved and survived. Microbiology gives us insights into evolution, disease, and even the mechanisms of our own cells. Explore our collection of microbiology projects to learn more about these tiny and amazing organisms.

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Science Buddies Original
Germ Invasion
Science Fair Project Idea
Microbes are everywhere in our environment, but for the most part they escape our notice. This project shows you how to safely culture and study common bacteria from your everyday surroundings. Read more
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- Less Details
Time Required Average (6-10 days)
Tinkering
Prerequisites
Material Availability A kit for this project is available from our partner Home Science Tools.
Cost Average ($40 - $80)
Safety Follow the safety precautions for handling microorganisms listed in the Procedure.
Science Buddies Original
Yeast Reproduction in Sugar Substitutes
Science Fair Project Idea
There is nothing quite like the smell of fresh-baked bread to make your mouth water! As any baker can tell you, you cannot bake bread without yeast. Yeast actually eat sugar so that they can reproduce and make more yeast, and make bread dough rise. But can they use sugar substitutes to do this? In this science project you will get to investigate how well yeast grow with sugar substitutes as a food source. Pass the butter, please! Read more
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- Less Details
Time Required Short (2-5 days)
Tinkering
Prerequisites None
Material Availability A kit for this project is available from our partner Home Science Tools. See the Materials section for details.
Cost Low ($20 - $50)
Safety No issues
Science Buddies Original
How Do Food Preservatives Affect the Growth of Microorganisms?
Science Fair Project Idea
This project uses liquid cultures and agar plates to investigate the effects of different concentrations of a food preservative on microbial growth. Read more
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- Less Details
Time Required Average (6-10 days)
Tinkering
Prerequisites To do this project, you will need access to a laboratory with facilities for culturing bacteria. You should be familiar with sterile technique and proper handling of bacterial cultures.
Material Availability Specialty items
Cost Average ($50 - $100)
Safety Standard precautions for handling bacterial cultures.
Science Buddies Original
How Do Bacteria Produce Power in a Microbial Fuel Cell?
Science Fair Project Idea
Bacteria are powerful little creatures. They can dispose of contaminants, make us sick and did you know they can even generate electricity? In devices, called microbial fuel cells (MFC) they can extract electrons from their food sources such as organic materials and feed them into an electrical circuit to generate power. This way they can even turn plain soil into a source of energy! Does it matter though what kind of food the bacteria "eat"? Find out how bacteria grow in a microbial fuel cell… Read more
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- Less Details
Time Required Very Long (1+ months)
Tinkering
Prerequisites Previous experience using a multimeter and familiarity with the physics of electricity is helpful, but not required. A basic knowledge of how to work with bacteria is also recommended to complete this science fair project. Consult the Microbiology Techniques and Troubleshooting guide for information on how to conduct microbiology experiments.
Material Availability The Microbial Fuel Cell Kit needs to be special ordered from our partner Home Science Tools.
Cost Very High (over $150)
Safety Be sure to wear the gloves supplied with the kit when handling the microbial fuel cell's electrodes (its cathode and anode). The electrodes are made of a conductive material called graphite fiber and should not be placed near electronics or power plugs, or have their fibers dispersed in the air. Use sterile technique when growing the bacteria. Read the Microorganisms Safety Guide before starting any experiments. SRC approval may be necessary. Adult supervision is recommended.
Science Buddies Original
The End Zone: Measuring Antimicrobial Effectiveness with Zones of Inhibition
Science Fair Project Idea
Have you heard that garlic powder is supposed to inhibit the growth of bacteria? Which do you think would make a better disinfectant: a solution of garlic powder or a solution of bleach? This project shows you a straightforward way to compare the effectiveness of different disinfectants (or other antimicrobial agents), by measuring zones of inhibition on a culture plate. Read more
+ More Details
- Less Details
Time Required Average (6-10 days)
Tinkering
Prerequisites To do this project, you will need access to a laboratory with facilities for culturing bacteria. You should be familiar with sterile technique and proper handling of bacterial cultures.
Material Availability A kit for this project is available from our partner Home Science Tools.
Cost Average ($50 - $100)
Safety Follow the general safety precautions for handling microorganisms outlined at the end of the Procedure for this science project.
Science Buddies Original
Can Garlic Prevent Crown Gall?
Science Fair Project Idea
Crown gall is a plant disease caused by the soil bacterium Agrobacterium tumefaciens. This project uses tomato plants to investigate whether garlic extract can prevent crown gall infection. Read more
+ More Details
- Less Details
Time Required Long (2-4 weeks)
Tinkering
Prerequisites You will need a plant with an existing crown gall infection as a source of bacteria for this project.
Material Availability Readily available
Cost Low ($20 - $50)
Safety Use caution when cutting with sharp knife or razor blade.
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