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Science Fair Project Idea
thumbnail Every spring, gardeners around the world get ready to plant their summer gardens. They turn the soil over in their garden plots and add nutrients to the soil. Then they plant their seedlings and wait for nature to provide a bounty of fruits, vegetables, and flowers. But nurturing the garden doesn't stop there. In order to get lots of fruits and vegetables, the gardener must eliminate factors that can hurt the plants. Sometimes, chemicals in the soil from other plants and trees can hurt a… Read more
PlantBio_p042
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Time Required Long (2-4 weeks)
Prerequisites You must have access to black walnut trees on your own property, or permission to pick leaves if the tree is on someone else's property. You must also have access to a stovetop.
Material Availability Specialty items are required. See the Materials and Equipment list for details.
Cost Low ($20 - $50)
Safety Minor injury is possible. Use disposable gloves and safety goggles when working with chemical solutions. Don't use the solution made in this science fair project in your home garden. The chemical juglone can remain in the soil, poisoning plants for many years.
Science Fair Project Idea
Lead is a very hazardous element. Even very small amounts can cause health problems, especially in babies and young children. One way to determine if a household item, such as a toy or a piece of jewelry, contains lead is to soak the item in a solution, and then test the solution for lead that might have leached out of the item. The goal of this chemistry science fair project is to determine how varying the pH of the test solution affects its ability to dissolve lead, which is a critical step… Read more
Chem_p080
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Time Required Average (6-10 days)
Prerequisites Some chemistry knowledge will be helpful.
Material Availability Specialty items: You will need a lead test kit, which can be ordered online. See the Materials and Equipment list for details.
Cost Average ($50 - $100)
Safety Adult supervision is required. The chemicals used in this science fair project are potentially hazardous. The test solutions contain lead and should not come into contact with skin or any part of your body. It also contains chemicals that produce a strong "rotten egg" smell, so the procedure should be carried out in a well-ventilated area.
Science Fair Project Idea
Do you know what plants need to grow? Sure, they need soil, water, and sunshine. Everyone knows that. But here's a secret: they also need nitrogen. Plants use nitrogen to make DNA in their cells and the proteins that lead to healthy stems and leaves. The problem is, although the Earth's atmosphere is made up of 78% nitrogen, the form of nitrogen found in the atmosphere cannot be used by plants. So how do plants get their nitrogen? Either through nitrogen deposits in the soil, or through… Read more
PlantBio_p010
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Time Required Very Long (1+ months)
Prerequisites None
Material Availability Specialty items (can easily be purchased online through Carolina Biological Supply Company)
Cost Average ($50 - $100)
Safety Requires adult supervision during use of nitrogen fertilizer
Science Fair Project Idea
thumbnail Hydrogen peroxide (often used as a disinfectant) has also been approved for use in pesticides. This science fair project investigates whether hydrogen peroxide has any effects on seed germination or on roots of plant cuttings. Read more
PlantBio_p036
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Time Required Long (2-4 weeks)
Prerequisites None
Material Availability Readily available
Cost Average ($50 - $100)
Safety Use caution when using the knife. Always use oven mitts when you remove items from an oven. Adult supervision is recommended.
Science Fair Project Idea
thumbnail Living in the industrialized world, like the United States, we are fortunate because we don't have to worry about the quality of our drinking water. Your community has the means to clean and provide water to you. But in many parts of the world, people don't have this luxury. Whether it is due to war or poverty, the lack of clean water leads to many health and social problems. In this environmental engineering science project, you will learn about different methods to filter out impurities in… Read more
EnvEng_p030
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Time Required Average (6-10 days)
Prerequisites You must have access to a stovetop.
Material Availability You will need to purchase a water filter kit. See the Materials and Equipment list for details.
Cost Low ($20 - $50)
Safety You must exercise caution when using a stovetop. Adult supervision is recommended.
Science Fair Project Idea
thumbnail Do you know what is living in your backyard? How about at the playground, or in your compost pile? Nematodes, also called roundworms, are the most abundant animal on Earth and they might be living in any of these places. In this science project you'll isolate nematodes from several soil samples to discover the best nematode habitats. Read more
Zoo_p045
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Time Required Long (2-4 weeks)
Prerequisites None
Material Availability The E. coli culture and the agar plates are specialty items. They can be ordered online (see Materials and Equipment for more details), but you will need to plan ahead.
Cost Low ($20 - $50)
Safety This science project involves the use of the bacterium E. coli. Standard microbiology and bacterial safety guidelines should be followed.
Science Fair Project Idea
thumbnail What covers less than 10% of the Earth's surface, yet is a vital natural resource for terrestrial life? What filters ground water and supports most of our food production, not to mention the production of building materials and paper? The answer, often overlooked, is: soil. With this project you can get all the dirt on soil formation, soil horizons, and the composition of different soils. Read more
EnvSci_p011
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Time Required Average (6-10 days)
Prerequisites None
Material Availability Readily available
Cost Average ($50 - $100)
Safety Minor injury possible
Science Fair Project Idea
thumbnail Every day farmers around the world apply commercial fertilizer to their fruits and vegetables to improve plant health and yield. But applying commercial fertilizer is expensive and not economically possible for some farmers in developing countries. What if they could find a way to fertilize plants cheaply? It turns out that human urine is rich in the nutrients that plants need to grow. Could urine serve as a fertilizer substitute? Find out for yourself in this plant growth science project. Read more
PlantBio_p046
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Time Required Very Long (1+ months)
Prerequisites None
Material Availability To do this project, you will need dirt without any added fertilizer. See the Materials and Equipment list for details.
Cost Low ($20 - $50)
Safety Use caution when handling human urine. Wear gloves when working with human urine. Adult supervision is recommended.
Science Fair Project Idea
You might not know it, but a lake without algae would be a very dull place. If there were no algae, there would be no small animals feeding on the algae, and there wouldn't be any fish eating the small animals that eat the algae. You might conclude that since some algae is good, more algae is even better, but algae growth has a down side. If there is too much algae, they can deplete the oxygen in the water, killing off other species in the water. What is one culprit that leads to algal growth?… Read more
EnvSci_p054
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Time Required Very Long (1+ months)
Material Availability You will need access to a pond or a lake from which to collect water. Students who do not have access to a pond or a lake might want to look at some of the variations, at the end of the project, which use purchased algae cultures.
Cost Low ($20 - $50)
Safety Adult supervision is recommended.
Science Fair Project Idea
thumbnail Everything on our planet is connected together, linked by a giant recycling system called the biogeochemical cycle. It is an amazing process. You can actually investigate how our planet recycles and reuses everything needed to support life by making a small model of the biosphere. What will be important to include in your miniature system so that it can support different types of life? Read more
Geo_p038
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Time Required Very Long (1+ months)
Prerequisites None
Material Availability You will need access to a muddy stream, lake, pond, or march in order to collect mud.
Cost Low ($20 - $50)
Safety Always wash your hands with warm water and soap after handling soil that may contain microorganisms. Use caution if you use a knife. Adult assistance may be needed.
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