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Science Fair Project Idea
Maybe somewhere in your home there's a long hallway or a stairway with a light that you can turn on from either end. It's a nice convenience, but did you ever wonder how it's wired up to work that way? The goal of this project is to build a similar circuit with switches, flashlight batteries and a flashlight bulb (obviously, household circuits are not safe to experiment with). You'll need to understand the difference between connections made in series and connections made in parallel in an… Read more
Elec_p045
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Time Required Short (2-5 days)
Science Fair Project Idea
thumbnail A nice hot cup of tea sure can wake and warm you up in the morning. In this science fair project, you will investigate the chemistry of tea. The longer you steep a tea bag in hot water, the stronger the tea will be. But how does the strength of the tea change with longer brewing time? In this food science project, you will make a very simple electronic device to measure the strength of tea. The device will determine how strong the tea is by measuring the amount of light the tea absorbs. Read more
FoodSci_p058
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Time Required Average (6-10 days)
Prerequisites None
Material Availability Readily available
Cost Average ($50 - $100)
Safety Adult supervision is required when boiling water.
Science Fair Project Idea
thumbnail Are you fascinated by radioactivity and the emission of particles caused by the disintegration of an atom? This science project enables you to observe safely a spectacular display of radioactive decay. Following the instructions in the Procedure, you will be able to isolate a safe radioactive source and build a cloud chamber to watch the radioactive decay. Then you will use your cloud chamber to discover if a plastic lid can shield you from this type of radioactive decay particles. Read more
Phys_p086
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Time Required Average (6-10 days)
Prerequisites Basic understanding of, or willingness to study independently, the atomic model and what radiation is.
Material Availability Specialty items are required. See the Materials tab for details.
Cost Average ($50 - $100)
Safety

You will be working with radioactive material in this science project; it is completely safe as long as the simple safety instructions in the Procedure are followed.

This project uses isopropyl alcohol, a flammable product. Do not use it near an open flame or anything hot.

Dry ice is colder than regular ice and can damage your skin. Wear insulating gloves when handling it.

If you choose to take apart a smoke detector, be very careful when cutting through metal or plastic. Cut edges might be sharp. Adult help and supervision is required. Minor injury is possible.

Science Fair Project Idea
Have you ever wondered what makes water 'bead' up on a freshly waxed car? In this project you'll investigate the chemistry of surface tension by measuring how many drops of water a penny can hold. What happens if you add salt or detergent to the water? Read more
Chem_p021
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Time Required Short (2-5 days)
Prerequisites None
Material Availability Readily available
Cost Very Low (under $20)
Safety No issues
Science Fair Project Idea
You probably know that you can use iron filings to reveal the magnetic field produced by a strong magnet. If you sandwich the iron filings between pieces of waxed paper, you can make a permanent record of your magnetic experiments (Gardner, 2004, 66). Cover the wax paper sandwich with a layer of brown paper (from a roll, or cut open a paper shopping bag), and then (with an adult's help) use a hot, dry iron to seal the waxed paper together. You will have to experiment a little with your iron… Read more
Elec_p043
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Time Required Short (2-5 days)
Science Fair Project Idea
Here's a puzzle you may have heard before which you can build as a simple electric circuit. First, the puzzle: a farmer is traveling to market with his cat, a chicken and some corn. He has to cross a river, and the only way to cross is in a small boat which can hold the farmer and just one of the three items he has with him. The problem is, he has to be very careful about what he chooses to leave behind at any time. If the cat and chicken are left alone, the cat will eat the chicken. If… Read more
Elec_p046
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Time Required Average (6-10 days)
Science Fair Project Idea
thumbnail Electronic devices can be designed to detect dangerous fumes or other hazards, such as smoke or carbon monoxide. In this electronics project, you will build another potentially life-saving detector—a radon detector. Radon gas is radioactive and can pose a hazard to your health if you live in an area where it leaks from the ground. In this electronics science project, you will learn how to collect radon with an ordinary dusting cloth mounted on the intake of a fan, and then measure its… Read more
Elec_p064
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Time Required Very Long (1+ months)
Prerequisites Since the goal of this science project is to measure radon gas, you should have access to an area that has previously tested positive for radon with a commercial radon detection system. See the Experimental Procedure section for details. This is an advanced science project that will require creative problem solving on your part.
Material Availability While most of the parts for this science project are readily available, you might need to be creative about finding or making some of the parts.
Cost High ($100 - $150)
Safety Wear safety goggles when drilling and soldering. Adult supervision is recommended.
Science Fair Project Idea
thumbnail You might know that we are able to get free energy from the Sun, the wind, and water, but did you know we can get free energy from Earth itself? The temperature inside of Earth can reach 9,000°F—that kind of heat can be used to make a lot of energy here on the surface! This source of energy is called geothermal energy and it is all about taking advantage of the heat within Earth. So try this science fair project out and find out how to use the heat that lies beneath your feet! Read more
Energy_p023
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Time Required Very Short (≤ 1 day)
Prerequisites None
Material Availability Readily available
Cost Low ($20 - $50)
Safety You will be working with a hot stove top. Please exercise caution when working with hot surfaces and with steam. Steam can cause painful burns.
Science Fair Project Idea
What is cooking? Cooking is applying heat to food in order to help make it taste good. But the decision to cook your food doesn't end there. Do you want to cook it at a low temperature for a long time or do you want to apply high heat and cook or sear it right away? You might think that a pot is just something in which to cook your food, but it is also a cooking tool. Pots and pans are made from different kinds of materials, such as aluminum, stainless steel, iron, and ceramics. Each of these… Read more
FoodSci_p031
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Time Required Short (2-5 days)
Prerequisites Access to cooking pots made of different materials.
Material Availability Readily available
Cost Low ($20 - $50)
Safety Minor injury possible. Always exercise caution when using a stove. Adult supervision is required. Make sure that the cooking pots you have chosen to test are designed for stovetop use.
Science Fair Project Idea
You've seen that a magnet's attractive force can cause a small object (like a paper clip) to "jump" to the magnet. So a magnetic field can act through the air, but what about other materials? Here's an experiment you can do to find out. You'll need a strong bar magnet, a stack of books, a paper clip, some thread and tape. Place the bar magnet underneath the top book in your stack, so that it sticks out. Tie a piece of thread (as long as the stack of books is high) to a paper clip. You… Read more
Elec_p042
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Time Required Very Short (≤ 1 day)
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