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High School Science Fair Projects

Below you'll find a list of high school science fair projects.

Choose a topic that interests you, then begin your preliminary research.

In time, you'll develop a hypothesis that can be tested!

High school science fair projects require a high level of original thought and development.

Consider these ideas as springboards to help develop your own original project.

To participate in an upper-level competition, your project should be relevant to current science and technology. The project should also present a benefit to society.

High School Science Fair Project Resources

Start brainstorming by looking at the ISEF categories; it's also a good idea to check the ISEF guidelines before you choose a topic.

– For tips on performing your experiment and presenting your project, see our free science fair guide.

– Browse our Science Fair Supplies category for more project ideas and helpful kits.

Ideas for High School Science Fair Projects

Life Science

• Compare the effect of antibiotics on gram-positive and gram-negative bacteria. (Grow your own cultures with agar & petri dishes. For a sample procedure and more project ideas, see our bacteria science project guide.)
• Run a bioassay to test for toxicity in water or soil.
• Test the effect of ultraviolet radiation on bacteria growth.
• Do different types of bread grow different types of mold? Does temperature or light affect mold growth?
• Experiment with plant genetics (plant hybrids, cross-breeding).
• Test factors like smoke or pollution that might affect transpiration rates for plants.
• Investigate the effects of increased oxygen or carbon dioxide concentration on plant germination.
• Find out the differences in properties and effects of organic vs. chemical fertilizers.

Earth Science

• Explore methods of erosion prevention, test effects of different soil composition on erosion (e.g. how does more clay compare to more sand?).
• Experiment with methods of flood management and containment.
• Investigate the effects of sunspots on weather patterns.
• Work with methods for forecasting weather.
• Test the concentration and effect of minerals and pH in soil and water samples. (Use water test strips and a soil analyzer.)
• Determine chemical makeup of rain in your area; test possible hazardous effects.

Physical Science

• Study acoustic models and methods of noise control. (A sound measurement kit/ might be helpful.)
• Experiment with the effect of storage temperatures on batteries.
• Develop improvements in battery chargers; try methods of using solar cells to recharge batteries.
• Compare the bending strength and durability of different building materials.
• Build a potato-powered battery.
• Experiment with building materials that are fire-preventative.
• Design industrial uses of magnets; test the effects of magnetic and electromagnetic fields on living organisms such as brine shrimp.
• Design a project in advanced robotic programming.
• Build a sensor-moving advanced bristlebot robot.

Chemistry

• Test the effects of the pH level of a solution on the corrosion of iron and copper; explore different methods of corrosion prevention.
• Experiment with types, effectiveness, and the impact on the nutritional value of preservatives in food.
• Compare the properties and effects of artificial sweetener vs. sugar or other natural sweeteners. (For this and the following tests, you might consider the Chemistry of Food kit.)
• Test the chemical properties and physiological impact of saturated, unsaturated, and trans fats.
• Use indophenol to test the effect of different cooking methods on the depletion of vitamin C in food.
• Investigate the role of enzymes and yeast in the fermentation or cheese-making process.
• Experiment with different methods of water filtration/purification (such as solar distillation).
• Analyze the by-products of gasoline; compare the efficiency of various octane levels.
• Conduct an orange juice titration demonstration

Environmental Science

• Compare or develop methods of hydrogen production and storage for use in fuel cells.
• Investigate methods of improving home insulation.
• Experiment with expanded uses of solar energy.
• Test methods for cleaning up and neutralizing the effect of oil in salt water with this oil spill cleanup kit.
• Work with methods of processing/recycling non-biodegradable items; experiment with decomposition aids.
• Experiment with design and function of wind turbines or water wheels.
• Test for harmful effects of pesticides; test or develop natural/organic alternatives; test the effectiveness of common pesticides such as DEET.
• Which type and color of roofing material provides the most energy efficiency?

For more in-depth high school science fair project ideas, we recommend the Science Buddies website.

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