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Home / Science projects / High School Science Fair Projects
  • High School Science Fair Projects

    High School Science Fair Projects

    Below are ideas to get you started developing a project of your own. Choose a topic that interests you, then begin your research and build your project's hypothesis from there!

    All high school projects require a high level of original thought and development, so these ideas are merely springboards to help you develop your own project. To participate in upper-level competition, a project should be relevant to current science and technology and should present a benefit to society. 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.

    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.

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    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.
    • 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.


    • 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 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 efficiency of various octane levels.

    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 project ideas, we recommend the Science Buddies website.

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By: Luyanda
Date: Mar 11, 2015

I need an advanced science project on the digestive system or the anatomy for a science fair.  Thanks

By: hunter
Date: Mar 07, 2015

please help me get a biology project….please i want a simple one.

By: mopo
Date: Feb 25, 2015

Great experiments! Cool presentation of a knowledge is priceless… Science can truly be fun and kids love that… I wrote about

why emotions attached to learning are key for higher retention of the material…feel free to get more details and some experiments

for kids here *****************************

By: ugocukwu
Date: Feb 20, 2015

can you help me to make a project no science grade 9 that is science fair project for grade 9

i went make car .peales. thanks God bless you.

By: arla
Date: Feb 17, 2015

Please help, I need a biology project for a high school science fair.

By: sahib Rajab
Date: Feb 05, 2015

Need an engineering project for high school science fair, please help.

By: roneshia
Date: Jan 16, 2015

i want a sample projet to do for school and that is it

By: mckenzie
Date: Nov 06, 2014

your website did not help at alll

By: Habeke Bekele
Date: Sep 28, 2014

Well, I have two in mind right now and the only reason I’m not working on them is because One of them is well…. freaky!

Here are the two projects:

Effect of caffeine on daphnia heart rate

Effect of music on bacterial growth

By: vishal
Date: Sep 19, 2014

simpel project