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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: kylee
    Date: Apr 08, 2017

    how to clean up oil’s spills by using paper towel,cottons ball, iron fillings and margenent

    By: zykemia venerable
    Date: Dec 18, 2015

    nice job I love the ideas like the one forecasting weather NICE JOB!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

    By: Julie
    Date: Nov 28, 2015

    My 8th grader was going to do science project on how bacteria growth reacts to music. The science teacher who originally approved the project, later advised my son would need to grow yeast instead of bacteria.

    Wher as before my son would just get the bacteria sample off a door handle, I’m unsure as to where to get the yest sample. Can it just be baking yeast or beer brewing yeast. Are there prepped Petri dishes with yeast already in them?

    Please advise.

    Thank you

    By: p.a.aditya
    Date: Sep 08, 2015

    how can produce electricity from bio-gas?

    By: Samkelo Pilson
    Date: Jul 22, 2015

    I will like to do physics science because I’m more interested in electrons devices.

    By: roneshia
    Date: Jan 16, 2015

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

    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: jj
    Date: Sep 07, 2014

    Heyyyyyy… i’m in 9th grade and I need to do a science project (on anything). if you have any ideas, please email me.