What Are the Best Science Fair Projects?


The key to having the best science fair project is to choose a topic that is interesting, unique, and is an attention grabber. You should choose a topic that you enjoy and want to learn more about. With a little thought about your interests, and some online research, you will find the best science fair project for you. To get you started, these are examples of interesting science fair projects for various ages.

Make Your Own Psychrometer

  • You can enhance this science fair project, geared toward students in grades K through 5, for kids through 8th grade. In this project, the student builds a psychrometer to measure the humidity of the air. This figure can help predict the weather.

    Start out by defining the terms psychrometer, relative humidity, evaporative cooling, evaporation, and equilibrium. Answer the following questions: What effect does barometric pressure have on evaporation? Which can hold more water vapor, cool air or warm air?

    Build a psychrometer with two thermometers, gauze, and a piece of styrofoam or wood for mounting. Wrap wet gauze around the bulb of one thermometer. Use a fan to blow air across both thermometers and take readings at regular intervals.

    Document the readings on a chart. Subtract the dry bulb reading from the wet bulb reading and use an online calculator to determine the relative humidity. Do these tests in several areas, like the bathroom with and without the shower running, when cooking pasta on the stove, or when a storm is moving through your town. Chart and then graph your results and conclusions from your experiments.

Colors and Bit Depth in Digital Photos

  • This science fair project, geared toward students in grades 6 through 8, explores how many bits of information is on a digital picture and how many possible colors you can see on a digital photograph.

    The bit depth is the number of colors a viewer can potentially see on a digital picture. Research and define the terms bit, bit depth, binary code, byte and file size. Provide answers to questions such as: What is a bit? How does the number of bits change the file size and colors of a digital photograph? How many bits do you need for a good quality image?

    Choose one picture to work with. Save it several times on your computer. Leave one copy unchanged. Save the other pictures with different settings by changing the number of colors in each frame, which will alter the image.

    Create a grid to document the details of each photograph showing the number of colors, bits per pixel, file size, download time and speed. Create a graph of your findings. Print out each of your pictures for references.

Reaction Times of Video Game Players and Non-Video Game Players

  • You can alter this project, geared toward children in grades 6 through 8, for students in any grade by making it simpler or more complex. The objective of this project is to compare the reaction times of experienced and inexperienced video game players.

    First, learn about sensory stimulus, motor cortex, reaction time, and arithmetic mean. Find the answers to the questions: How is reaction time defined? What factors can influence reaction time? Do different senses result in different reaction times?

    Find at least five volunteers who are experienced video game players and five who are not. Find a reaction test online and stick with this one test for your entire project. Let the volunteers have 10 practice reaction-time tests.

    Your experiment begins with each volunteer taking five reaction-time tests as you record the results in a table or grid,. Use one grid for experienced game players and one for non-experienced game players. Find the average reaction time for each volunteer. Analyze your results and provide a graph or other report to share your thoughts about your findings.

Reaction Times While On A Cell Phone

  • This science project for students in grades 9 through 12 examines if talking on a cell phone really does affect a person's reaction time.

    Start out by leaning and defining the terms attention, reaction time, stopping distance, statistical significance, and null hypothesis. Next, research and find answers to these questions: What have other experiments or studies found in regarding driving and using a cell phone at the same time? What is the null hypothesis for this experiment? How do you design an experiment to test human behavior?

    Create a list of questions to engage your subjects in conversation while they complete the tests. Determine the number of trials needed to get consistent results and prepare the reaction-time test. Recruit at least 20 volunteers.

    Test each volunteer's reaction time when talking on a hands-free cell phone, while on a hands-on cell phone, and when doing the reaction test without talking on the phone. Document the results of the tests, analyze the results, and then create graphs to show the results.


  • Photo Credit Brand X Pictures/Brand X Pictures/Getty Images
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