Last updated: September 21, 2022
Help your child or student kick-start their science fair project with one of these great options! Here is your connection to some of the best free project plans available.
- Life Sciences Project Ideas
- Physical Sciences Project Ideas
- Engineering, Computer and Math Sciences Project Ideas
- Earth Sciences Project Ideas
Life Sciences Projects
These are science fair project ideas in biology, human anatomy, medicine, nutrition, plants, and animals.
Grades 6-8 biology project evaluating glucose metabolism in yeast.
Grades 3-6 biology project that uses magnets to emulate the process scientists use to duplicate DNA, using the polymerase chain reaction.
Grades 6-8, Will aspirin work faster if taken with a carbohydrate food? Test aspirin dissolution in a variety of carbohydrate solutions.
Grades 3-6 biology – In this project, you collect samples of bacteria from a variety of surfaces to find the dirtiest surfaces. Includes a video of the experiment. See the comments for a project idea to test how well a variety of soaps clean your hands.
Grades 6-8, Which toothpaste cleans your teeth best? Grow bacteria from your freshly-brushed teeth in petri dishes to find out.
Grades K-5, What does photosynthesis do to grass? In this fun experiment you’ll see a concrete and visually striking illustration of photosynthesis.
Grades 2-5, Fruits, molasses, sugar, honey, corn syrup, or jelly? The goal of this science fair project is to explore which foods yeast cells eat.
Grades 9-12, Measure the densities of various fruits and vegetables to determine if there is a relationship between density and nutritional value.
Grades 9-12 Wild-type and GAPDH mutant Caenorhabditis elegans are used as an example of how glucose or sugar affects the lifespan of humans.
Grades 9-12, Does acid rain have a negative impact on seedling germination? This project uses distilled vinegar solutions to simulate acid rain conditions to find out.
Grades 3-6, Use fake stomach juice to simulate how antacids work to reduce heartburn.
Grades 3-6, Test the effects of different types of music on the performance of mice in a maze. No mice are harmed in these experiments.
Grades 2-5, Find out how hand-eye coordination changes as children get older. Ingredients for this project include a stop watch, ping-pong ball, and kids of different ages.
Grades 9-12, Is garlic a useful natural antibiotic? Test it on milk in petri dishes to find out.
Grades 6-8, Do plants grow better in a hydroponic solution than in soil? Is this a practical solution to the lack of arable land to feed a growing world population?
Grades 6-8, Learn how a puppy’s proportions, growth, and weight change in the earliest months of its life.
Grades 7-10, Most people are left-handed or right-handed. Do animals favor one paw like people do hands? Test a bunch of pets to find out.
Grades 7-10, Study the behavior of bats in the wild, based on the sounds that they make. How do they use echolocation to find a meal? When are they most active?
Grades 4-6, Environmental conditions can dramatically impact plant growth and germination. Does increased ozone stunt germination and plant growth? Grow some plants and find out.
Grades 6-8, Pick a species of bird and determine if there is a relationship between air temperature and where and when the birds migrate.
Grades 7-10, They’re here today but could be gone tomorrow. Examine the migratory path of a bird species and the similarities and differences between their winter and summer habitats. Recommend which locations should be preserved to protect these species.
Grades 6-8, Can people tell the difference between a fake smile and a real one? Gather information from dozens of volunteers to find out.
Grades 6-10, Plants respond to gravity by stems that grow upward and roots that grow downward. Experiment with germinating seeds and rotate them to make up down and down up. How do you think the growing seedlings will respond?
Grades K-3, Learn whether plants can live and grow when ‘watered’ with juice, soda, or milk.
Grades 1-5, Find out which colors are easier and more difficult to read at a distance. This super simple project requires volunteers and color charts you can print from the web.
Physical Sciences Projects
These are science fair project ideas for aerodynamics, chemistry, energy, food science, light, sound and physics.
Grades 6-10, Learn about the properties of surface water tension and use it to propel a raft.
Grades 9-12, Use dry ice and an electrostatic generator to observe air streams and hi-speed air-threads.
Grades 4-7, Use veggie power to build a simple battery from a variety of vegetables. Which ones are the most powerful?
Grades 1-2, Can you make a battery from 24 cents? Make a battery from a pile of coins and find out how different amounts of coins affect the amount of energy produced.
Grades 1-2, Play with your food by testing how well different kinds of sandwich wraps keep bread fresh. Is the most expensive one the best? Or does the cheapest work just as well?
Grades 6-12, Learn how to create an electromagent from batteries, wire and a nail. How does changing the kind of batteries used affect the power of your electromagnet? How do the number of wraps affect it?
Grades 7-10, Separate recycled objects to demonstrate how mixtures are made and the variance in the physical properties of their ingredients.
Grades 3-10, Investigate the chemistry of rust and the oxidation process. Younger students will use steel wool, water, salt and vinegar. Older students will explore the chemistry of rust.
Grades 9-12, Do raw foods contain more calories than cooked foods? Use a bomb calorimeter to measure and calculate the amount of energy (calories) within various foods, ignite food samples, calculate change in temperature.
Grades 6-8, Figure out the best temperature for making the largest, purest crystals using water and borax.
Grades 4-7, Comets are often compared to large, dirty snowballs, and the comet tail you see in the sky is evidence of melting. In this project, you’ll use figure out how the size of a comet affects its melting rate.
Grades 3-5, Pendulums have been used for timekeeping for hundreds of years. Find out how changes in mass and length affect the oscillation of a pendulum.
Grades 7-10, Explore “star gangs” in the Milky Way and beyond. Globular cluster are compact groups of about a million stars that move around in galaxies. Use statistical data to learn how globular clusters help us better understand the universe.
Grades 3-6, Many people avoid eggs because of allergies or diet preferences. But eggs play an important chemical function in baking and cooking. Evaluate the ability of egg substitutes to mimic their binding, leavening, or thickening properties.
Grades 3-6, We’re used to cooking our pasta in a big pot of boiling water. But do you really need that much water, time, and energy to cook pasta? Perform some experiments to find out.
Grades 2-5, Use a blender and a magnet to find out how much iron is in different kinds of breakfast cereal.
Grades 9-12, Test how the addition of salt and other substances to water affects the freezing point of the water-based solution. Is rock salt and ice the best combination for freezing ice cream?
Grades 6-8, Use magenets and ball bearings to build a rifle based on magnetism. Investigate how many magnet and ball bearing “stages” affect the velocity and distance of the projectile.
Grades 6-8, Do you know someone who needs to take medication daily? Build a sensor that reminds patients when to take their medication.
Grades 9-12, Examine the possibilities for water as part of the fuel cycle for the future. How efficient is a cobalt-based catalyst at helping to form molecular oxygen?
Grades 6-8, Experiment with different ways to cool a can of soda. Find out the fastest way to get your tall cold drink.
Grades 6-8, Figure out exactly what concentration of salt in water is required to make an egg float.
Grades 4-7, They fly through the air with the greatest of ease. Find ways to put a ping pong ball accurately on target time after time.
Grades 1-5, Use balloons, a rubber ball and a scarf to investigate why those socks stick together when you take them out of the dryer and how conditions in the air affect static electricity.
Grades 6-8, Explore the energy of living things. Prove that different varieties of nuts produce energy in a series of experiments.
Engineering, Computer & Math Sciences Projects
These science fair project ideas include engineering, materials science, computer science, computer games, math and music, and pure mathematics.
Grades 3-6, Put the energy of rubber bands to work and learn about the relationship between potential and kinetic energy.
Grades 5-8, Find out why those carnival games are so hard. Learn the basic laws of science that help the concessionaires engineer the games in their favor.
Grades 3-6, This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.
Grades 2-5, Put your paper airplane making and flying skills to the test. Design and fly a variety of different planes and determine which design flies the farthest.
Grades 4-7, Tell you folks tonight is a good night for an egg dinner. Use the eggshells to explore how arches distribute weight. Demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.
Grades 6-8, Test several kinds of metal exposed to the air, tap water, and salt water to determine which are the most resistant to corrosion, and which substances are the most corrosive to them.
Grades 6-8, Learn how smoke detectors work, and compare the effectiveness of ionizing smoke detectors to photoelectric smoke detectors.
Grades 9-12, In this project, students investigate the applicability of Benford’s Law to many sets of everyday data, such as lists of country populations, utility bills or the distance of various stars from earth.
Grades 9-12, Determine the mathematical patterns in classical music using these suggestions.
Grades 9-12, Build you own maglev (magnetic levitation) system and demonstrate how eddy currents work.
Grades 9-12, Measure cell phone radiation from several distances when making a call and when texting.
Grades 6-8, Explore electronics and solar energy by building the Frightened Grasshopper, a solar-powered bug.
Grades 6-8, Test the load-bearing capacity of several types of beams, including I-beams, U-beams, rectangular beams, and T-beams.
Grades 9-12, Configure a micro-controller to efficiently power your laptop, using Enstein’s Laws of Physics.
Grades 1-4, How much memory does a computer use to “remember” a series of letters? Find out how much memory a computer uses to remember 1000 letters.
Grades 6-9, Experiment with how different kinds of wheels affect the speed of a skateboard. You’ll calculate friction co-efficient and its correlation to velocity.
Grades 9-12, Old lighthouses have historic significance. Give them a new life with a modern interior redesign.
Grades 6-8, Construct a robot equipped with sound/touch sensor circuitry. Run it through a maze to find out if it displays sequential or random movement.
Grades 6-8, Identify items that need repurposing such as e-waste, batteries and mattresses. Then get creative and Invent your own original repurposed design.
Grades 2-5, Find out how Internet search engines work and how you can get different results depending on the type of information you request.
Grades 6-12, Create your own computer-animated story using Carnegie Mellon’s 3D programming software. You’ll learn computer programming with easy-to-use drag and drop tools.
Grades 6-8, In this project, you’ll identify electricity “vampires” in your home, such as computer peripherals and electronic equipment, that use power even when not in use. Find out exactly how much power they use. Use this eye-opening data to help your family save money on electricity.
Grades 7-10, Build a drum set using household materials, a computer, Scratch, and a PicoBoard. Program you drum set to create a synthesized Hip hop, rap, classical, techno, or electronic drumbeat.
Grades 2-5, Build an aeolipile (Hero’s Engine) to explore Isaac Newton’s Third Law – for every action there is an equal and opposite reaction. Can you predict the movement of the Hero’s Engine?
Grades 9-12, Use the mathematics of paper folding to learn the practical applications of particular origami folding techniques. Create your own origami, or make modifications to existing designs. Origami Sightings has some mind-blowing applications of origami concepts.
Earth Sciences Projects
These science fair project ideas include the environment, ecology, ecosystems, geology, geography, ocean, and weather.
Grades 1-5, Experiment with sand, clay and loam and find out which type of soil dissolves most easily.
Grades 2-5, Find out which materials are biodegradable, and which ones are not. How can you use this information to help the environment?
Grades 8-12, Harmful algal blooms affect the quality of water and impact people, marine animals and birds. Study how water quality changes before, during and after algal blooms.
Grades 6-12, Model the subterranean movement of water, using Darcy’s Law. How can this information be used in hazardous material spills?
Grades 4-6, Explore the effects of blade size and shape when constructing a windmill.
Grades 1-4, Can you tell what’s inside a geode from looking at the outside? Learn more out these unique rocks and crack some open to discover the surprises inside.
Grades 9-12, Use your bananas peels, newspapers, leaves and coffee grounds to create compost. Find out if enough energy is generated from the compost to heat water.
Grades 2-4, Gather up some jars, bowls and ice water to determine how the amount of ice affects condensation.
Grades 6-8, Some soils do not absorb water very well. Find out why and if washing detergent and change their ability to absorb water.
Grades 2-5, Learn more about weather and other aspects of meteorology by using instruments you build. Make a barometer, hygrometer, anemometer… even lightning!
Grades 6-8, Make a psychrometer to measure relative humidity, then use it to measure RH in a variety of weather conditions.
Grades 3-6, Use a pinwheel and a can of boiling water to simulate geothermal power production. Determine how to generate the most energy from your “power plant.”
Grades 6-10, Soak some limestone rocks in varying amounts of acidic water. Determine how much acidity is needed to make them dissolve.
Grades 6-8, Test your local grated storm drain inlets to see if they’re up to the task of keeping plastic litter out of your community’s storm water drainage system. If they’re not, work on improving the design.
Grades 6-8, Can liquid water float on liquid water? Investigate how the density of water is affected by its temperature and salinity.
Grades 2-5, Can you get petroleum oil from a stone? Find out which kinds of rocks can soak up and store the most oil. Learn how petroleum geologists and engineers use this information to find the best places to get oil from the earth.
Grades 2-6, How do organic materials become soil? This science experiment measures what materials biodegrade.
Grades 2-6, Water carries lots of soil and minerals in a creek. In this project, you’ll examine the behavior of water and gravel in creek beds and the formation of sedimentary rocks.
Grades 9-12, How does the ecological footprint work? Figure out how big your footprint is.
Grades 6-8, Make systematic observations about the weather conditions needed to create radiation fog. Can you forecast when and where it will occur?
Grades 6-8, Study the effect of water depth on wave velocity. Learn how tsunamis form and create your own simulation model wave tank to create a tsunami.
Grades 9-12, Collect data on hurricane strength and sea surface temperature to determine if cooling occurs and if it can be measured with the passing of a hurricane.
Grades 6-9, Find out how much of the energy from the sun that reaches a photovoltaic cell is converted into electricity. Predict how to position solar cells for maximum conversion.
Grades 6-12, Use an oatmeal box and some paper to demonstrate seafloor spreading.
Grades 1-5, Discover how water is more powerful than rocks. Experiment with ways that water can break rock.