Science Fair Project Ideas

Below is a list of great ideas for potential science fair projects. Pick something you're interested in and try it out for size. The projects are categorized by their difficulty.

If you're not sure about which project to pick, why not take our Quiz to see which project you might be interested in.

Also, feel free to take a look at our projects categorized by Subjects.

Easy Projects

Our easiest set of original projects. These can be completed by anyone with an elementary school education, and they generally take less time and effort than our more advanced projects. However, we think they're still pretty cool, and we've included a few ideas to extend the scale of each project to make it more engaging for you.

Bag Strength
In this project, you can find out how much a bag can hold, so you can impress people next time you go to the grocery store.
Related fields: Physics (Statics)
Battery Testing
Which brand of batteries will let your CD player run the longest?
Related fields: Physics (Electronics)
Bending Light
How can we manipulate the light?
This is not a full project guide, but provides multiple ideas.
Related fields: Physics (Optics)
Bouncing High
Predict how high a ball will bounce.
Related fields: Mathematics (Analysis)
Cube Folding
Which arrangements of six squares can be folded into a cube?
Related fields: Mathematics (Geometry)
Food and your Heart
What food makes your heart race?
This is not a full project guide, but provides multiple ideas.
Related fields: Biochemistry
Interrogation
Check out this statistical experiment to test how phrasing questions might affect the answers.
Related fields: Behavioral Sciences
M&M Packing
Ever wonder how much candy you can fit in a Halloween bag, or a lunch box? Find out with this experiment.
Related fields: Mathematics (Geometry)
Observing Fish
How can we understand them better?
This is not a full project guide, but provides multiple ideas.
Related fields: Zoology
Paper Airplane Experiment
See which paper airplane designs are the best.
Related fields: Mathematics (Geometry), Physics (Dynamics)
Polygon Analysis
Analyze polygons and determine some interesting properties
Related fields: Mathematics (Analysis)
Rate of Filtration
How does thickness of a medium affect the rate of filtration?
Related fields: Math/Chemistry
Shapes and Patterns
See if you can find mathematical relationships between shapes and patterns
Related fields: Mathematics (Geometry)

Medium Projects

Slightly more difficult (and hopefully, more impressive!) than the "Easy" projects, either conceptually or based on the amount of work required. None of these projects should be out of reach of any high-school students, although some independent research may be necessary.

Balloons and Charles' Law
This poorly-named project investigates the reason that balloons expand and contract in different temperatures.
Related fields: Physics (Thermodynamics)
Balloon C-Strength
Can a balloon be punctured 10 times and not pop?.
Related fields: Physics/Chemistry
Chemistry and Laundry
Explore how different kinds of chemicals take out stains on clothing and their effect on the clothing.
Related fields: Chemistry
Crystallization
How are sugar crystals made?
Related fields: Chemistry
Fingerprint Detection
How to detect fingerprints using iodine vapor?
Related fields: Chemistry
Flipping Coins
Use this experiment to see what the probability is of landing a coin on its edge.
Related fields: Mathematics (Statistics)
The Invisible Ink
Write in invisible ink then visualize it.
Related fields: Chemistry
JPEG - GIF Conversion
Today there are many methods for compressing digital images; in this project you'll get to examine two of the most popular formats.
Related fields: Computer Science (Graphics)
Light Pollution
What else is polluting our night sky?
This is not a full project guide, but provides multiple ideas.
Related fields: Environmental Science
Liquid Cooling
How fast do some liquids cool compared to others? Find out inside.
Related fields: Physics (Thermodynamics)
Physics and the Tower of Pisa
How is it that the Leaning Tower of Pisa has not yet fallen over? This experiment may help you find out.
Related fields: Physics (Statics)
Pineapples and Enzymes
What effect do the enyzmes in pineapples have on Jell-O?
Related fields: Biology (Microbiology)
Plant and Animal Cell Tonicity
Investigate the effects of osmosis and tonicity in plant and animal cells
Related fields: Biology (Microbiology)
Plant Growth
What effect do light and amount of water have on the rate of growth for a plant?
Related fields: Biology (Botany)
Playing with Forces
There are so many forces around us! So why don't we get to know them and play with them.
This is not a full project guide, but provides multiple ideas.
Related fields: Physics
Properties of Pendulums
Explore the properties of pendulums and what factors influence its motion.
Related fields: Physics
Riemann Integrals
So you've seen plenty of curves in your algebra class. Ever curious if there was more to the curve than just a bent line?
Related fields: Mathematics (Analysis)
Taste and Smell
Learn about the link between taste and smell
Related fields: Biology (Physiology)
The Fire-Proof Cup
Fill a paper cup with water or other liquids to make it non-flammable.
Related fields: Chemistry
The Science of Earthquakes
What causes this devastating natural disaster?
This is not a full project guide, but provides multiple ideas.
Related fields: Earth Science

Challenging Projects

These projects require significant amount of research and time. Don't worry, all are possible at the high school level. Please don't let the difficulty rating scare you - we think that these projects are more likely to "wow" the judges.

Coin Game
Find out whether a simple game is rigged or not! Try to cheat your friends!
Related fields: Mathematics (Game Theory)
Conductors, Semiconductors, Insulators, and Superconductors
Let's investigate more about the materials that enabled us to have computers and other wonderful electronics.
This is not a full project guide, but provides multiple ideas.
Related fields: Materials Science
Galileo's Gravity Experiment
Repeat the experiment that Galileo used to measure the acceleration of gravity.
Related fields: Physics (Kinematics)
Lights and Sounds of Logic
How to implement logic operations using simple circuitry that produces light and sound.
Related fields: Mathematics (Logic)/Physics (Electronics)
Measuring Characteristics of Planets
You don't need to take a ruler to space to know how far and big planets are!
This is not a full project guide, but provides multiple ideas.
Related fields: Physics (AstroPhysics)
Platonic Solids
Investigate the five platonic solids.
Related fields: Mathematics (Geometry)
Randomization
Is it really possible to make something really random?
This is not a full project guide, but provides multiple ideas.
Related fields: Mathematics
Tic Tac Toe Analysis
Study the game of tic-tac-toe and try to develop an optimal strategy.
Related fields: Mathematics (Game Theory)
Winning Strategy
Play a simple counting game and develop a winning strategy.
Related fields: Mathematics (Game Theory)