Science Fair Projects

Science Fair Project Guides

Complete project guides with hypotheses, materials lists, step-by-step instructions, and presentation tips.

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Showing 20 projects

Building a Simple Electric Motor
physicshard

Building a Simple Electric Motor

This project involves building one of the simplest types of electric motors, a homopolar motor. By creating a circuit with a battery, a magnet, and a conductive screw, you can demonstrate how electrical energy is converted into mechanical motion.

2 days·high
Building a Solar Oven to Cook S'mores
physicsmedium

Building a Solar Oven to Cook S'mores

In this project, you will design and build a functional solar oven using a cardboard box, aluminum foil, and plastic wrap. You will then test your oven by using it to melt chocolate and marshmallows for s'mores, demonstrating the conversion of light energy to heat energy.

2 days·middle
Cleaning Pennies: A Chemical Reaction Experiment
chemistryeasy

Cleaning Pennies: A Chemical Reaction Experiment

This project tests the effectiveness of different acidic solutions (like lemon juice, vinegar, and ketchup) in cleaning the tarnish off of old pennies. It's a quick and satisfying experiment that demonstrates a real-world chemical reaction.

1 days·elementary
Creating a Tornado in a Bottle
earth scienceeasy

Creating a Tornado in a Bottle

This experiment demonstrates how a vortex, similar to a tornado, is formed when water drains from one bottle to another. By swirling the bottle, you create a whirlpool that allows air and water to flow past each other, creating a mini-tornado.

1 days·elementary
DIY Water Filter: From Dirty to Clean
earth sciencemedium

DIY Water Filter: From Dirty to Clean

In this project, you will construct a multi-layer water filter using materials like sand, gravel, and charcoal to purify muddy water. It's a practical demonstration of how natural filtration processes work to clean our water sources.

2 days·middle
Extracting DNA from a Strawberry: A Kitchen Science Experiment
biologymedium

Extracting DNA from a Strawberry: A Kitchen Science Experiment

This experiment provides a step-by-step guide to isolating and viewing the DNA of a strawberry. Using simple materials like soap, salt, and rubbing alcohol, you can precipitate the DNA and see the stringy, white substance that makes up the genetic code.

1 days·middle
Growing Sparkling Salt Crystals
chemistryeasy

Growing Sparkling Salt Crystals

This project guides you through the process of growing salt crystals from a supersaturated salt solution. It's a visually rewarding experiment that demonstrates how molecules arrange themselves into ordered, repeating patterns.

7 days·elementary
Homemade Volcano: A Chemical Reaction Eruption
chemistryeasy

Homemade Volcano: A Chemical Reaction Eruption

This project demonstrates a basic acid-base chemical reaction by building a model volcano that erupts with 'lava' made from baking soda and vinegar. It's a visually exciting and highly engaging experiment for all ages.

1 days·elementary
Modeling the Solar System to Scale
earth sciencemedium

Modeling the Solar System to Scale

This project involves creating a scale model of the solar system, focusing on either the relative sizes of the planets or the distances between them. It's a challenging but rewarding way to grasp the immense scale of our cosmic neighborhood.

5 days·middle
Moldy Bread: A Study in Fungi Growth
biologyeasy

Moldy Bread: A Study in Fungi Growth

This project explores what factors, such as light, moisture, and temperature, affect the growth of mold on bread. By placing slices of bread in different environments, you can observe and compare how quickly and extensively mold develops.

10 days·elementary
Rock Candy: Growing Edible Crystals
earth scienceeasy

Rock Candy: Growing Edible Crystals

This experiment guides you through the process of making rock candy by growing large sugar crystals from a solution. It's a fun, edible project that demonstrates the same principles of crystallization that form minerals and rocks in the Earth's crust.

10 days·elementary
Testing the Acidity of Drinks with Red Cabbage
chemistrymedium

Testing the Acidity of Drinks with Red Cabbage

This project teaches you how to create a natural pH indicator by boiling red cabbage. You will then use this indicator to test the pH levels of various household liquids, which will change color depending on whether they are acidic, neutral, or basic.

1 days·middle
The 5-Second Rule: Fact or Fiction?
biologyhard

The 5-Second Rule: Fact or Fiction?

This experiment scientifically tests the validity of the '5-second rule.' By dropping food onto a surface for different lengths of time and then culturing the bacteria transferred to the food, you can visually determine if time makes a difference in contamination.

7 days·high
The Effect of Light Color on Plant Growth
biologyeasy

The Effect of Light Color on Plant Growth

This experiment investigates how different colors of light (red, blue, green, and white) impact the growth of bean plants. It's a great visual project to understand the basics of photosynthesis and light absorption.

14 days·elementary
The Effect of Music on Plant Growth
biologymedium

The Effect of Music on Plant Growth

This experiment tests the popular belief that talking or playing music to plants can help them grow. By exposing groups of plants to different types of music (or silence), you can measure and compare their growth over several weeks.

21 days·middle
The Effect of Temperature on Liquid Viscosity
chemistryhard

The Effect of Temperature on Liquid Viscosity

This experiment measures how quickly a marble falls through different liquids at various temperatures. By timing the marble's descent, you can calculate a relative measure of viscosity and determine how it changes when the liquids are heated or cooled.

2 days·high
The Greenhouse Effect in a Jar
earth scienceeasy

The Greenhouse Effect in a Jar

This experiment uses two glass jars—one covered and one open—to demonstrate how greenhouse gases trap heat in the Earth's atmosphere. By measuring the temperature change in both jars when placed in sunlight, you can see the greenhouse effect in action.

1 days·elementary
The Physics of a Pendulum
physicshard

The Physics of a Pendulum

This project explores the physics of a simple pendulum by systematically testing how its period (the time for one full swing) is affected by its length, mass, and amplitude. It's a precise experiment that demonstrates fundamental principles of physics.

3 days·high
The Physics of a Trebuchet: Launching for Distance
physicshard

The Physics of a Trebuchet: Launching for Distance

This project involves constructing a small-scale trebuchet, a type of medieval siege engine. You will then experiment with variables like the counterweight mass and projectile mass to see how they affect the launch distance of a projectile, exploring concepts of potential and kinetic energy.

10 days·high
The Unbreakable Egg: An Egg Drop Challenge
physicsmedium

The Unbreakable Egg: An Egg Drop Challenge

The goal of this project is to design and build a contraption that will prevent a raw egg from breaking when dropped from a significant height. It's a hands-on engineering challenge that teaches important physics principles.

3 days·middle

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