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Science Fair Project Ideas

Education.com has assembled a vast collection of science fair project ideas written by science teachers, professional scientists, and educational consultants on popular science fair topics ranging from physics and chemistry to biology and even sociology. We offer free science fair ideas suitable for every grade level, be it preschool, kindergarten, elementary school, middle school, or high school. Check the boxes in the sidebar to filter your results, or use the search bar to find that perfect science fair project or experiment your child will be sure to love.

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1,594 results
1,594 results
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What Lives in the Air Conditioner?
Science project
What Lives in the Air Conditioner?
In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.
5th grade
Science
Science project
What is the Bacterial Content of Milk?
Science project
What is the Bacterial Content of Milk?
In this science fair project, students will use methylene blue to study the presence of aerobic bacteria in milk.
Science
Science project
Determining the Empirical Formula of Potassium Chlorate through Thermal Decomposition
Science project
Determining the Empirical Formula of Potassium Chlorate through Thermal Decomposition
In this science fair project, students will learn how to calculate the formula for the thermal decomposition of potassium chlorate.
High school
Science
Science project
Exploring Erosion, Sediments and Jetties
Science project
Exploring Erosion, Sediments and Jetties
In this science fair project, students will create a model of a shoreline, observe erosion and examine how jetties prevent erosion.
4th grade
Science
Science project
Comparing Spices, Salt and Dehydration in Food Preservation
Science project
Comparing Spices, Salt and Dehydration in Food Preservation
This science project involves comparing the relative effectiveness of salt, pepper and dehydration in food preservation.
Science
Science project
Do Some Liquids Expand More than Others When Frozen?
Science project
Do Some Liquids Expand More than Others When Frozen?
In this science fair project, kids observe the expansion of liquids when frozen and determine if some liquids expand more than others in the freezing process.
Kindergarten
Science
Science project
Exploring Static Electricity with Sticky Balloons
Science project
Exploring Static Electricity with Sticky Balloons
This science fair project introduces children to static electricity and the idea that electricity is more than lights and plugs.
Kindergarten
Science
Science project
Text on Screen vs. Type on Paper: Which is Easier to Remember?
Science project
Text on Screen vs. Type on Paper: Which is Easier to Remember?
This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.
4th grade
Science
Science project
Whole and Parts: Taking Things Apart
Science project
Whole and Parts: Taking Things Apart
This project leads to an understanding that a whole may be built of smaller parts that fit and work together and provides an introduction to basic tools.
Kindergarten
Science
Science project
Does Singing Help Us Retain Information?
Science project
Does Singing Help Us Retain Information?
Throughout history, people have used song as a teaching and memory tool. This project explores whether song improves a person's ability to retain information.
4th grade
Science
Science project
Eureka! Volume and the Displacement of Water
Science project
Eureka! Volume and the Displacement of Water
This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.
Kindergarten
Science
Science project
What is the Best Way to Disinfect a Toothbrush?
Science project
What is the Best Way to Disinfect a Toothbrush?
This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.
Science
Science project
Is it Better to Eat a Large Meal Before or After a Test?
Science project
Is it Better to Eat a Large Meal Before or After a Test?
This science fair project evaluates if and how eating a large meal affects ability to perform mental tasks.
Science
Science project
Does Family Size Affect Self-Worth?
Science project
Does Family Size Affect Self-Worth?
This experiment uses Rosenberg's Self Esteem Scale to evaluate if there is a correlation between family size and self esteem.
Science
Science project
Men Versus Women: Who is More Afraid?
Science project
Men Versus Women: Who is More Afraid?
Does fear cause the same physiologic responses in men and women? This experiment measures people's blood pressure and heart rate while watching a scary movie.
Science
Science project
Descriptive Reduction Exercise
Science project
Descriptive Reduction Exercise
This interactive project invites science fair-goers to participate in examination and recording to demonstrate the importance of firsthand observation.
Social studies
Science project
The Speed of Sound on a String
Science project
The Speed of Sound on a String
This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.
Kindergarten
Science
Science project
Density Experiment
Science project
Density Experiment
This is a quick, easy science fair project that conveys the idea of density to preschool and early elementary children.
Kindergarten
Science
Science project
Leaf Rubbings: Shapes and Patterns
Science project
Leaf Rubbings: Shapes and Patterns
In this project combining nature, art, math, and science, children make rubbings of leaves then observe shapes and structures and sort the leaf images.
Kindergarten
Science
Science project
How Do Movies Influence Your Appetite?
Science project
How Do Movies Influence Your Appetite?
This science project investigates the influence of different genres of movies on appetite.
Social studies
Science project
How Does Diet Affect Your pH?
Science project
How Does Diet Affect Your pH?
This high school science fair project investigates if small changes in your diet alter the pH of your saliva.
High school
Science
Science project
Personality Profile of the Social Media Junkie
Science project
Personality Profile of the Social Media Junkie
In this science fair project, students evaluate test subjects to determine if certain personality traits are more common in frequent users of social media.
High school
Social studies
Science project
Hydroponics vs. Soil: Which Is Faster?
Science project
Hydroponics vs. Soil: Which Is Faster?
In this science fair project, students determine whether a bean plant grows faster and taller using a traditional soil planting method or hydroponic method.
Science
Science project
How Sound Travels Through Air and Solids
Science project
How Sound Travels Through Air and Solids
This classic children's game demonstrates how sound travels through air vs. through a solid.
Kindergarten
Science
Science project
Can Food Boost Your Mood?
Science project
Can Food Boost Your Mood?
This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.
High school
Science
Science project

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