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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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1,618 results
1,618 results
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Turning Compost
Science project
Turning Compost
Science fair project that helps you create your own compost pile in order to test the efficiency of different methods of composting.
Science
Science project
Which Fruit Has the Most Vitamin C?
Science project
Which Fruit Has the Most Vitamin C?
Figure out which fruit has the most vitamin C (ascorbic acid) in this fun science project!
Science
Science project
Decaying Food
Science project
Decaying Food
Science
Science project
Hot Ice Science Fair Project
Science project
Hot Ice Science Fair Project
Science
Science project
Melting Ice
Science project
Melting Ice
Science
Science project
Recycled or New
Science project
Recycled or New
Science
Science project
Saving Hot Water
Science project
Saving Hot Water
Science
Science project
Sun or Shade
Science project
Sun or Shade
Science
Science project
Windy Weather II: The Correlation Between Barometric Pressure and Wind Velocity
Science project
Windy Weather II: The Correlation Between Barometric Pressure and Wind Velocity
This science project researches the correlation between barometric pressure and wind velocity.
Science
Science project
Comparing Different Methods of Assessing Turbidity
Science project
Comparing Different Methods of Assessing Turbidity
The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.
Science
Science project
Counting Air Particulate Matter
Science project
Counting Air Particulate Matter
Is there more air particulate matter in an urban or rural environment? Test your knowledge with this science fair project.
Science
Science project
Queenstown Creek: Land Use Vs. Water Quality
Science project
Queenstown Creek: Land Use Vs. Water Quality
This project researches whether the type of land use affects the water quality of Queenstown Creek.
Science
Science project
What Affects the Appearance of Afterimages?
Science project
What Affects the Appearance of Afterimages?
This project is about after-images and what possibly affects them.
Social studies
Science project
Light Intensity and Distance
Science project
Light Intensity and Distance
In this physics project, learn about the relationship between light intensity and distance using a laser pointer, flashlight, and graph paper!
3rd grade
Science
Science project
Effect of Food On Mosquito Growth
Science project
Effect of Food On Mosquito Growth
This experiment researches if you gave different amounts of food to mosquito larvae would they grow faster or slower
Science
Science project
Horseshoe Crab Density
Science project
Horseshoe Crab Density
This project studies how density maximizes the growth of juvenile limulus polyphemus (Horseshoe Crabs)
Science
Science project
Fruit Battery
Science project
Fruit Battery
Construct batteries that make electricity from fruits with this fun science fair project.
5th grade
Science
Science project
Reservoir Capacity of Igneous, Sedimentary, and Metamorphic Rocks
Science project
Reservoir Capacity of Igneous, Sedimentary, and Metamorphic Rocks
Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.
5th grade
Science
Science project
Which Type of Sunglass Lenses Gives the Best Sun Protection?
Science project
Which Type of Sunglass Lenses Gives the Best Sun Protection?
Which type of sunglass lenses gives you the best protection from the sun's harmful UV rays? Find out in this cool science project!
Science
Science project
What Is the Most Effective Sunscreen?
Science project
What Is the Most Effective Sunscreen?
Which sunscreen is most effective at blocking the sun's harmful UV rays? Test the SPF of various sunblock brands in this cool science project!
Science
Science project
Making Sugar Crystals
Science project
Making Sugar Crystals
Kids will love making sugar crystals in this sugar crystal science fair project which teaches important chemistry concepts like saturation and solubility.
5th grade
Science
Science project
Way To Glow
Science project
Way To Glow
Students will investigate the illumination durations and intensities of different luminous substances of different colors of the spectrum.
Science
Science project
What is the Shelf Life of Natural or Processed Vitamin C?
Science project
What is the Shelf Life of Natural or Processed Vitamin C?
The objective of this science fair project is to examine the rate of vitamin C degradation in natural and processed orange juices.
Science
Science project
Can Yeast Ferment Polysaccharides as Efficiently as Disaccharides?
Science project
Can Yeast Ferment Polysaccharides as Efficiently as Disaccharides?
The objective of this science fair project is the compare the rate and efficiency of disaccharide and polysaccharide fermentation by yeast.
Science
Science project
Do Phases of the Moon Affect Circadian Patterns in Mammals?
Science project
Do Phases of the Moon Affect Circadian Patterns in Mammals?
The objective of this free science fair project is to examine the way in which the phases of the moon affect circadian patterns in mammals.
Science
Science project

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