A math project teaches students to use a clinometer to gauge the height of very tall objects like trees & to think of better ways to measure how high they are.

In this science fair project, learn how a mineral streak is made and how it can help identify an unknown mineral.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

Crayons aren't just good for creating colorful masterpieces -- they're also great for science!

Ant behavior is closely related to light intensity. This free science fair project idea examines how fast ants dig when they are exposed to to light and dark.

Design and build a scale model representing living tree architecture. Then build a full-size version using one or more lives trees, and test your creation.

This project involves the programming and development of a 3D Rubik's Cube application using C++.

This experiment examines whether storing your orange juice at different temperatures affects its acidity.

This science fair project idea examines the distance a person travels on an average day and to relate that to an understanding of the size of the Earth.

This science fair project idea examines if there is a reason that musical notes are at the pitches they are.

Learn the basic structure of a DNA strand, which is the double helix, how genes form together, and the resemblance DNA has to a twisted ladder. Create a model.

The purpose of this science fair project is to study the properties of sugar and examine individual preferences for sugar and other sweeteners.

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

This science fair project idea studies the acidity of rain water and whether the acidity is the same on all rainy days or does it fluctuate.

Analytical chemists perform chromatography to separate colors into pigments. Test the food coloring used in M&M's and Skittles candy in this fun project!

Does putting soapy water on plants help or hinder plant growth? Kids learn about greywater and how it affects plant growth in this cool science fair project.

This project examines whether people's taste perception is influenced by what they see.

Students will investigate the illumination durations and intensities of different luminous substances of different colors of the spectrum.

The purpose of this science fair project is to explore whether UV light passes through some colors and not others by looking at blue, red, purple, and clear.

This science fair project idea explores if an LED light can be powered by vegetables and/or fruits.

Measure the effectiveness of detergent containing a UV-absorbing compound in blocking UV-A radiation. Use black light and UV detecting beads.

What colors can dogs see? Do they only have black and white vision, or can they see other colors too? Find out in this cool science experiment!

In this science fair project, students examine how temperature affects sugar transport within a plant.

In this experiment you simulate radioactive decay in order to gain an understanding of the basics of half-life.

This science fair project explores discover whether the acidity of sour candy is comparable to that of battery acid.

Evaluate gender differences in processing visual information.

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.