Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

Save money by making compost! Use this science fair project idea to determine which composting methods best encourage decomposition of organic matter.

This project is about after-images and what possibly affects them.

Learn how to make a periscope with this cool engineering science fair project idea, and learn about optics to learn how a periscope works.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

This science fair project idea investigates if heat from direct sunlight is hotter than heat from reflected sunlight.

Learn how to relight a candle by lighting the vaporized wax in the smoke, and test how various kind of wax and candle brands relight differently.

Plants help keep a house cool! This article includes step-by-step instructions for completing this fun and interesting science experiment.

Does "short circuit" mean that electricity takes a short course? This science experiment provides steps to help you get to the bottom of this science mystery.

Learn the anatomical and physiological differences between central and peripheral visual systems.

What cause the phases of the moon? Make a model to see how the positions of the Sun, Moon, and Earth cause the crescent, gibbous, quarter, full, and new moon.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

The goal of this fun science experiment is to explore the limitations of sight and learn working of the human eyes.

Study structure of the lens found in the human eye and determine whether it is concave or convex. Prepare a ray diagram, formulate hypothesis.

This science fair project idea investigates how color affects temperature.

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

This science fair project idea determines which method of hand cleansing is the most effective.

This science fair project idea researches how your choice of clothing affect how hot or cool you feel during the day.

Do plants get crowded? Have your curious kid investigate how plants respond if they're forced to grow together in a confined space.

Check out this fun leaf chromatography science fair project idea for middle school students and discover the hidden pigments in leaves.

In this science project idea learn about working of different types of smoke detectors and find out which one is the most effective for you.

In this science fair project, kids will be able to see where germs reside on their hands while gaining insight into the benefits of thorough hand washing.

Explore the effect of wind speed on the burning rate of a candle.

This science fair project idea determines what household items are good conductors of electricity.

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

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!

This science fair project idea explores whether a person's ability to see under very dim lighting conditions diminishes with age.

Check out this fun science fair project idea to explore the process of diffusion in a cell and learn the difference between osmosis and diffusion.

Science fair project that creates fog using bottles of hot and cold water.