Free science fair project idea that examines the differences between cats and dogs. Analyze objective qualities rather than subjective ones.

Demonstrate the relationship between mass, volume and density. Measure displaced water, and weigh object to calculate mass and density.

In this science fair experiment, students learn about the scientific principles behind Doppler ultrasound.

Which music genres have the fastest tempos? The slowest? This experiment determines if there's a relationship between beats per minute in a song and its genre.

Science fair project that determines the relationship between the temperature and the rate of cricket chirping. How many times do crickets chirp each minute?

Check out this fun science project idea to get a better understanding of unstable isotopes and the process of radioactive decay of isotopes through modeling.

In this math and science activity, help your middleschooler learn about proportion and measurement with just her shadow and a tape measure!

Devise list of randomly chosen words, test how many words volunteers can remember. Compare results of adults and children. Which have better memories?

Science fair project that compares tap water and bottled water for the presence of common impurities.

Place mushroom caps on poster board, label samples. Check beneath mushroom caps for "prints" of spores. Record and interpret prints left behind.

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

This science fair project idea provide quantitative data about how well the use of ASL ( American Sign Language) works in communicating with babies.

Science fair project that examines the biodiversity of ant populations in various locations.

Science fair project which determines whether it is numerically possible to be connected to every person on the earth within six degrees of separation.

This science fair project idea explores the fastest average speed a human can talk.

Investigate the advantages of the use of ceramics in engines such as the tiles used in Space Shuttle. Use iron filings and magnets.

This science fair project evaluates the suggestibility of males versus females in copying the actions of those around them.

Believe it or not, the common spud has enough electrochemical energy to power a small digital clock.

This project compares the strength of one, two, and three-ply toilet paper.

Science fair project which determines whether a person's taste in music is dictated by the key that the song is written in.

This science fair project idea examines whether music has an effect on a person's ability to complete a simple task that requires concentration.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

In this activity, your child will make her own "quicksand" to better understand how a substance can be both fluid and solid at the same time.

Help your kindergarten scientist discover relative size, density, and buoyancy with this fun, pumpkin science project!

This science fair project idea investigates the relationship between memory and age.

This science fair project idea investigates how different disinfectants work in killing germs.

This project concerns activity happening millions of miles away, on the sun.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.