What is the coldest temperature possible? In this cool experiment, you'll calculate absolute zero by extrapolating data on the temperature and volume of gas.

Score a bull's eye with this cool science fair project on horizontal projectile motion. Guide a marble to its target and predict its trajectory using math!

This project determines the age of a tree using a growth factor chart instead of cutting the tree down to count the rings in its base.

Find out whether pacing in long-distance running actually acquires for drastic changes in finishing times versus running super-fast at the start.

Kids will enjoy this cool demonstration of Newton's Third Law and the conservation of linear momentum.

Get this cool science fair idea to explore how arctic tundra animals change their behavior and adapt to survive in long, cold winters.

The projects describes the correlation between Gravel Run and Centreville Landing in terms of pH, dissolved oxygen, turbidity, and temperature.

Use applied math to model orbital eccentricity in this cool science fair project for 7th grade.

Do people only "hear" what they want to hear? Explore pareidolia and psychoacoustics with this easy science fair project that pits melody against white noise.

What kind of fabric holds dye best? How can you improve a dyed fabric's colorfastness? In this colorful project, test colorfastness using mordants and bleach.

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.

In this "paper and pen" science fair experiment, students will research the difference between standard time and astronomical mean time.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

Find the North Star, and measure your latitude! The purpose of this science fair project is to find latitude and learn about geographic locations.

The objective of this science fair project idea is to examine light refraction as it passes through liquid crystals.

In this science experiment, observe convection currents forming and learn about how heat energy moves in liquids from hot to cooler areas through convection.

A cool physics science fair project idea for 7th grade exploring the application of distance, velocity, and time equations.

Is the birthday paradox really a paradox, or just an intriguing problem that defies intuition? Find out with this birthday paradox science fair project.

Science fair project that tests the correlation between outdoor temperature or weather conditions and the number of visible stars at night.

Determine the relationship between the speed of a sound and the temperature of the air it passes through.

This science fair project investigates why the number of visible stars changes from place to place.

Prove that the Earth is not flat. The objective of this science fair project is to measure the angle of the sun and calculate the circumference of the Earth.

This project explores whether similar type movie scenes are accompanied by music with similar characteristics.

Science fair project which measures the amount of heat energy released by a burning candle by calculating how many calories of heat it emits.

Science fair project idea that measures fuel efficiency in cars. Calculate cost per mile by comparing fuel cost and consumption data.

This science fair project idea observes products available in the school cafeteria and waste produced by these products.

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

Learn about how we localize objects and beings in space through sound and about monaural auditory mechanisms and binaural auditory mechanisms.

This project explores whether the tempo of the background music we hear in a businesses is important to the environment and how customers move.

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