Kids learn about Brownian motion, diffusion, and how temperature is a key factor affecting the rate of diffusion in this cool science project.

Is there a relationship between caffeine and heart rate? Students will determine the effect of caffeine on heart rate in this fun science fair project.

see whether all liquids evaporate at the same rate. In other words, does water evaporate at the same rate as juice?

In this science fair project, students examine how the flow rate in a stream affects the growth of aquatic plants.

This experiment investigates the relationship between the temperature of a candle and its burn rate.

This science fair project idea determines if a particular chemical has an effect (increase or decrease) on the heart rate of Daphnia.

The objective of this science fair project is to test the growth rate of a plan in a crystal medium in comparison to traditional soil.

The objective of this science fair project is the compare the rate and efficiency of disaccharide and polysaccharide fermentation by yeast.

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

This science fair project idea explores how far the âdanger zoneâ is from different types of caution signs.

Science fair project that examines the relationship between fluid flow rate, pressure, and resistance.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

Do you think heat can affect a plant's growth rate?

This experiment evaluates how a diet that is rich in "mood-enhancing" foods affects the way people feel over several weeks.

This science fair project idea explores how length affects the weight a bridge can hold.

Check out this fun science fair project idea to determine if the size of a particle affect the rate or speed of a chemical reaction.

Experiment with the wonders of pressure and condensation by crushing a soda can with nothing but air and water!

Tin can phones offer something modern versions don't—a fun project to make with a friend, and a dramatic illustration of vibration and sound waves.

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

Test for a correlation between perceived color and heart rate. Using a stethoscope and stop watch, measure the heart rate (beats per minute) of volunteers.

This science fair project idea investigates whether body language and heart rate can decipher who's lying and who's not.

Determine which metal has the highest rate of conductivity.

Test whether spot magnets can help improve the symptoms of an injury.

The objective of this science fair project is to determine the rate at which participants can respond to different patterns.

This science fair project idea explores whether white light can be separated into different colors.

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

This science experiment tests if dog saliva can really help heal wounds.

This science fair project idea explores how far the average human can see.

Determine which video game elevates the heart rate best and burns the most calories.