This science fair project idea focuses on the use a conductivity device to determine the ionic concentrations of hard water.

This science fair project idea compares the cuteness reaction between genders.

This science fair experiment examines the relationship between gender, age, and smiling.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

Learn how acid-base catalysis affects enzymes and enzymatic reactions in this science project.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

Examine the effect of pressure on carbonation in soda.

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

When you cut a flower to put into a vase, it'll eventually wilt, even with water and sunshine. But is there another scientific secret to keeping flowers fresh?

What do ants eat? Kids find out by observing a colony of ants in this cool zoology science fair project for 4th grade.

This project explores the interaction between air pressure and playing surface in determining a basketballâs bounce.

The objective of this science fair project is to explore whether superabsorbent polymer or hyrdrogel crystals have the best waterabsorbency.

This experiment explores whether reading text on a computer screen or type on paper leads to better retention of the information read.

In this science fair project, students will use four different household objects to see which ones form the most or best crystals.

Kids discover what a homogeneous mixture is by adding sugar to distilled water and identify the various factors affecting solubility.

This free science fair project explores the "dirty" relationship between the presence of organic material in soil and water absorbency.

Science fair project that demonstrates the effect of detergent pollution on fresh water birds' ability to stay afloat.

The objective of this science fair project is to investigate salt water density.

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

The objective of this science fair project is to determine whether there are gender differences when boys and girls view optical illusions.

Determine if each hemisphere specializes in dealing with specific functions. Include illustrations of the brain, it hemispheres.

This science fair project demonstrates the magic of arches by challenging students to stack telephone books on top of eggs without breaking them.

Determine how salinity affects the circulation of warm and cold water. Note whether the warm water mixes or forms a layer with cold water.

This project investigates several commercially decaffeinated tea types (black, green, oolong, white) for the presence of detectable traces of caffeine.

This science fair project determines how age affects the speed that someone can change the focus of their eyes between near and far sightedness.

Determine which seeds are most likely to survive harsh winter conditions (low temperatures).

Science fair project that examines oxidation, reduction and chemical indicators by testing for the presence of the iodide in salt.

Explore the negative and positive consequences of stereotypes.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

Study the anatomy of the brain and the functions of the corpus callosum. Research split brain surgery and its impact on advances in neuroscience.