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

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.

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

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

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 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 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.

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

In this project, vinegar and salt act as preservatives keeping bacteria from growing in the bouillon mixtures.

The purpose of this science project is to determine which stimulus, gravity or water, will cause the greatest growth response in a plant.

The goal of this science fair project is to demonstrate magnetic forces of attraction and repulsion using a magnet and everyday objects.

In this science fair project on the relationship between distance and time, kids explore the behavior of gravitational acceleration through direct observation.

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

Which battery lasts the longest? In this science fair project, kids will test popular brand name batteries like Duracell and Energizer against generic brands.

Determine if picking up fallen food in 5 seconds or less prevents the transfer of bacteria from the ground.

The goal of this science fair project is to determine which cheese grows mold the fastest: Vermont Cheddar, American, Brie, or Camembert?

In this science project, learn about soil porosity and measure the percent porosity of sand, silt, and clay.

How does frost form? How fast does it form? Do this simple science project using a plastic glass, rock salt and some water to learn about deposition.

This cool electricity project teaches kids how connecting batteries in series vs. parallel circuits can contribute to different levels of voltage and amperage.

What causes the seasons to change? Kids find out by modeling the earth's tilt using a globe, flashlight and graph paper in this cool science fair project idea.

The objective of this science project is to determine the relationship between carbon dioxide gas and the temperature of the atmosphere.

Evaluate the ability of a biodegradable dish detergent to increase the penetration of water in hydrophobic soils.