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This experiment will evaluate bacterial content on toothbrushes before and after different cleaning methods to determine which method of disinfecting is best.

This project examines the concentration of dissolved oxygen in water, with and without oil.

The goal of this science fair project is to evaluate the effect of heat on sound wave frequency.

Determine if certain colors of light are more effective for photosynthesis. Plant seeds in cardboard boxes with different light, record visible growth.

Determine which factors promote the greatest memory interference. Administer test, time how long it takes subjects to complete different tasks.

Is there any correlation between hot tubs and high blood pressure? Kids discover the answer (and its biological basis) in this cool science fair project.

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

Investigate the different ways in which objects and organisms can be classified, create your own. then have volunteers classify using their own systems.

Construct a model of radioactive decay. Learn more about radioactive decay by modeling the process using coin flips.

Study structure of the lens found in the human eye and determine whether it is concave or convex. Prepare a ray diagram, formulate hypothesis.

Formulate a hypothesis and use the scientific method to determine the guess what is hidden in a box. Test abilities of volunteers, without opening box.

The actual factors affecting friction may surprise you! Learn about the coefficient of friction and put some trigonometry into practice in this science project.

Easy and cool middle school science fair project on ripening process of fruits and measures you can take to prevent fruits from rotting and delay ripening.

This science fair project idea develops an understanding through experimentation of which shapes are the most structurally strong.

The purpose of this science fair project is to investigate whether cooking seeds before planting will speed up germination and growth.

The objective of this science fair project is to determine whether drawing with the right side or the left side of your brain will produce a better picture.

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

In this fun science fair project, make two different scale models of our solar system using Astronomical Units and planets' relative size!

Here is a fun middle school science project on factors affecting solubility. Learn how dissolved solids can "crash out" to form crystals when conditions change.

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

Determine which environment keeps an ice cube frozen for the longest duration. Inspect and record your observations when cubes melt.

Learn how to be a bird scientist in this simple project of watching feathered friends in their habitat.

Determine how different measurements of the same object might yield different values. Provide as many reasons that you can think of.

Here is a cool and easy science project to determine the rate of chlorophyll breaks down and how it affects the color change of grass from green to yellow.

Check out this cool middle school science fair project idea to determine if shopping carts are really carriers of harmful bacteria.

Before digital cameras, before Polaroids, there was the original pinhole camera. Build a pinhole camera and see what true vintage photography looks like!

2011 VIRTUAL SCIENCE FAIR ENTRY: The objective of this science fair project is to develop a microcontroller and circuit that can conduct electricity.

The objective of this experiment is to identify common materials that absorb sound waves with the greatest efficiency.

Here's a guide to starting a community clean-up project from scratch.

Science fair project that examines how yeast grows, and which conditions allow for optimal growth. What types of nutrients does yeast prefer?