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This science fair project idea determines if crystals will absorb food dye and if colors will mix by the process of diffusion.

Demonstrate and describe acid-base reactions of baking soda and baking powder by making pancakes.

In this microwave plant experiment, find out whether microwave radiation will affect radish seed germination. Will it help or hinder the plants' growth?

In this science fair experiment about recycling, demonstrate how the wax from a candle can be reused to make another candle.

Learn about the anatomy of the autonomic nervous system and its relationship to the rest of the body.

Learn how to make an anemometer with step-by-step instructions in this cool science fair project idea for 4th grade.

This science fair project evaluates which sense produces the fastest response time: hearing, touching, smelling or seeing.

This science fair project idea demonstrates how our fingers prune when in water.

The objective of this science project is to examine the factors that affect the dispersion of oil in water, including water agitation.

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

Kids learn how fiber optics work with a dramatic total internal reflection experiment using a fish tank, water, and a laser pointer.

In this fun science fair project idea learn the difference between additive and subtractive color and why they are handled differently.

The objective of this science fair project is to examine the cleanliness of salad preparation techniques.

This science fair project focuses on the use of the enzyme amylase found in human saliva to break down starch into sugar.

Is exercise a cellular activity? Check out this fun science fair project idea to compare the carbon dioxide production before and after exercise.

In this project students experiment with making music using only glasses of water.

This science project has students study a group of volunteer liars actively lying to study the behavior of a lie. Students see if they can figure out the truth.

Learn about where colors come from and how light absorption works in this fun experiment! All you need is a flashlight, construction paper, and cellophane!

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

Research fruits and their ripening stages, follow and document the different stages. Analyze what causes fruit to continue ripening after being picked.

How fast does light travel in different mediums? Kids conduct a cool refraction experiment in materials like water and air for this science fair project.

This experiment investigates whether the psychological phenomenon of the halo effect can be used to explain people's perceptions of others.

Make sourdough bread...and learn some colonial history and modern science in the process!

This project explores the effectiveness of various common household ingredients in cleaning tarnished and oxidized coins.

Kids will make a beautiful rainbow in a jar and learn what enables different types of liquids to remain distinct in separate layers.

In this experiment, students will create their own version of coquina, a sedimentary rock thatâs formed by seashells and sand, cemented by seawater minerals.