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Is cleaning with lemon effective? Get ready to give this science project some elbow grease and find out if acidic lemons can be used as a cleaning agent.

This science fair project uses paper chromatography to investigate whether black, brown, orange, and purple are pure colors or mixtures of other colors.

In this experiment, students find out what happens when a less-dense fluid interacts with a denser one, replicating the effect of cooler solid rock on magma.

In this experiment you explore how tectonic plates move to create land and expand bodies of water.

Observe how your brain works while it is focused on one thing, and how it works while you are distracted by another thing.

Do you love to make Jell-O? Find out in this science fair project idea if it is possible to make Jell-O with just warm water.

This cool and easy elementary school science fair project idea provides the basic information on the use of our senses to experience the world about us.

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

Take a dive into the candy jar with this yummy science experiment.

This science fair project idea experiments with spinning color wheels and optical illusions.

Construct and experiment with a periscope using reflected light rays to gather an image.

Science fair project that determines whether tapping a pomegranate with a spoon helps it release its seeds.

Does dough rise faster with unbleached or bleached flour? Investigate in this science fair project idea.

This science fair project idea demonstrates that light travels in straight lines and experiments with reflecting light.

Learn how to demagnetize a magnet and how physics can explain this phenomenon with this enlightening science fair project.

How would you dry your wet clothes if your dryer didn't work? Find out with this fun experiment!

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

In this fun science project, learn about what happens to cut fruit and experiment with how to stop apples from turning brown.

Discover how to make fake snot with this cool science fair project idea to learn about polymers, enzymes, and more.

This science project lets students explore the number of spots on a ladybird and how to treat ladybugs with respect.

In this simple science project, learn about what causes dew and what affects dew formation with a drinking glass, ice, and a soda bottle.

Want to see a great example of Newton's first law? Kids will learn about basic physics with this fun, ballistic experiment.

What's the relationship between temperature, air humidity and static electricity? Kids will find out with this free static electricity science fair project.

Students will investigate the thermal conductivity of metals by learning how to measure thermal conductivity with this fun and easy science fair project idea.

In this cool science fair project idea, kids conduct the ruler drop test on volunteers to determine whether reaction time can be improved with practice.

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

With this science fair idea, little scientists will gain valuable insights into the physics behind throwing a baseball.

In this fun science fair project idea, kids will experiment with various methods in order to discover the fastest way to cool a soda.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

Does the temperature of a magnet affect its strength? Learn about the relationship between magnets and temperature with this cool physics science fair project.