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

This science fair project investigates which of two learning modes most commonly used in school, visual and auditory, is better for information retention.

Determine whether a hot liquid cools off faster when liquid is added before or after a two minute wait.

In this science fair project, young children discover what happens when two fluids that have different densities get together.

This science project involves comparing the relative effectiveness of salt, pepper and dehydration in food preservation.

Determine whether cats have dominant paws. Observe which paw cat uses to reach for treats, feather, and string. Calculate percentage for two paws.

This project examines who can jump higher, boys or girls, younger people or older, and how these two factors, gender and age, interact with one another.

This science fair project idea determines an average personâs ability to use their anaerobic power system over a period of 2 weeks.

This science fair project determines which of two chemical agents can be used to release the drug (tea) from hydrogel crystals.

Learn about how we localize objects and beings in space through sound and about monaural auditory mechanisms and binaural auditory mechanisms.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

Your preschooler can learn how to siphon water with just two bottles and a plastic tube in this fun, educational science activity.

In this science fair project, high school students will try to determine the mathematical patterns in JS Bach's two movement preludes and fugues.

This classic children's game-connecting two cups with a string-demonstrates sound's ability to travel through air vs through a solid.

This science fair project idea compares the mass and density of objects.

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

Science fair project that compares the biodiversity of fungi in different ecosystems by identifying species of fungi.

Science fair project that helps you better understand density by comparing the relative densities of cans of Coke and Diet Coke.

This project explores whether nails, toothpicks, straws, or pen nibs are best for applying ink to paper.

This science fair project idea compares whether ionic dryers leave hair in better condition than non-ionic dryers.

Science fair project that compares tap water and bottled water for the presence of common impurities.

This experiment evaluates whether frequent texters have better finger dexterity compared to people that rarely use text messaging.

Science fair project which compares the rate of temperature change and the maximum temperature as a result of the angle of light radiation.

Science fair project that compares the relative carbon dioxide concentrations of various gases, including different types of vehicle emissions.

Science fair project which compares the rates of photosynthesis for various light sources. Which type of light will be best for photosynthesis and why?

This science fair project idea compares biodiversity between drops of water.

This science fair project compares the allelopathic chemical produced by the Black Walnut tree to a commercial herbicide in stopping the growth of a shrub.

Science fair project about different digital image file types, compares different encoding algorithms used to compress the data.

This science fair project explores discover whether the acidity of sour candy is comparable to that of battery acid.

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