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In this popcorn experiment, students can explore how two things made out of the same material can have very different appearances and densities.

This science project uses Mohsâ Hardness Test to show kids how to compare the hardness of different types of minerals.

Let your kid experiment with textures among fabric and other materials that are smooth, rough, soft, or slippery—and then they'll make a texture book!

Do different types of oil mix or stack? Find out in this science fair project idea!

How greasy are your potato chips? Students will use a reliable method to quantify greasiness and compare different brands in this great science fair project.

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

This science fair project idea examines whether the colors of the spectrum respond differently in the thermal aspect when radiated by the sun.

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

In this cool science experiment, learn about magnetism and poles, and test magnet strength to find out if two magnets are twice as strong as one.

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

This project compares the strength of one, two, and three-ply toilet paper.

Science fair project that compares the ecology of different soil samples by identifying which sample has the most invertebrates living in it.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

Demonstrate how you can make your own compass using a magnetized needle. It also allows you to compare magnetic north and geographic north.

In this activity, students will think about the form and function of household objects as they compare and contrast kitchen serving spoons of various sizes and designs.

Discover whether different amounts of water added into a wine glass will produce a different pitch when their fingers are rubbed along the rim.

Science fair project that determines whether cooling eggs helps them be peeled more easily. Compare the time it took to peel each egg.

Determine if gender affects the ability to identify different smells.

This science fair project idea explores the different properties & interactions of sugar molecules.

Do lefties just write different or are their brains different? This science project has students explore what it means to be left handed.

This science fair project idea investigates the ability of different whitening toothpastes to whiten teeth.

The objective of this science project is to determine the length of time for different seeds to germinate.

This science fair project idea explores the different properties of matter.

This science project teaches students to classify different shapes of leaves.

Science fair project that determines whether mass and weight are the same or different.

This science fair project idea produces sounds by creating vibrations using different objects.

Check out this science project idea to compare organic produce to non-organic produce and how preservatives in food extend the shelf life of goods.

Learn how different types of soil affect how animal tracks form in this experiment!

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

Milk is made of water and fat; but how can you separate the two? Find out in this color changing milk experiment.