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!

Invite your fifth grader to test the different rates of liquid absorption in synthetic and cotton materials, such as nylon and cotton.

This homemade barometer allows your little scientist to contemplate and compare different air and weather conditions.

The rock cycle will come alive for your child when he uses broken crayons to create the three basic rock types.

Unlike other seed sprouting projects, this one allows kids to compare five different sprouts (either 5 herbs or 5 flowers) by watching them grow in a glove.

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.

In this project, different brands of microwave popcorn are tested and compared.

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

Compare animal and plant fats and observe, and record, and draw conclusions about their similarities and differences.

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 idea measures and compares effects of chemical weathering, specifically carbonation, on different kinds of rocks.

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

Teach your little scientist about the amazing powers of gravity by comparing the falling speeds of two yummy fruits

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

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

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.

This science fair project idea examines liquids of different densities.

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

The project investigates how friction affects motion by using different surface textures.

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.