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

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

In this project, the fingerprints of family members are compared to determine if people from the same family have similar fingerprints.

In this science fair project, students learn how pressure can make the minerals in a rock line up in the same direction and form bands and foliation.

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

Have your kid determine if a goldfish can be conditioned to expect food the same way Pavlov's dogs did with this fascinating science fair project.

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

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

Use chemical analysis to identify a variety of mystery powders that look the same but actually have very different properties.

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

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

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

In this experiment, the weight of aluminum cans will be compared.

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

This science fair project idea highlights decomposition rates by comparing how long it takes an item to decompose in a compost pile vs. a landfill.

Introduce your fourth grader to the concepts of solstices by observing the length of her shadow on the shortest day of the year, compared to other solstices.

This project demonstrates the correspondence between the volume of water displaced by a submerged object and the volume of the object displacing it.

Find out whether packaged seeds actually do expire in this new science fair project idea.

The objective of this science fair project is to observe the differences in heat absorption for darker colors vs. lighter colors.

Does skin thickness really decrease fruit spoilage? Find out in this science fair project idea!

Science fair project that determines whether landscaping fabric impacts the ability of plants to receive water.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

The project investigates the affect music has on plant growth while experimenting with rock, classical and no music.

This science fair project idea examines which type of insulation holds in the most heat.

Magnets vary in strength. Have your young scientist figure out which kind of magnet is the strongest when you have him conduct this attractive experiment.

To help your child learn how to use a thermometer, try this temperature collecting activity at home.

What's the chemistry behind dyeing Easter eggs? Will adding vinegar to dye help the eggshell absorb the color? This colorful science project has the answers!

Did you ever add salt to pasta? Did it help cook the pasta faster? If not, find out in this science fair project idea.