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

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.

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

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

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

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.

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 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.

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

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

This science fair project idea explores whether cats can be trained in the same way that dogs can.

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

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

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

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.