see whether all liquids evaporate at the same rate. In other words, does water evaporate at the same rate as juice?

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

This fun middle school science fair project idea explores the process of respiration and determines whether boys and girls have the same lung capacity.

This science fair project idea focuses on two classes of sugars monosaccharides (fructose) and disaccharides (sucrose or table sugar).

Compare the whitening abilities of four different brands of whitening toothpaste to see which one whitens the fastest and which one whitens the most.

Do males really prefer listening to male than female singers? Find out when exploring this science fair project!

Administer IQ tests to volunteers. have one group practice typical IQ test problems. Then compare results of the two groups.

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.

Determine whether magic salt is more effective at melting snow than regular salt. Pour one ounce of salt over the ice cubes, compare the melt downs.

This project explores how and how much one family can reduce the amount of garbage they accumulate over a three month period.

Compare air temperature with the infrared temperature from a reflecting surface at different times of the day, in shade and in sunlight.

Compare different remedies for cooling the mouth after eating spicy food.

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.

Science fair project idea helps conceptualize probability. Compare probabilities and outcomes of cards drawn from a standard playing deck.

Compare the ignition rates of various types of flame-retardant materials.

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.

This science fair project studies whether DSLR and Point-and-Shoot cameras work the same way under all conditions.

In this science fair experiment, high school students determine if all proteins denature at the same temperature.

This science fair project idea studies the acidity of rain water and whether the acidity is the same on all rainy days or does it fluctuate.

Assess physical and mental states of subject before and after drinking coffee. Compare initial expectations with their reported conditions.

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.

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.

The objective of this science fair project is the compare the rate and efficiency of disaccharide and polysaccharide fermentation by yeast.

Did you ever drink spoiled milk? Find out whether whole milk spoils at the same rate as 2% and skim milk.

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