The project compares three different methods of testing turbidity in water: the secchi disk, spectrophotometer, and turbidity test kit.

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.

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

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 do search engines work? What makes various search engines different? This project delves into the world of web crawlers, caching, indexing and algorithms.

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

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.

In this science fair project, we will test how different kinds and shades of hair respond to bleach.

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

Melt the ice, but save the lawn. The objective of this science fair project is to explore the effects of different substances on melting ice.

Explore the properties of light and color using photographic filters. Take pictures of color spectrum, compare results of different filters.

Kids make strong bubbles to investigate the effect different additives have on bubble life in this cool science fair project idea.

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

Monitor the impact learning how to play chess has an academic performance. Divide subjects into two groups compare GPA

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

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.

Store seeds under three different environmental conditions. Plant seeds in carefully marked groups, watch them grow. Compare results.

Boost your preschooler's attention to detail by getting her to explore the differences between two different pumpkins: large and small.

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.

This two-ingredient dough, sometimes called "moon sand," is a quick and cheap way to let kids explore their senses, build fine motor skills, and play.

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.

Science fair project about different digital image file types, compares different encoding algorithms used to compress the data.

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

This experiment explores how microwave radiation affects fungi, bacteria, and plant life.

This science fair project idea teaches about the size of two different systems: the solar system and an atomic system.

Air resistance is a crucial factor when designing a parachute. In this science fair project, students find what type of material works best as a parachute.