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Tree rings can tell the age of the tree but also information about the world. This science experiment uses tree stumps to discover new facts.

Soil and energy don't go together, right? That would be as bizarre as a pairing of peanut butter and marshmallows! Well, actually...

This science fair project idea examines whether boys and girls differ in reflexes.

Would it hurt to skip brushing your teeth just this once? Let's find out by seeing which foods produce the most mouth bacteria.

What's the difference between a microwave and an oven? Use mashed potatoes to explore which kitchen appliance does a better job at keeping food warm.

In this pinto bean germination experiment, you'll learn about how fertilizer aids in growing pinto beans into seedlings.

In this science fair project, students discover how sedimentary layers form as sediments like mud, silt and sand settle over time.

This science fair project teaches students the differences between fruits and vegetables.

Science fair project idea which teaches you how to make butter by separating cream into butter and buttermilk.

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 fair project idea explores whether talking to a plant will help it grow.

Kids will learn about the interaction of lactose and lactase in milk and discover why we describe enzymes as catalysts in this fun science fair project.

In this experiment, young ecologists will learn about a type of edge effect: how trees and plants at the edge of a forest can act as a weed filter.

Science fair project that teaches you about chemical indicators and how to make your own in order to identify various mystery solutions.

Find out which kind of bubble wrap fares best when put in impact.

Check out this cool science fair project idea to explore which other common animals besides scorpions glow under a UV Black light.

Determine whether butterflies like to drink sugar water, salt water, or plain water.

In this science fair projects, students will grow out the bacteria that collect on air conditioner filters.

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

Explore how sound waves are reflected and absorbed by producing echoes. Analyze which locations produce echoes.

This project examines whether people's taste perception is influenced by what they see.

Science fair project that examines albedo, and how this information is applied in the design of cars, sportswear, and other items. Which colors reflect light?

Science fair project examining barometric pressure, and how it can be used to predict the weather. How does atmospheric pressures relate to weather conditions?

The goal of this evaporation experiment is to learn about how different external conditions affect drying time.

This science fair project idea explores whether it is easier to balance on a narrow ledge or on a rope.

In this science fair project, apply the principles of leverage and force by building six simple machines designed to set weights in motion.

The goal of this science fair project is to discover the science behind carbonated soft drinks and apply this knowledge to create a new one.

Learn whether writing things down really makes things easier to remember.

Science fair project that examines the different types of precipitation, evaluates the density of snow and calculates the ratio of snow-to-liquid.

Science fair project in which you will learn more about the natural world by preserving and identifying different animal tracks.