Soil is made up of different layers. How far down do you need to dig to find the soil horizon, or the place where bits of leaves and branches become soil?

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

The objective of this science fair project is to experiment with balancing everyday objects and observing the the effects of gravity on materials.

In this experiment, kids will see if pruning tomato plants makes them more fruitful and learn about the factors that contribute to a plant's fruit production.

This science fair project investigates whether tapping the top or the side of the can will stop a vigorously-shaken can of soda from exploding.

Kids will learn how to measure the viscosity of liquids by making their own homemade viscometer in this great science fair project idea.

Science fair project which simulates the global conveyor belts on a small scale, and observes the effects of wind, density and temperature on water movement.

How can we describe the relationship of magnetic field strength vs. distance? Kids will find out with this free science fair project idea.

Learn about the effect of artificial light on plant growth versus natural sunlight and delve into some biology and botany concepts in this science project.

This science project allows students to study the psychology of happiness.

This science fair project idea examines whether plants are still able to grow normally if they are turned upside-down.

Science fair project which uses coins flips to visually demonstrate the probability of an event and how to express it.

Can you increase the light and plant growth in your garden using mirrors? In this experiment, measure light reflection and find out!

Check out this cool science project idea to learn about rocks and explore the cycles of formation, breakdown, and reformation of rocks in the Earth's crust.

This science fair project idea explores whether there is a connection to the color a person wears and the way their emotional state is perceived by others.

This science fair project idea explores whether a sundial is as accurate as an atomic clock when telling time.

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 science fair project idea explores whether white light can be separated into different colors.

How does salinity affect the point at which water freezes? Kids will find out by performing this cool melting ice experiment.

Kids will build a turtle habitat in order to observe the climate preferences of this cold-blooded reptile.

Demonstrate how static electricity can cause an object to move. It also examines just how an object affected by static electricity will move.

Can you plant the insect-attracting borage plant to increase the amount of beneficial insects in your garden? Find out in this experiment!

Science fair project that identifies the differences between soils from different environments and attempts to figure out why those differences exist.

This science experiment tests why guacamole goes brown and if leaving the pit in will stop guacamole from turning brown.

Protozoa and ciliate and amoeba, oh my! The objective of this science fair project is for students to use a microscope and identify microscopic life.

In this cool project, create a lighted, scale model of the different layers of the Sun, including the core, radiation and convection zones, and photosphere.

Determine which kind of rock (igneous, sedimentary, metamorphic) has the greatest reservoir capacity, which is the ability to hold the most oil and natural gas.

In this classic Ivory soap experiment, kids learn what happens to different types of soap in the microwave, and why!

This science project teaches students to classify different shapes of leaves.

The moon doesn't produce its own light, so why can we see it shining in the sky? Learn about reflection and planetshine in this fun and easy science project!