Science fair project which tests various sedimentary, igneous and metamorphic rocks to find out whether one rock family is stronger than the others.

How do organic materials become soil? This science experiment measures what materials biodegrade.

Learners hypothesize about and experiment with soil erosion in this hands-on activity.

Test out the pH levels of soil in your backyard versus soil in more wild environments to solve this science case.

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

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

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

This fun and easy middle school science fair project idea explores the topic of pollution and demonstrates if polluted soil affect the growth of green plants.

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.

Science fair project that examines the behavior of water and gravel in creek beds and the formation of sedimentary rocks.

Kids learn how to prevent erosion by growing grass. They'll test soil with grass against raw soil in this revealing science fair project idea for 4th grade.

In this science fair project, students create their own miniature salt flats at home.

Help your child plant a "tea garden": a garden made of herbs for making teas.

This science fair project idea creates a sedimentary rock and to investigate what takes place during the rock cycle.

Create a bee garden to help shelter bees in your area.

Watch pre-packaged seeds and seeds taken from inside fruits and vegetables grow. Which ones will grow faster? Read more in this science fair project idea.

This science fair project idea researches the definition of ‘biodegradable’ and explores this in a real-life setting.

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

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

Find out whether packaged seeds actually do expire in this new science fair project idea.

What are the effects of fertilizer on plant growth? What's the best fertilizer type (solid, liquid or powder)? Kids find out in this science fair project idea.

Grow potatoes in a plastic bag—easy to grow and harvest, and yummy to eat!

Explore if planting seeds in a certain direction will affect how fast it germinates.

What are buttress roots? In this fun science project, make a model of a rainforest tree and learn how they help trees survive in the tropical rainforest!

Help your child create a magical miniature garden in the most unlikely of places: a recycled plastic bottle!

This science project teaches students the relationship between compost and plant growth. Students conduct an experiment with different types of compost.

Create a soda bottle garden that defies gravity! This hanging terrarium is housed in a soda bottle and perfect for crafty kids with a growing green thumb.

Find out whether putting something on top of a plant will inhibit its growth.

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

The project determines which laundry detergent is best for cleaning clothes.