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Kids learn about examples of mechanical weathering and conduct an experiment with seeds and plaster in this cool geology science fair project idea.

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

This science fair project looks one of the most important factors affecting seed germination: water. A fun and easy plant biology experiment for 3rd graders.

Science fair project which determines whether plants are able to get enough nutrients from different types of garbage.

Why do plants wilt? Kids will learn to think critically about what environmental factors affect plants, and what plants need to survive.

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.

Do you think you can blow down a sand castle with a mighty wind? Find out which material stands up best to erosion in this erosion experiment.

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.

This science fair project compares the allelopathic affects of juglone, a chemical agent produced by the Black Walnut tree, on two plants.

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.

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!

Do you think you could walk around upside down -- with your feet in the air and your head on the ground?

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

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

The objective of this science fair project is to set up a compost bin to convert food scraps and organic waste.

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

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.

The objective of this science project was to build a model of a volcano and observe reaction between different substances, including baking soda and vinegar.

Learn about the layers of the Earth and make a model! Create a earth layer book, cake, or clay diagram.

Do earthworms like moisture or darkness? Find out as we explore the relationship between earthworms and light.

Examine whether distilled water, spring water, or regular tap water yield faster plant growth.

This science fair project idea discovers if an artificial light source will yield the same plant health and growth rates as light from the sun.

This science fair project idea explores plant growth from a bulb, root, and a stem and investigates asexual plant reproduction.

What's the best way to make DIY compost? Kids will learn about aerobic and anaerobic decomposition while learning to appreciate the value of composting.

Discover flight initiation distance as you play around in the park with this fun bird watching project!

Learn about savanna flora and fauna in this science project! Take a look at characteristics of tropical grassland plants and animals that help them survive.

Do you have your isopods straight? Learn about sow bug and pill bug behavior by building a terrarium to study them in!