Robert Gardner & Phyllis J. Perry 
Ace Your Ecology and Environmental Science Project [PDF ebook] 
Great Science Fair Ideas

How many different organisms can you identify in a square meter of earth? What happens to plants if they don’t have enough sunlight? Readers will learn the answers to these questions and more with the fun ecology and environmental experiments in this book. Young scientists will explore interactions of organisms and their environments. Many experiments include ideas students can use for science fairs.