Robert Gardner 
How High is High? [PDF ebook] 
Science Projects with Height and Depth

How high is a skyscraper? How deep is a pond? How high is your school? There are so many things to measure in the world around you. The concepts introduced in this book will help you perform exciting and fun experiments. Some will even give you ideas for your science fair. Using simple materials, you can do everything a scientist does: conduct experiments, keep records, and draw conclusions from what you have learned. You will then be ready to discover the world of height and depth!