Fact finders : how long does it take

Examines the processes of the water cycle.

Examines the cycles of stars and how long they last.

"This book uncovers just how long it takes for the remains of a living thing to become a fossil. Learn fascinating facts about this process. Read this book to find out more about the science behind the cycle"--From the publisher's web site.

"This book uncovers just how long it takes for a diamond to form. Learn fascinating facts about this process. Read this book to find out more about the science behind the cycle"--From the publisher's web site.

Examines the processes of trash decomposition, and explains how long it really takes.