several mentions of billions/millions of years ago.

Great book for a class that is learning about the rock cycle.

The book is an information book. It talks about the different cycles rocks go through. The book starts off explaining where rocks got started and explains different facts. Throughout the book, children will learn how rocks came about and where they are today. It is a great science book that explains the cycle of rocks.

Great book for all ages! it would be great to use for a earth-science lesson or unit. there is a lot of information in this book that could be used in many different ways.