A scientific look at how trees grow, why they are important, and how they make other trees.

A scientific look at how rainbows are formed, why we can only see part of them, and how your location determines if you see one or not.

A scientific look at the natural processes that create waterfalls, and where they are likely to form.

A scientific look at how clouds are formed, why there are different types, and what you can tell about a cloud by looking at it.

Even more so than family, friends are able to influence each other’s recovery from drug addiction, but to do so requires a thorough understanding of the situation. Readers will learn the signs of abuse for various drugs, along with reasons for abuse, how to confront the friend, and how to encourage treatment. The many sources for further reference fulfill Common Core Standards by offering a means through which readers may draw on information from other sources and solve a problem efficient...