Text and photographs examine the inner-workings of toys, discussing the scientific principles that relate to toys, and providing instructions for a related project.
Explains how melting and freezing changes the forms of liquid and solids, what causes melting and freezing, and how water can exist as a liquid, solid, and gas.
"Living things depend on a few invisible but essential nutrients to survive. These nutrients each have their own purpose. But they are also interconnected in the nutrient cycle"--Provided by publisher.
An introduction to solids that explains how they are different from liquids and gases, describes how solids can change, and discusses the different forms of matter.
