Presents an introduction to what gases are,in simple text with illustrations, including information on how they behave when heated or under pressure, how they can be detected, and how they are made of atom and molecules. Includes glossary.
Presents an introduction to solids, in simple text with illustrations, that describes the different types of solids and their properties and explains how they apply to everyday life.
Presents an introduction to liquids, in simple text with illustrations, describing the different kinds of liquids and their properties, as well as how they are used in everyday life.
