Understanding the basics of matter is an essential part of studying physical science. This updated guide to matter is an interesting, helpful introduction to these concepts, which are a foundational aspect of science curricula. Basic experiments featured in the text allow readers to have an informative and complete hands-on learning experience. In addition, biographical information on some of the great minds in this field of science is also included, along with a detailed timeline to add a unique historical element to the text. As the second edition of a popular reference resource, the text reflects new information and perspectives on the study of matter.