Though one of the three most common states of matter on Earth, gases, as they are most often invisible, can be tough for young students to conceptualize. This book offers clarity in the form of straightforward diagrams and easy-to-understand text. Readers will comprehend such physical science concepts as evaporation, condensation, compressibility, fluidity, and volume with ease.

Why do anchors sink but corks float? Is it magic? No! It's physical science! By combining clear overviews with enlightening photography and diagrams, this volume will ensure that students understand the basic properties and variability of solid matter.