This title provides an overview of matter and physical changes. Text includes a simple overview of matter and examines properties, states, phases, and atoms. Atomic theory is introduced. Information is explained using real-world examples and supported with graphics and photos. This book concludes with two simple, kid-friendly experiments. Aligned to Common Core standards and correlated to state standards. Checkerboard Library is an imprint of Abdo Publishing, a division of ABDO.