Learn all about chemical reactions with new, precise, yet easy-to-understand, definitions and explanations. What is the difference between a physical and chemical change in matter? What are the parts of a chemical reaction? How are chemical bonds affected in chemical reactions? What changes in properties occur as a result of chemical reactions? What changes in energy occur as a result of chemical reactions? What is the Conservation of Matter? The answers to all of these questions are covered in depth with graphics, diagrams and exciting video. On-screen, multiple-choice reviews at the end of each segment reinforce important concepts and make learning fun.