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.