This lecture follows several days of exploration into the structure of atoms and molecules. It comes immediately after the Whoosh Lab but before the students turn in their lab reports. This lecture should crystallize any unclear concepts, and give them the tools necessary to write a thorough lab report.Tags: ms-ps1-2, chemical change, chemical formula, chemistry, combustion, exothermic, integrated, isopropyl alcohol, middle school, ms-ps1-4, ms-ps1-5, ms-ps1-6, ngss, products, reactants, reaction, science, variables, whoosh lab