reactants - molecules or substances that participate in a chemical reaction
products - use stances that form from chemical reactions and they contain the same types of atoms as the reactants
Signs of Chemical Reactions
1. Changes in color 2. Changes in physical state 3. Emission of light of heat 4. Combustion 5. Formation of gas
Examples of Chemical Reactions
There were multiple examples of endsthermic and exothermic reactions. One example shows a substance growing when heated, which would be endothermic if you focus on the heat transferring into the substance.