Chemical Reactions!

LG: I can state the signs of chemical change and describe reactions using word and chemical equations

What is a Chemical Reaction?• A Chemical Reaction is an event that causes the

atoms of the reactants to be rearranged or re-grouped to form products

H2 + Cl2 2 HCl

Signs of Chemical Change• What clues tell you a chemical reaction

has occurred?

Activity!• Observe various changes and decide whether

a chemical reaction has occurred. • Be sure to explain your choice!