1. Catalyst A material that increases the rate of a reaction by lowering the activation energy Activation Energy The minimum amount of energy needed to start a reaction Chemical Reactions include a series of events that change the make-up of one or more reactants into products

2. Chemical Reactions begin when reactants get enough energy to allow the reaction to start. Activation energy is the MINIMUM amount of energy needed to start a reaction Who can help reactions get started? ENZYMES

3. Compare the result of enzyme activity in your stomach

4. Enzymes Materials that help other reactions occur. Digestive Enzymes Aid in the breakdown of food particles.

5. How do eHow do e How do enzymes work in your body?

6. Lab Review Compare Exothermic and Endothermic Reactions

7. Potential vs. Kinetic Energy

8. Textbook pages 163 Chemists can change the rate of chemical reactions by adjusting the 5 following factors. Explain …Concentration …Temperature …Surface Area …Catalysts …Inhibitors