1. Unit 2: Chemical Interactions Chapter 6: Chemical Reactions Big Idea: Chemical reactions are processes in which atoms are rearranged into different combinations of molecules

2. Mrs. Lee - Ch 62 4 Sections 1.Observing Chemical Change 2.Describing Chemical Reactions 3.Controlling Chemical Reactions 4.Fire & Fire Safety

3. Mrs. Lee - Ch 63 Sec 1: Observing Chemical Change KEY CONCEPTS Changes in matter can be described in terms of physical changes & chemical changes Chemical changes occur when bonds break & new bonds form Chemical reactions involve changes in properties & changes in energy that you can observe

4. Mrs. Lee - Ch 64 Sec 1: Key Terms Matter Chemistry Physical property Chemical property Physical change Chemical change Reactant Product Precipitate Endothermic reaction Exothermic reaction

5. Mrs. Lee - Ch 65 Sec 2: Describing Chemical Reactions KEY CONCEPTS Chemical equations use chemical formulas & other symbols instead of words to summarize a reaction In chemical reactions, the number of atoms stays the same no matter how they are arranged, so their total mass stays the same

6. Mrs. Lee - Ch 66 Sec 2: Describing Chemical Reactions (cont’d) To describe a reaction accurately, a chemical equation must show the same number of each type of atom on both sides of the equation 3 general types of chemical reactions are synthesis, decomposition & replacement

7. Mrs. Lee - Ch 67 Sec 2: Key Terms Chemical equation Conservation of matter Open system Closed system Coefficient Synthesis Decomposition Replacement

8. Mrs. Lee - Ch 68 Sec 3: Controlling Chemical Reactions KEY CONCEPTS All chemical reactions require a certain amount of activation energy to get started Factors that affect rates of reaction include surface area, temperature, concentration & the presence of catalysts or inhibitors

9. Mrs. Lee - Ch 69 Sec 3: Key Terms Activation energy Concentration Catalyst Enzyme Inhibitor

10. Mrs. Lee - Ch 610 Sec 4: Fire & Fire Safety KEY CONCEPTS The following 3 things are necessary to start & maintain a fire:1) fuel 2) oxygen 3) heat If you know how to prevent fires in your home & what to do if a fire starts, you are better prepared to take action

11. Mrs. Lee - Ch 611 Sec 4: Key Terms Combustion Fuel