Objective: Identify and describe factors that influence reaction rates. Warm-up: 1. What are the basic definitions of a physical & chemical change? (Try.

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Objective: Identify and describe factors that influence reaction rates. Warm-up: 1. What are the basic definitions of a physical & chemical change? (Try this WITHOUT your notes) 2. What are the 5 indicators? (Try this WITHOUT your notes) HOMEWORK ON DESK with NAME on it.

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How Much Can You Remember About Physical and Chemical Changes? 1. Identify each of the following as either a chemical or a physical change. You must give a reason for your answer. a. Melting candle wax. _______________________________________________ b. Burning a candle. _________________________________________________ c. Tearing paper. ____________________________________________________ d. Burning paper. ___________________________________________________ e. Dissolving table salt. _______________________________________________ f. Mixing salt water and silver nitrate. _____________________________________ g. Cutting pieces of magnesium ribbon. ____________________________________ 2. Describe two observations you might make when a physical change occurs. 3. Describe two observations you might make when a chemical change takes place.