Objective: Tell the difference between a physical and a chemical change Warm-up: What is the difference between a physical & chemical change?

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Presentation transcript:

Objective: Tell the difference between a physical and a chemical change Warm-up: What is the difference between a physical & chemical change?

Tell the BASIC idea/definition for the following. What is a physical change: What is a chemical change: A change in appearance only that does NOT make a new substance. A change that causes a new substance to be formed, must have at least one indicator.

LAB: Changes in a Burning Candle First read through ALL of the procedures Prepare materials -- Put 150-ml cold water into a beaker Perform experiment and record data Answer “Analyze and Conclude” questions

Changes in a Burning Candle 1. Physical Changes: 2. Chemical Changes: Wax melted water turned to steam water heated candle got smaller wick burning soot created smoke created carbon dioxide created 3. What else is needed for combustion besides fuel? Oxygen – Proof is the flame went out when we took oxygen away by putting a flask over the candle. 4. What are the 2 chemical products of combustion?? Carbon Dioxide – in the smoke Carbon – soot on beaker 1. Why was the water needed? To seal out air