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

2. 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.

3. 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

5. 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