1. On Target? Do this on your Warm Up worksheet! Turn in your lab packet and worksheet to the appropriate labeled box! What do you think needs to be present for something to burn? Why? (Fire alone is not an acceptable answer!)

2. For today... 1.Warmup 2.Fossil Fuels? 3.Combustion equation Objective: I can complete the chemical equation for combustion by experimenting to find the products.

3. Instructions Things in purple are for discussing Things in blue are for writing in notebook

4. Fossil Fuels What is a fossil fuel? How are these made? Listen as I read a paragraph from the book...

5. Fossil Fuels

6. Formula for Fossil Fuels Fossil Fuels are made out of various combinations of Carbon and Hydrogen – BUT these are always in proportion to each other C n H (2n+2) How many hydrogens with 20 carbons?

7. Making the equation for combustion Burning a candle is a simple example of hydrocarbon combustion so we will use this to figure out the reactants and products of a combustion reaction For our first reactant, use n=20

8. Write BIG in notebook: C 20 H 42 + _____  ______+______ What gas do you think needs to be present for something to burn? Add this to your equation and now we have our reactants

9. Figuring out the products 1.Make sure your spoon with the ice is cold 2.Dry off the bottom of your spoon with a paper towel-MAKE SURE IT IS COMPLETELY DRY! 3.Light the candle and hold the spoon about 1cm above the flame 1.What is happening to the bottom of the spoon? 2.What do you think this substance is? 4.Blow out the candle and add this product to your equation

10. Figuring out the 2 nd product Demonstration 1.Beaker has BTB water in it 2.Watch what happens as the candle burns and some of the gas is trapped 3.What is happening to the BTB water? 4.WHAT IS THE 2 nd Product? Add this to your equation

11. Balance the combustion equation with your group HINT: If you are getting decimals/fractions, multiple everything by 2 ___C 20 H 42 + _O 2  __H 2 O +__CO 2 Answer in notebook: This experiment simulates the movement of carbon from ____________ to the _____________.

12. Tomorrow: You will take a carbon cycle quiz. I know most of you don’t have the CC mastered, BUT it will be a good check in on where you are The retake will be a take-home IF YOU TRY on Thursday.

13. STOP and THINK Pg 571 2-4