1. What’s in air, anyways? Miss Laverty 2012 ***Experiment, lesson and worksheets adapted from the Edmonton Public School Curriculum book.***

2. Welcome If you are one of the first few people in the room, please hand out the work books Grab today’s worksheet from the blue handout bin Sit down and show me you are ready to “slice some apples!”

3. Apple Slices You will each get an apple slice to observe Please keep it on your paper towel until the end of class We will be observing the apple throughout class

4. Lights Out! 3 different sized jars Predict how long the candle will burn in each jar After the demonstration, record the results

5. Lights Out Inferences: – Fire needs oxygen to burn – If there is less oxygen present, the quicker the flame will go out – Oxygen is just one of the gases that make up air

6. Who turned out the light? Materials: baking soda, vinegar, container with lid, candle

7. Who turned out the light? Procedure 1.Light the candle 2.Put 3 to 4 teaspoons of baking soda in a container 3.Add 50-60 ml of vinegar to the baking soda 4.Tilt the container slightly to pour out the gas over the flame 5.Observe and record results

8. Who turned out the light? Results: – The flame went out when we poured the gas from the baking soda and vinegar mixture over it

9. Who turned out the light? Inferences: – When we mix baking soda and vinegar we create carbon dioxide (C0 2 ) – Carbon dioxide is heavier than air, so we can “pour” it onto the flame – Combustion means burning and requires, heat, fuel and oxygen – The flame goes out because the air had too much C0 2 and not enough oxygen

10. Real life example: Fire extinguisher: some types use a powder like baking soda to create Carbon dioxide gas and to smother the flame. Some actually are filled with CO 2.

11. YouTube Clips Fire extinguisher: http://www.youtube.com/watch?v=Sq_EPZauLhY http://www.youtube.com/watch?v=Sq_EPZauLhY Popcorn popping: http://www.youtube.com/watch?v=YFh6RAwELi0 http://www.youtube.com/watch?v=YFh6RAwELi0

12. Apple Slices What do they look like now? Why did this happen? What is it called? – Oxidization What can we do to prevent this? – Lemon juice (acid) – Refrigerate – Air tight container or packaging