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What’s in air, anyways?

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

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What’s in air, anyways?

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  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 • Light the candle • Put 3 to 4 teaspoons of baking soda in a container • Add 50-60 ml of vinegar to the baking soda • Tilt the container slightly to pour out the gas over the flame • 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 (C02) • 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 C02 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 CO2.

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

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