Apologia General Science Experiment 12.1 What Combustion Needs

Apologia General Science 

Experiment 12.1 What Combustion Needs

These are the things we needed for the experiment.  Dd decided to add blue food color to the liquid in the bowl, for fun, towards the end, for fun!  You don't need to though!

First Dd lite the candle, then put a glass over the flame/candle to see how it would react.

The flame is using up the oxygen in the glass.

Once the oxygen was gone, the candle went out.

Next Dd added in a cup of vinegar...maybe 1 1/2 cups.

Then she lite the candle again, and it burned.

Then she added teaspoons of baking soda.

As the vinegar mixed with the baking soda, carbon dioxide was formed, and without oxygen, the candle went out.

For fun, Dd added blue food coloring to watch it spread out.

Dd lite another candle and tried to re-light the candle, but the bowl was still full of carbon dioxide, and would NOT light!  The match went out as soon as it got below the surface of the bowl.

Dd swished the air around in the bowl and cleared out the carbon dioxide, then tried another match, and it did light.

We've done this experiment with dry-ice and it works just the same.  It is easier to gather vinegar and baking soda than dry-ice!  

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