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Effect of carbonated drinks on the erosion of tooth enamel

Materials

The materials required for this science fair project:

-    3 transparent bottles
-    1 bottle of Coca Cola
-    1 bottle of Sprite
-    1 bottle of root beer
-    1 digital weighing scale
-    3 teeth (of identical size and weight)

Procedure

1.    For this science fair project, the independent variable is the brand of soda used to immerse the teeth. The dependent variable is the weight of the teeth. This is determined by checking the weight of the tooth using the digital weighing scale once a day. The constants (control variables) are the size of the bottles, the amount of soft drink in the bottles, the size of the teeth, the temperature of the environment (which will remain at room temperature) and the length of the experiment.

2.    Fill the 1st bottle with the Coca-cola, the 2nd cup with Sprite, and the 3rd cup with the root beer.

3.    Wash and clean the 3 teeth. Dry them. Then, check their weights on the digital weighing scale and record the readings in a table, as shown below.

4.    Place a tooth inside each bottle. After the first day, remove the teeth from each bottle and check their weights. Record your readings in a table. Then, refill the bottles and replace the teeth. Repeat this process every day for the next 4 days.

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Complexity level:
4
Project cost (\$):
10
Time required:
1 hour for preparation, 5 days for observation
Material availability:
Very easily found
Safety concerns:

None