BRONZE

Teeth vs Beverages

Staining affects of different types of beverages on the colour of your teeth
Kyla MacNicol
Grade 6

Hypothesis

I think that coffee is going to stain the egg shell the worst after that I feel like it will be coke, tea, and then I think that cranberry juice is going to stain the egg shell the least of them all.

PLEASE SEE ATTACHED SLIDE SHOW FOR MORE DETAIL ON THE PROJECT.

Research

Tested 4 different liquids (coke, coffee, tea and cranberry juice) effects on staining of teeth.

Variables

Controlled - egg shells from the same carton of eggs, for all experiments

Manipulated - the type of liquid I put the shells into

Responding - the final colour of the egg shell

Procedure

1. Use a push pin and a straw to hollow out 4 eggs to get the shells.

2. Pour the same amount of each liquid into 4 separate containers.  (coke, coffee, tea and cranberry juice)

3. Remove shells from the liquid after 24 hours and record observations into the observation table.

4. After observations, place the shells back into the liquid.

5. Repeat step 3 and 4 until the end of the 3 day trial.

6. After recording final observations, clean up work space and dispose of the used shells.

 

Observations

Shells got darker after each 24 hour observation, some more than others. Coke ended up staining the egg the most.

Analysis

Table of results and pictures of the results each 24 hour period.

Conclusion

The coke was the darkest of them all but then coffee was pretty close to the coke. The cranberry juice was the third and the tea was the lightest of them all at the end.

Application

To see if drinking different liquids has an affect on human teeth.

Sources Of Error

The coffee and tea liquids may not have been the exact same strenghth each time.  (ex. the coffee might have been stronger the first time and not as strong the second time).

Acknowledgement

My Mom, teachers and the school.