Whitening Teeth and Eggs
Hypothesis
Fluoride whitens teeth.
Materials Needed
A hard boiled with its white egg shell
Coke (any black drink)
Glass bottle
Any fluoride Tooth Paste
Old Tooth Brush
Procedure
Leave the egg in a glass in coke in a glass bottle for a day. Note the difference in the egg shell after a day. Clean the egg shell with toothpaste and tooth brush.
Observation
# 1 After a day the white egg shell was discolored and turned brown.
#2 When rubbed with fluoride tooth paste with a tooth brush the egg shell turned white again.
Conclusion
Fluoride helps clean and whiten teeth.
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