Search for Science Fair Projects

1000 Science Fair Projects with Complete Instructions

Human anatomy Science Fair Project

Tooth Decay Experiment With Eggs

Tooth Decay Experiment With Eggs | Science Fair Projects | STEM Projects
Egg shells are like tooth enamel, tough but vulnerable to sugary and acidic drinks. In this experiment, you will soak hard-boiled eggs in different beverages for 2 days and see how they affect the eggshells.


The hypothesis is that sugary and acidic drinks will weaken the eggshells, just like they can erode tooth enamel.

Method & Materials

You will label cups with different beverages, soak hard-boiled eggs in them for 2 days, and observe any changes in color and texture of the eggshells. You will also try brushing off any stains with a toothbrush.
You will need clear cups or glasses, hard-boiled eggs, toothbrush, toothpaste, and various beverages such as soda, juice, vinegar, and water.


This experiment shows that sugary and acidic drinks can weaken tooth enamel, just like they can erode eggshells. One interesting observation is that brushing with toothpaste can sometimes help remove stains.

Why do this project?

This science project is unique because it uses a simple and fun material like hard-boiled eggs to demonstrate the effects of sugary and acidic drinks on tooth enamel. It also provides a practical lesson for oral hygiene and encourages critical thinking about the importance of choosing healthy beverages.

Also Consider

1) Use different types of toothpaste to see if they have different effects on the stained eggshells. 2) Compare the effects of hot and cold beverages on the eggshells to see if temperature plays a role in tooth decay.

Full project details

You can find additional information and details for this science fair project here. Have fun exploring!

Related videos

Hey there! Here are some awesome videos about this science project that we think you'll really like. They're not only super fun, but they'll also help you learn more about the science behind the project. So sit back, relax, and get ready to have some fun!!
The egg shell is like our teeth enamel. See what happens to the egg shells when they're placed in soda, orange juice, grape juice, sugar-free sports drink, and water.
This is a longer tooth decay experiment in which eggs are soaked in different liquids for 24 and 48 hours. The video suggests using white eggs to easily observe any staining caused by vinegar, soda, or water. What do you think will happen to the egg shells in vinegar, soda and water?
Share this Science Project:

Related Science Fair Project Ideas

Recognizing Facial Expressions
Can you tell what someone is feeling just by looking at their face? Find out in this fun science project!
How Temperature Affects Taste
Do you like your food hot or cold? Find out how temperature affects your taste buds in this fun experiment!
Hand-Eye Coordination and Age
Does age affect how well you can catch a ball?
Share this Science Project: