Egg-cellent Science in Y4

This week, Year 4 became scientists as we carried out a fascinating experiment to investigate how different liquids can affect tooth enamel!

We used eggs to represent teeth because their shells are made from a similar substance to tooth enamel.

We placed five eggs into different liquids:

Water

Soda water

Full-fat Coke

Orange juice

Distilled vinegar

We left the eggs to soak for five days and made predictions about what might happen. The results were amazing (and a bit gross!). The egg in coke became stained, turning a darker colour – just like what can happen to our teeth! The shell of the egg in orange juice began to bubble, blister and slightly dissolve. But the most dramatic effect was the vinegar, the shell completely dissolved, leaving behind a soft, squishy egg that we could gently bounce and hold!

We were curious to see if the shell (like enamel) protects what’s inside. Interestingly, most of the yolks stayed the same. However, the egg in orange juice looked slightly “cooked” – it was lighter in colour and more solid!

This experiment helped us understand how important it is to look after our teeth:

• Sugary drinks can create acids that damage enamel
• Acidic liquids can wear away the protective layer of our teeth
• Brushing our teeth regularly helps remove harmful sugars
• Visiting the dentist is important to keep our teeth healthy

Egg-cellent Science

Year 4

We loved this experiment and were amazed by the results—especially the rubbery egg from the vinegar! It really helped us understand why taking care of our teeth is so important.

Year 4 are definitely brushing extra carefully this week!