--- title: "Year 4 - Science: Effects of Liquids on Teeth" url: "https://stbarnabasdarwen.co.uk/news/2025-12-10-year-4-science-effects-of-liquids-on-teeth" school: "St Barnabas Primary School, A Church of England Academy" --- We are holding a number of open days for children due to start primary school in September 2027. Please see our admissions page for further details. Everyone welcome! # Year 4 - Science: Effects of Liquids on Teeth ![](https://files.schudio.com/st-barnabas-primary-school/images/news/IMG_0830.jpeg) 10 December 2025 We’ve been looking at teeth in-depth in Year 4 recently, particularly the role of our enamel in protecting our teeth. Last week, the class designed an experiment to test how different liquids would affect our enamel. This week, we carried out our investigation. We used eggshells to replicate teeth, and we tested 6 different liquids: water, milk, blackcurrant, coffee, Diet Coke and vinegar. To run the experiment, we soaked an egg in each liquid for 2 days. We then removed the eggs and wrote our observations. We then spent two minutes brushing and described the shells again. Vinegar was found to have the worst effect as it dissolved the shell just leaving the membrane to protect the egg inside. The darker liquids stained the eggs, and the water and milk didn’t change the eggshells much. ![](https://stbarnabasdarwen.co.uk/images/news/IMG_0830.jpeg) [Year 4](https://stbarnabasdarwen.co.uk/news/tag/year-4) [Science](https://stbarnabasdarwen.co.uk/news/tag/science) [![](https://files.schudio.com/st-barnabas-primary-school/imagecache/100x100c/news/IMG_1617(1).jpeg)](https://stbarnabasdarwen.co.uk/news/2025-12-09-year-6-lbq-adding-mixed-number-fractions) Previous ### [Year 6 - LBQ - Adding Mixed Number Fractions ](https://stbarnabasdarwen.co.uk/news/2025-12-09-year-6-lbq-adding-mixed-number-fractions) [![](https://files.schudio.com/st-barnabas-primary-school/imagecache/100x100c/news/Capture.jpg)](https://stbarnabasdarwen.co.uk/news/2025-12-11-worship-second-week-of-advent) Next ### [Worship - Second Week of Advent](https://stbarnabasdarwen.co.uk/news/2025-12-11-worship-second-week-of-advent) ### Personal Development - [News](https://stbarnabasdarwen.co.uk/news) - [Events](https://stbarnabasdarwen.co.uk/events) - [Photo Gallery](https://stbarnabasdarwen.co.uk/photo-gallery-category/our-gallery) - [Calendar](https://stbarnabasdarwen.co.uk/calendar) - [School Council](https://stbarnabasdarwen.co.uk/academy-life/school-council) - [Attendance](https://stbarnabasdarwen.co.uk/academy-life/attendance) - [Fundraising](https://stbarnabasdarwen.co.uk/academy-life/fundraising) - [Extra Curricular Clubs](https://stbarnabasdarwen.co.uk/academy-life/clubs) - [Little Leaders](https://stbarnabasdarwen.co.uk/academy-life/little-leaders) - [Visits and Visitors](https://stbarnabasdarwen.co.uk/visits-and-visitors) - [British Values](https://stbarnabasdarwen.co.uk/british-values) - [Protected Characteristics](https://stbarnabasdarwen.co.uk/protected-characteristics) ##### Location Knowlesly Road Darwen Lancashire BB3 2JA ##### Contact Us 01254 702996 ##### Stay Connected - [Facebook](https://www.facebook.com/stbarnabasce/) - [X](https://twitter.com/stbarnabasce) © Copyright 2021–2026 St Barnabas Primary School, A Church of England Academy School & Trust Websites by [ ![Schudio logo](https://stbarnabasdarwen.co.uk/img/logo/light.png) ](https://www.schudio.com/)