Year 6 STEM Project

18th Jan 2019

Year 6 STEM Project

"Today we were set a challenge to become engineers. Two TWI employees (Amit and Michelle) guided us step by step to build white chocolate bridges and test how much weight they could hold before breaking. First we built a bridge using four chocolate bars. We melted the sides of the chocolate using glass bottles filled with hot water. Then pressed the edges together to make a square bridge. Then we tested a single bar of chocolate by spanning it across two beakers and placing weights on the middle of it. Our group managed to put 1.1kg on the chocolate before it snapped. After that we tested the square bridge in the same way. The most weight it could hold before breaking was 10kg. I had a really good time and I would definitely recommend it."

Kiera Swindon

"Today Mrs Singleton's maths group were visited by two employees from a local engineering company known as TWI. They set us the challenge of seeing how much weight a hollow cuboid bridge of chocolate could hold before breaking. Starting off our challenge, we tested how much a single bar could hold and that ended up snapping in half at 1.7kg. Then Amit (who was running the project) introduced us to welding. Welding is the process of joining materials together. The way he showed us was placing the corners of the chocolate onto a bottle full of hot water. This melted the edges and made them suitable to be stuck together (welded). Once conjoined, he put them in the freezer. When they were set, we placed the weights on each bar, as we did with the previous plank bridge and tested how much weight it would hold before breaking. The best bridge could hold 10kg."

Brad Lynch-Flynn

"We were all set a challenge by a local company called TWI, to see how many kilograms/grams it would take to break a bridge made of chocolate. The items used were: a single bar of chocolate, 4 bars of chocolate, a wine bottle containing hot water and two cups. We started off by placing two cups on a table with a single bar of chocolate on (so it looked like a bridge). Then we gathered some weights and carefully placed them on the chocolate to see how much weight it would take to break the bridge. It took 1.7kg. After that we took the 4 bars of chocolate, melted the edges a little bit so they could be stuck together (welded), creating a cuboid. Once the edges were set we balanced the cuboid bridge across the two cups and used weights to see how much weight it would hold before breaking. This took a total weight, before breaking, of 10kg."

Ella Opie