This week in science, Year 5 delved into the fascinating world of irreversible changes by experimenting with candles and exploring the process of combustion. The children carefully observed the behavior of burning candles, noting changes such as melting wax and the production of gases. They then created detailed diagrams to explain the scientific processes at play, including the release of carbon dioxide and water vapor during combustion. Through these observations, the children gained a deeper understanding of how chemical reactions work and why some changes cannot be reversed.