This half term in Science, Year 4 have been exploring the topic of States of Matter. This week, we carried out an exciting experiment to investigate how long it takes for a solid to change state when heated.
We began by recapping the three states of matter we have already learnt about: solids, liquids and gases. We discussed how changes of state are reversible, meaning that a liquid can change back into a solid through freezing, and a gas can change back into a liquid through condensation.
Our experiment aimed to find out how long it would take different types of chocolate to melt from a solid into a liquid. We explored three different types of chocolate: milk, dark and white chocolate. Each type is made from a different combination of ingredients, such as cocoa beans and milk, which can affect its melting point.
Before starting the experiment, we made predictions about which chocolate would melt the fastest and how long each type would take. To ensure it was a fair test, we carefully weighed out the same amount of each type of chocolate and placed them into bowls. The bowls were then placed into pre-filled hot water trays by the adults in the room to ensure everyone stayed safe. Once everything was ready, we started our timers at the same time.
We observed the chocolates carefully and looked for signs of melting. When we noticed changes, we used spoons to gently stir the chocolate to check whether it had fully melted. Once we were confident that it had completely changed into a liquid, we stopped the timers and recorded our results on our experiment sheets.
Finally, we wrote up our investigations and compared our results with our predictions. The results were very interesting, and we enjoyed discovering how different chocolates melt at different speeds!
Well done, Year 4, for conducting another fantastic science experiment!
What material or solid would you like to investigate next time?
