The science of jelly

solids

1. The science of Jelly Sample student response

2. What we needed to make the Jelly Jelly Crystals (any flavour) Water (boiling and cold) Measuring jug Bowl Cups for jelly mixture

3. How to make Jelly

4. How is making jelly teaching us about science?

5. It helps us to learn about solids, liquids and gases

6. Firstly, we begin with a solid. The jelly crystals are a solid as they hold their shape and does not flow.

7. When 250mL of hot water (a liquid) is added to the jelly crystals (a solid), the heat molecules in the water causes the jelly crystals to dissolve and turn into a jelly liquefied mixture.

8. When heating the water in the kettle, the temperature increased causing a gas to be produced. A gas was produced because the molecules in the water are heated causing some of the molecules to break free. Those molecules then form a transparent gas called steam.

9. Cold water is then added to the jelly mixture, however the jelly does not change states of matter. It is still a liquid.

10. The jelly mixture is then placed into cups and put in a refrigerator to ‘set’.

11. Once the jelly ‘sets’, it changes states of matter. It changes from a liquid to a solid. This change occurred due to the change in temperature. As the mixture cooled, the molecules condensed and the mixture formed a solid shape.

12. LEARNING OUTCOME From this experiment, we learnt how jelly starts off as a solid, turns into a liquid (due to a rise in temperature) and then when cooled (a decrease in temperature) turned back into a solid.