This document describes the process of making jelly and what it teaches about states of matter changes. First, jelly crystals are a solid that dissolves into a liquid when mixed with hot water. When the water is heated, some molecules break free and form a gas. After adding cold water, the jelly mixture remains a liquid. When the jelly cools in the refrigerator, it changes from a liquid to a solid again as the molecules condense due to lower temperatures. The experiment demonstrates how jelly changes between solid, liquid, and gas states with temperature changes.

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

3. How to make Jelly

4. How is making jelly
teaching us about
science?

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
temperatur
e 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

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.