In this activity, you will find out how a change in the structure of a molecule can change its physical properties. You will make your own slime by adding contact lens solution and bicarbonate of soda to PVA (school) glue. This is a similar process to how plastic is made, where oil (a liquid) is turned into a solid through a chemical reaction, polymerisation.
To make your slime, you will need three ingredients PVA glue, contact lens solution and baking powder. You can also add some food colouring. You can adjust the units below based on the amount of glue you have.
You can extend the learning for this activity by teaching a full lesson about how plastics are made. For primary school, there is a key stage 2 science lesson What are plastics? Part two and, for secondary school, have a look at the key stage 3 science lesson How are plastics made?.
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