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This content is taken from the National STEM Learning Centre's online course, Teaching Primary Science: Chemistry. Join the course to learn more.

Exploring changes in materials through practical work

In this video, Rachel shows how vitamin C tablets can be used to demonstrate a chemical reaction.

When water is added to the tablet, bubbles are formed as carbon dioxide gas is produced. Children often believe that the bubbles are already in the tablet waiting to be released, and so they can also look at a ground up tablet under a microscope, before adding water to it.


Think about when children are asked to explain what they see in this demonstration. What words/phrases do you need to be looking out for to ensure that children are learning the science correctly?

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This video is from the free online course:

Teaching Primary Science: Chemistry

National STEM Learning Centre