Science Spies 3 (exclusively online mission)

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By Karen Hartfreelance writer

Get your class working as Secret Spies Lab Assistants for this top secret mission: How can we make water get bigger?

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The focus of this investigation is to explore changing states through looking at water expansion. The investigation is designed to introduce the concept of molecules expanding to a Key Stage 1 class. It also provides an accessible means of gaining knowledge during a hands-on science lesson. Resources are minimal and are very simple to prepare. I find this activity works best with the class divided into small groups working on individual work stations. Now the investigation is ready to begin!

You will need per group: one plastic bottle (not a glass bottle); a piece of foil; access to a freezer and a water tap.

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