Purely physical – Mostly Melting

In the mess scene Investigation we explored melted chocolate and frozen milk.

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This is a picture of a non melted button and a glass of milk.

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Can you describe the chocolate and milk?

In cooperative teams you are going to test your ideas about how the melted chocolate and the frozen milk can be returned back to their original state as quickly as possible.

Each team will be given melted chocolate and a frozen milk cube. (Teams will need to explore ways of making melt as fast as possible which include, wrapping it in a towel, putting it in the sun)

The teams task is to return the melted chocolate and frozen milk to its original state as fast as possible.

Speakers are to share their team’s ideas.

Use the PROE to record the investigation.

PROE

PREDICT: Record one of the predicted ways the ice cube might melt the fastest, for example, wrap it in a towel or blanket.

REASON: Reasons to support the predictions and record in the class science journal, for example, a blanket makes things warm so I think pit will melt the ice-cube fastest.

OBSERVE: Explain that teams will observe an ice cube melting for each prediction and record their results for each prediction.

EXPLAIN: Teams to compare their predictions with their observations, and explain why the results did or did not match their predictions.

Reminder: Do not taste the chocolate button or the milk cube for allergy and hygiene reasons.

In cooperative groups discuss how are you going to keep the test fair?

– What will each team measure?

– When will each team start recording?

Speakers discuss results.

Students to summarize what they have learnt;

* What I have learned about changes is…

* I know this because…

* I want to know more about…

Changes – STEPS

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