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Chocolate changes

Topic: 6D Reversible & irreversible changes

This is a SATS revision exercise. Chocolate undergoes many changes from cacao pod to chocolate itself. Some of these changes are reversible and some are irreversible. But which ones?

In this activity children learn about reversible and irreversible changes. They correctly sequence the story of how chocolate is made. They label which of the changes are reversible. They use their knowledge to write a letter to a child in Ghana, explaining how cocoa beans are made into chocolate for Easter eggs.

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Try the Activity Learning Objective

Click to Download Chocolate changes Teacher notes
Chocolate changes Teacher notes

Click to Download Chocolate changes activity
Chocolate changes activity

   

· That some changes that occur when materials are mixed cannot easily be reversed

Children will demonstrate this by completing the task on page 2 successfully.

· That heating some materials can cause them to change

Children will demonstrate this by completing the task on page 2 successfully.

· That cooling some materials can cause them to change

Children will demonstrate this by completing the task on page 2 successfully.

   
Web Links

Divine chocolate
From bean to bar - description of how chocolate is made from cocoa beans from Ghana

Cadbury
Resources, games and information about Cadbury's chocolate and its factory

Exploratorium
Sweet lure of chocolate - the chocolate-making process

How Stuff Works
Chocolate making and photos

Venezuelatuya
Photos of the different stages of chocolate making (in Spanish)

Teaching Ideas
Practical science investigation worksheet to design an experiment on the melting of chocolate

Teaching Ideas
How to design a ‘wicked' science investigation - gives children clear advice about how they should plan and implement a science investigation.

 
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