Making Bread - Microbes

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Aims and objectives
This is a series of investigations and activities developed to help pupils understand about microbes and the parts they play in human health.

Previous knowledge
Although this resource assumes either no knowledge or misconceptions regarding microbes, it would be useful for students to have a broad mathematical base (for recording and analysing results in spreadsheet format) and a structured understanding of creating and conducting fair tests.

In the classroom
There are many misunderstandings about what microbes are and how they can harm us or do us good. This series of investigations will help students understand what microbes are and how they can affect our health.

The activities are centred around the process of making bread and the actions of yeast. Included in the activities are suggested investigations into tests to measure the actions of water, sugar and yeast in the production of carbon dioxide.

The series of activities can be broken down into units of work which will support medium term planning. These can be worked on by small groups of students who periodically report back to the class for peer and teacher assessment. Alternatively, the units can be used for home learning activities to enhance or extend existing planning.

Support materials description: Resource type:
The first worksheet suggests a basis for one method to collect and record the production of CO2 and, by altering variables, create and test predictions. Making_bread.pdf
The second worksheet contains a recipe for students to make a loaf of plain white bread. Plain_white_bread.pdf

Curriculum references
Science – KS3
Sc1 1b; 2c, d, e, g, i, j, k, l, n, p
Sc2 1a-e, n
Sc3 2h

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