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Science resources, KS3 and KS4 following the AQA trilogy specification
KS4 - Diffusion
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KS4 - Diffusion

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Diffusion powerpoint including exchange of gases and relating to surface area. Also includes factors that affect the rate of diffusion
KS4 - Aseptic technique
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KS4 - Aseptic technique

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A work sheet for completing the practical where students make an uncontaminated bacterial culture using aseptic technique. Triple Biology ONLY AQA. Variables, method and questions.
Bacterial flow chart
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Bacterial flow chart

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A fun activity where students use the flow chart to investigate different types of bacteria. They should all start with the top question using the descriptions on the table to answer the questions. Each description refers to a type of bacteria that the students find the name of and then predict what the bacteria will look like.