This lesson is aimed for a double lesson, but can be amended as necessary.
Students recently completed a series of lessons on diabetes. This lesson is a required practical covering food tests. It will be written up in their lab books.This is ‘Required Practical 4’.
LOs: (We are learning …)
• How foods can be classified
• What a positive test looks like for each of the food types
• How to carry out qualitative tests to detect the presence of sugars (Benedict’s Test), starch (Iodine Test), proteins (Biuret Test) and lipids (Sudan III Test)
• To apply key terms in order to write up a scientific investigation; reducing sugars, glucose, starch, positive/negative test result, iodine, biuret, lipids
Ideally for this resource you should have access to Kerboodle. I have not included these worksheets for copyright reasons but you can access these through your school to obtain the differentiated practical sheets. Alternatively, you may use the standard AQA one in their official required practical booklet, freely downloadable on their website.
Credit for the methods and photos to CGP Books, from where the scanned images and answers were obtained.
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