Set of method cards and supporting PowerPoint for an investigation: behavior of saliva is compared with those for known sample of amylase to demonstrate that saliva contains amylase. Discussion of controls. Because the investigation requires 4 separate experiments to be run; the class needs to be divided into teams; each team carrying out one experiment: a full picture of what the results mean can only be arrived at when the class results are pooled - modeling how professional scientists need to work in teams and communicate their ideas and results.
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