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Science Investigation

Is it safe to eat?

See below for method document

Children investigate the ‘five-second rule’ and whether food is ever safe to eat after being dropped on the floor.

Children work in groups to test a single food type. They wear disposable gloves to prepare four pieces of food then put the first piece to one side as the ‘control’. They drop the other three pieces on the floor, picking one up immediately, another after five seconds and the last piece after 10 seconds. The children seal all pieces inside separate, labelled sandwich bags. Observing the pieces over time, children record any changes and use the results to decide whether there is any truth to the five-second rule.

Microorganisms instantly stick to food that they come into contact with. Scientists believe that we should never eat food that has been on the floor.