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Testing the “5 Second Rule”

Instructor shows students petri dish

Would you eat food that you dropped on the floor if you picked it up in less than five seconds? People call it “the five second rule” but is it true or false?

 

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A student placing a taste test sample in their mouth.

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lemon battery

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A kid and an instructor standing in a stream and conducting scientific observations.

Can you tell if a stream is healthy?

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Casts made from prehistoric skulls of human ancestors on display.

Finding relatives in hominin skulls

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Instructor holding a pizza box, aluminum foil, and other items to make a solar oven

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Several young students putting their hands in a mixture of corn starch and water

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Science U students

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