Why Do Apples Turn Brown? | Kitchen Science for Kids
Why do apples turn brown after taking a bite? Discover the kitchen science of fruit enzymes, oxidation, and fun homeschool STEM food experiments for kids.
Beneath the smooth, crunchy skin of a fresh apple sits a secret squad of invisible enzyme guards waiting on standby. The second a knife slices or teeth crunch through the flesh, air rushes in—and the fruit sounds the alarm. Tiny chemical protectors named polyphenol oxidase scramble to build a quick melanin shield across the open cells, racing to keep germs and drying air out. What looks like an unappetizing brown smudge in your lunchbox is…
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