A cut apple goes brown!
Leave it on the table a while… and it changes color. Why?
The air is full of tiny invisible bits.
bits in the air
juicy apple inside
Cut it open… now the juicy inside is bare.
Tap the apple — let the air bits land on it!
Tap the apple — watch the bits drift over.
Two slices wait together. One is lemon, one is bare. Which one turns BROWN?
Tap your guess!