Browning apple experiment

Tara has had an interest in experiments lately and a fascination about browning fruit so we did a simple little science experiment that she really enjoyed.
She helped cut up two apples and one lemon. We placed the sliced apple onto plates and labeled them "lemon juice" and "no lemon juice". Tara squeezed the lemon juice on the one sliced apple and we waited a day to see the result although she had already had her own hypothesis
Which she proved to be correct. Lemon juice will stop her apple from going brown!