Answers to Questions Kids Ask! - Where "Why?" Turns to "Wow!"
Cut apples turn brown because of a reaction called oxidation. Oxygen in the air reacts with a natural substance in apples called phenolase and turns the cut surface brown. Mild acids like lemon juice can stop this reaction; tossing cut apple chunks with a little lemon juice will keep the apples from turning brown. Vinegar which literally means “sour wine” goes through a fermentation process, which makes it stronger than lemon juice. The key here seems to be the mildness of lemon juice.
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Word of the Dayrealpolitik:
realpolitik: political realism or practical politics.
Born on this dayOctober 21, 2014
1868 - Sir Ernest Dunlop Swinton
1926 - Leonard Rossiter
1940 - Manfred Mann
1940 - Geoff Boycott
1940 - Natalia Makarova
1942 - Sir John Stevens
1954 - Eric Faulkner
1956 - Carrie Fisher
1962 - David Campese
1966 - Bjork
1971 - Jade Jagger