We first talked about why apple brown and discussed the comparison with rusting (oxidation). It is a chemical reaction with the oxygen and an enzyme in the apples. This helped the kids understand why it happened.
How to Do the Apple Experiment:
I already knew the answer to this apple science experiment, but I didn’t want to let my kids know about it. I let them choose various substances from the kitchen to soak the apples in. I did make a suggestion of lemon juice, but let them choose the other things.
The kids chose vinegar, milk and 
I then explained to them that lemon juice helps keep the apple from browning, because it is full of Grab a free printable worksheet from my subscriber library. You can access it by subscribing today! Want more simple science experiments? Check out this big list of Simple Science Experiments for Kids!
Original article and pictures take http://teachbesideme.com/apple-science/ site
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