scinetific enquiry y7
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Apple contain high amount of iron.Oxidation :when iron reacts with oxygen in
air it turns its colour .Also apple contain fibers but it has
nothing to do with the change in colour .Apples of different colours do the same
change in colour.
When the apple is exposed to air its color changes as oxygen in air reacts with the iron it has and this is called oxidation.
Prediction
Acids can protect the apples from changing its colour.
Examples for acids :lemon and vinegar.Examples for bases : milk of magnesia
and soda.
Results
The apples in lemon only are the ones who did not change in color ,even the ones in vinegar changes it’s color.
So ,it has nothing to do with acid and may be there is another thing in lemon which protects the apple
Hypothesis
Acids can protect the apples from changing its color.
Examples for acids :lemon and vinegar.Examples for bases : milk of magnesia
and soda.(Which is a prediction which can be
tested).