Mummified Apples!

What ghastly science is going on in year 4?The science of using chemicals to prevent the growth of moulds and bacteria, that’s what!

Left to the natural processes, our untreated control apple is looking a little worse for wear. After just one week, mould can be seen as blackness and fur. That’s because moulds and bacteria are getting to work, returning the once-living apple back to the earth.

But contrast this rather grim-looking apple with the one treated with chemicals… …

Although there is browning of the apple, this is the process of oxidation, not rotting. There is no evidence of mould or bacteria on the treated apple!


The control apple after one day.


The control apple after one week.


The apple treated with chemicals.

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