What do you think will happen to slices of green apple if we put it on a table for more than a month? (if one of your family member doesn't pick it up & eat it) the apple slices will turn a shade of brown, becomes soft, looks wrinkly & maybe smell bad in others words, the apple will rot. So what can we do to maintain an apple's color (in this case green), firmness, shape, & skin that are shiny & smooth? |  | |||||||||||||||||||||||||||||
 I've prepared this, like in the picture, on 17/9/09 & was supposed to open it after 2 weeks of so, but obviously I didn't. I finally did on 21/6/2011. I decided I'm gonna make a new batch later & put it up here in another post. | ||||||||||||||||||||||||||||||
What do you think will happen if we keep apple slices in a container filled with baking powder for more than a month? The baking powder will clumped up while the apple slices will shrink, turn dark brown & becomes very very dry. Container 1 : Apple slices + Baking powder | ||||||||||||||||||||||||||||||
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What do you think will happen if we keep the apple slices in a container filled with salt for more than a month? The apple slices will turn light brown, still firm but watery, thus the shape and size almost the same. There is also a distinct smell & some crystallization at the bottom Container 2 : Apple slices + Salt | ||||||||||||||||||||||||||||||
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What do you think will happen if we keep apple slices in a container filled with baking powder mixed with salt for more than a month? The apple slices will turn brown, slightly dried up on the surface. Feels a bit spongy when we squeeze them. Container 3 : Apple slices + Baking powder + Salt | ||||||||||||||||||||||||||||||
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What do you think is keeping the apple slices firm? The liquid or moisture inside. We can see although plant cells have cell walls, they still need liquid inside of it to maintain its firmness. In Container 1, baking powder absorbed all the moisture in the apple slices & gets clumped up. The cells in the apple slices have lost their moisture, thus they lost their firmness & original shape. Why do you think the apple slices changed color from green to brown? The color changes show that the apple slices has been oxidized by the air. In Container 1, we can see nothing is preventing the apple from being exposed by air, thus the dark brown color whilst in Container 2, salt most of the oxidation from happening (light brown).
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