Bruised Apple Experimental Investigation

Bruised Apple Experimental Investigation

BRUISED APPLE EXPERIMENTAL INVESTIGATION

B)   AIM
The aim of this experimental investigation was to investigate the effects of air exposure to the apple pieces in different liquids, lemon juice, water, vitamin c, vegetable oil, apple juice and just air.

C) VARIABLES
The independent variables what were changed were the substances in the test tubes. The dependent variables that the group choose to measure were how much discolouration the apple pieces had, what shapes there were, how soft or hard they went and how they felt. The variables what were kept the same were the amount of liquid added, the size of the apple pieces, the environment, and the time they were kept in the test tube.

D) BACKGROUND INFORMATION
For an understanding of this article it is necessary to understand ‘decompose’. The definition of decompose is, to separate into components or basic elements. Decomposition is caused by fungi, bacteria and moulds. Without decomposition the world would be filled up with rotting matter. According to yahoo answers apples bruise because the breaking skin damages some of the apple's millions of cell walls, exposing their insides to the air. Oxygen then mixes with "phenols," a type of chemical compound. An enzyme called polyphenol oxidase (PPO) accelerates the process, creating what is called enzymatic browning. The colour results from the creation of pigments called melanin. While apple-eaters may not like sinking their teeth into the mushy bruised spots, enzymatic browning does serve a purpose, protecting fruit from insects, bacteria, and fungi.

E) PREDICTION
The group predicted that in this bruised apple experimental investigation these things would happen:
    • That the Vitamin C will turn orange like oranges.
    • The lemon juice one will go soft.
    •   The apple juice will stay the same.
    • The air sample will bruise and go hard.
    • The oil sample will go soggy.
    •   The water sample will also go soggy.

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