Independent and Dependent Variables
Independent Variables
The independent variable involved with this experiment would be the different solutions used for being applied to the surface of the apples. Each of the individual solutions has a different effect on the browning process of the apples, either slowing or quickening the process.
Dependent Variables
The dependent variable would be the amount of time that it takes for the apples to brown depending on the solution which is used. The solution used can either slow down or quicken the reaction
Controlled Variables
- Temperatures of the solutions were all at room temperature to ensure nothing had a faster reaction
- Sizes of the slices of apple
- Amount of solution applied to the surface of the apple
- Area and time in which the experiment was conducted
- Sizes of the slices of apple
- Amount of solution applied to the surface of the apple
- Area and time in which the experiment was conducted
Risk Assessment
Risks involved in this experiment are that there are chances of cutting yourself with knife when cutting the apples, and getting acidic solutions in your eye from the some of the solution.
Reliability and Validity
To ensure the results were reliable the experiment was repeated three times so that none of the results were unusual and to make sure the results were similar. To ensure validity certain variables listed above were controlled throughout all of the three experiments, so that no test had any different solutions or size of apples, which affects apple browning.