materials:
- 6 identical bowls
- measuring jug
- chopping board
- knife
- 1 large red apple
- digital camera
- paper and pencil/pen to record observations

ingredients:
- 400 ml of tap water
- 200 ml of extra virgin olive oil
- 200 ml of white vinegar
- 200 ml of lemon juice
- a pinch of salt

step one:
mix the salt with only 200 ml of the water. make sure that the solution is combined well and that most of the salt has been dissolved.

step two:
remove the core of the apple and cut the apple into 6 identical pieces

step three:
pour the salty water, the vinegar, the oil, the lemon juice and the remaining 200 ml of the tap water into five separate bowls.

step four:
place one of the six pieces of apple in each of the five bowls. make sure that each apple is fully and completely covered by the mixture in the bowls. place the last, remaining piece of apple in the empty bowl. this apple will remain at room temperature for the experiment.

step five:
after every hour check, the progress of the apple and how it looks. take notice of how brown the apple is, how much time has elapsed and what substance the apple is lying in. take pictures and record observations.

step six:
after 8 hours, record the final observations and remove apples from the mixtures they are lying in. the experiment has now stopped. clean all the materials used and make sure that they are dried well for next time the experiment is repeated.

step seven:
repeat the experiment 2 more times. record results and then get an average of all of the three results.