This open ended research project is great for any Apples unit! We began by having the students place sliced apples into different substances to watch the change over time (one week). In my classroom, we used oil, vinegar, air, and water in clear jars. They were able to work as partners to complete this research project as a final aspect of our unit. Let me know if you need anything changed and I will be happy to do so and send you the file.