This week our apples were looking really shrivelled! The salt had become really hard and we had to crack it with a spoon to scoop the apple out! It looked like there was very little moisture left in the apple and the skin was extremely bumpy and wrinkled. There was absolutely no smell. There was no mould. We will look at our apple one last time next week.

Salt is a desiccant. A desiccants removes  water from any material it comes into contact with. Bacteria that cause rotting and decay need water to survive. Salt and baking soda remove the water from the apple, which makes it hard for bacteria to survive and cause decay.
Ancient Egyptians use a similar method to preserve human bodies after death. They used natron, a naturally occurring dessicant, to mummify bodies