On Friday the Seventh and Fourth Grades met together to mummify apples. After the apples were peeled, the students carved out faces, weighed their apples, and then covered the apples in a mixture of baking soda and salt. We will revisit the apples in a couple of weeks to weight them again and see what has changed!
What’s happening? Salt and baking soda are desiccants. Desiccants remove 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.