This demonstration uses food and a series of containers and additives to model the process of mechanical and chemical digestion in the human (mammalian) digestive system. The demonstration begins with actual food items and ends with a paste closely resembling fecal matter. Due to the high “gross” factor, this demo is a hit with students and is guaranteed to be very memorable.
Related Resources:
Safe ON Science Second Edition
Categories: General Interest, Teacher Demonstration
2018 Version – Safe ON Science is STAO/APSO’s safety resource for high school teachers. It is written by STAO/APSO’s Safety Committee, a panel of experienced teachers with a strong background... read more
Teacher Demo/Student Activity: Charging by Contact
Categories: Lab/Student Activity, Teacher Demonstration
In this demo, a polyethylene strip is charged by rubbing with wool. The charged strip is then used to charge a neutral object, a pith ball, by contact. This demo can be done as a student activity. read more
Teacher Demo: Mouldy Bread Demonstration
Categories: Teacher Demonstration
This demonstration shows how water can affect the growth of bread mould. read more