In this demo, a polyethylene strip is charged by rubbing with wool. The charged strip is then used to make paper circles stand on their edges inside a Petri dish. This demo introduces students to the charging of materials by induction as opposed to charging by contact.
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
Categories: Teacher Demonstration
The thermite reaction is very exciting, but also extremely dangerous. Iron has a melting point of over 1500C and the reaction can reach temperatures of over 2000C. This reaction was once used to weld... read more