Thermal and Electrical Conductivity - Presentation

This educational presentation delves into the key concepts of thermal and electrical conductivity, aimed at enhancing students' understanding of conductors and insulators within the realm of Chemistry, specifically focusing on the properties and changes of materials. The presentation sets out learning objectives that include defining conductors and insulators, identifying materials that serve as the best conductors for heat and electricity, and recognising materials that act as insulators. Through interactive questioning, students are encouraged to explore the nature of substances like metals, which are known for their excellent conductivity, and materials such as Indian rubber, which is used for its insulating properties.

The presentation also touches on historical context, recounting how in the early 20th century, the advent of electricity in homes led to safety hazards due to the use of copper wiring and flammable packing materials. This led to the use of insulating materials like Indian rubber to enhance safety. Students are prompted to answer questions that guide them through the properties of thermal conductors and insulators, such as why metals feel colder to the touch and why they are chosen to make cooking pan handles, while materials like wood and plastic serve different purposes based on their insulating abilities. The presentation concludes with an activity where students are tasked to create a PowerPoint presentation, linking the properties of different materials, such as metals, plastic, and wood, to their practical applications and potential drawbacks.