In this demo, a polyethylene strip is charged by rubbing with wool. The strip is then used to test what happens to the flow of charge when the strip is placed in contact with a conductor (iron nail) and the materials are then moved towards a neutral object. An extension to the demo enables students to test what happens when an insulator (eraser) is used in place of the conductor (iron nail).
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Teacher Demo/Student Activity: Disappearing Volume
Categories: Lab/Student Activity, Teacher Demonstration
In this activity, students mix a given quantity of salt with a fixed volume of water. Mass and volume measurements are made before and after mixing to determine if these quantities change. Students... read more
Teacher Demo/Student Activity: Limit to Cell Size
Categories: Lab/Student Activity, Teacher Demonstration
Cells require a constant supply of glucose and oxygen to produce energy. Cellular respiration occurs in the mitochondria of a cell. As a result of this process, large quantities of waste carbon... read more
THE CARDBOARD CHAIR CHALLENGE (GRADE 7)
Categories: Lab/Student Activity, Lesson Plan
In this project, students will apply their understanding of the structures unit to create a piece of cardboard furniture that is designed to suit the needs of a member of your school community. read more