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.
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EXAMINING MEDICAL HOT AND COLD PACKS USING COFFEE-CUP CALORIMETRY (SCH4U)
Categories: Lab/Student Activity, Lesson Plan
Physical changes that involve liquids and aqueous solutions can be studied using a polystyrene calorimeter like the one shown in Figure 1. Such materials can be applied to practical thermochemical... read more
Teacher Demo: Photosynthesis and Respiration: Complementary Processes
Categories: Teacher Demonstration
The cells of green plants contain the pigment chlorophyll in organelles called chloroplasts. Chloroplasts capture the Sun’s energy and store it―through photosynthesis―as chemical energy. The... read more
Teacher Demo: Sock Mitosis
Categories: Teacher Demonstration
This demonstration is a great way for students to model the stages of mitosis. Images of the different stages in textbooks are static snapshots and many students have difficulty grasping the idea... read more