In this demonstration, laser light is bent as it travels through a sugar (or salt) solution of varying concentrations.
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Teacher Demo/Student Activity: Potato Osmosis
Categories: Lab/Student Activity, Teacher Demonstration
Osmosis is the process by which the concentrations of two solutions, separated by a selectively permeable membrane, equalize by the movement of a solvent such as water. This demonstration shows that... read more
GET EXCITED WITH ELECTRICITY! OJ POWERED CLOCK INQUIRY
Categories: General Interest, Teacher Demonstration
Students watch the teacher demonstrate the OJ powered clock. The teacher guides students to wonder what they could change to make the clock work. They do some brainstorming and then the next period,... read more
Teacher Demonstration: Thinking about the Movement of Water
Categories: Teacher Demonstration
The distinction between diffusion and osmosis is not clear to many students. Observing coloured particles (such as food dye) diffuse in water shows direct evidence of diffusion, but the movement of... read more