In this demonstration, a peeled potato is cut into the form of a candle and an almond slice is used as the candle’s “wick.” The teacher lights the almond slice on fire and it burns. The students see the object, and make observations about it. Then the teacher blows the flame out and allows the students to get a closer look at the “candle.” This demo is an excellent way of explaining the difference between “observations” and “inferences.”
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Teacher Demo/Student Activity: Charging by Contact
Categories: Lab/Student Activity, Teacher Demonstration
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. read more
Teacher Demo: The Importance of Safety Goggles
Categories: Teacher Demonstration
Although all students know that it is essential to wear safety goggles during many science investigations, it can be helpful to provide a powerful demonstration showing why this is so important. This... read more
Teacher Demo: Mouldy Bread Demonstration
Categories: Teacher Demonstration
This demonstration shows how water can affect the growth of bread mould. read more