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.”
Related Resources:
Teacher Demo/Student Activity: Bending Water
Categories: Lab/Student Activity, Teacher Demonstration
In this demo, a polyethylene rod is charged by rubbing with wool. The charged rod is then used to bend a stream of water flowing from a tap. Different substances have different attractions for... read more
Teacher Demo: Bending Light - Part II
Categories: Teacher Demonstration
In this demonstration, laser light is bent as it travels through a sugar (or salt) solution of varying concentrations. read more
Teacher Demo: Marshmallow DNA Model
Categories: Teacher Demonstration
This demonstration will provide students with a visual representation of the structure of DNA. Students will learn the different components that make a nucleotide, the correct base-pair connection... read more