THIS DAY IN SCIENCE: The Beginning Of The End. Manhattan Begins. in 1939

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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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