NatureOfScience - Potato Candle Materials One large potato(cooked whole a core remover almonds(1-2 matches Procedure Wash potato and cook it whole in

NatureOfScience - Potato Candle Materials One large...

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Potato Candle Materials: One large potato (cooked whole) a core remover almonds (1-2) matches Procedure: Wash potato and cook it whole in water and salt (about ½ hour) With a core remover, take out a core from the potato (make sure the core is not cracked) Cut a thin sliver from the almond and shape it as a wick Stick the wick on one end of the “candle” (you might want to briefly “smoke” the end of the wick with a lit match) Show the candle to students and ask them to make observations (color, shape, approximate size, etc.) Light the candle and let it burn for a minute or two while students continue to make observations (make sure you blow off the candle before it goes off). Ask the students to make inferences regarding the object that they observed (what it is, what is made of, etc.) Once the class has reached the conclusion that it was really a “candle,” slowly start eating it. Have a class discussion on the reasons why they thought it was a candle and why
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Unformatted text preview: sometimes our observations might be deceptive. Concept illustrated with activity: Although we tend to think that science is based on facts (observations) and thus is objective, our “observations” are influenced by past experiences/knowledge, thus adding subjectivity to the way we perceive things. Scientific knowledge is the result of human activity and as a result is influenced by society’s belief systems. Recall that at some point it was believed that the earth was the center of the solar system and it was also believed the earth was not round. In biology it was once believed that “life” began from nothing; known as the theory of spontaneous generation. Thus, scientific knowledge changes as new tools allow us to better understand and explain natural phenomena. The telescope was a key instrument in the understanding of the universe and the microscope in the understanding of life processes....
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