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Amaze students with a discrepant event using cooking oil and glass. A test tube immersed in cooking oil seemingly disappears as the tube is filled with cooking oil. Introduce scientific observation, properties of light, reflection, and refraction as students try to explain this modern-day "cloaking device." Kit materials may be used to perform the demonstration multiple times. Includes instructions.
Once students have a firm grasp of the science behind the demonstration, challenge them to find other "disappearing" combinations, using other types of glass, plastics, and oils. This demonstration requires 10 to 15 minutes to complete and discuss.
This demonstration helps teach the following Next Generation Science Standards Student Performance Expectation:
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