MAGICSA3.MOV is 624 KB.

The third video sequence contains a demonstration not performed by students during the Activity. A test tube is coated first with silicone grease and then Magic Sand. A thin layer of Magic Sand is sprinkled on the surface of water. The test tube can be pushed into the layer of Magic Sand, below the level of the water. The sand on the surface of the water adheres to the sand on the test tube as the tube is pushed below the water surface. When the test tube is removed, the layer of sand falls off.

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