Which Grape is Heavier?

Floating grape

Students should already have had some previous experiences with solids and liquids.  This activity allows the students a chance to observe buoyancy and interactions of solids with liquids.  They can investigate and describe the properties of density, as well as adhesive/cohesive forces. The usage of common table foods creates high interest.

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Seven Layer Density Column

density column spanglerBy Steve Spangler

Stack seven different liquids in seven different layers. Anyone can stack blocks, boxes, or books, but only those with a steady hand and a little understanding of chemistry can stack liquids. What if you could stack seven different liquids in seven different layers? Think of it as a science burrito! Continue reading