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Layered Liquids. Katherine Brooks and Rhana Vickers. Engage. Demonstrate a two-layered liquid “parfait” and discuss why the liquids would stay as 2 separate layers. Explore. Make a prediction about the layers, then measure and record data for four different liquids.
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Layered Liquids Katherine Brooks and Rhana Vickers
Engage • Demonstrate a two-layered liquid “parfait” and discuss why the liquids would stay as 2 separate layers.
Explore • Make a prediction about the layers, then measure and record data for four different liquids. • Calculate densities of the four liquids and relate the densities to the order of layering.
Explain • Ask students to explain their results and compare them to their predictions. • Have students relate the calculated density to the order of the layering. • Ask students to write their own definition of density.
Extend/Expand • Predict the density of a new unknown liquid and the position in the layers. • Discuss density in relation to sinking/floating, gravity in space and on the Moon. • Discuss real-world examples of liquid layers. • Brainstorm careers which involve density.
Evaluate Differentiate or extend • Could students successfully determine the layered position of the fifth liquid, and did they explain how they arrived at their answer?
Resources • Eichinger, John. Activities Linking Science with Math 5-8; NSTA Press, 2009, pgs 89 – 97. • Steve Spangler Science http://www.stevespanglerscience.com/lab/experiments/density-tower-magic-with-science