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Sink and Float - homepages.math.uic.edu
Sink and Float , page 1 of 12 OverviewWhy do some objects sink and others Float inwater? Why can an egg which sinks in water floatif you add a few teaspoons of salt? Why does agreat ocean ship like the Queen Mary Float if it ismade of steel, while a piece of steel sinks? AsPiaget1 pointed out, this question is difficult forchildren to answer because they try to oversimplifythe problem. We saw this earlier when we studiedvolume in Marshmallows vs. Containers. Wenoted then that the children often say the tallestglass has the greatest volume of water, ignoringthe other two dimensions forming the cross-sectional area of the glass. If an object sinks andthe child is asked why, the answer would be asPiaget noted, Because it is heavy.
Sink and Float, page 4 of 12 Liquids other than water are often messy to handle. Karo syrup is an example of a liquid that has its (V, M) line above that for water.
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