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Technology elegance differentiating mass and density4 for the past month, clarence wilson, a fifth-grade and floating experiments, using the dots-and-containers instructor in a public college within the south bronx, has version of density (see determine 7-2). Been working with colleagues to broaden a unit on in sporting out simulated experiments which include mass and density. The unit combines exploration of those, mr. Wilsonâs students were unfastened to specify the actual-world phenomena related to sinking and the cloth they desired the object and liquid to floating with a conceptual model of density that became be made from, and they might then collect facts from advanced and applied on a pc. They their experiments. The scale of the gadgets changed into held used a software program application called modeling with dots, consistent in these simulations to assist college students awareness which introduced the students to a âdots-and-binsâ on density because the variable. Students were challenged model of density (see parent 7-1). To find out the rule the pc used to determine in step with the version, every field represents a whether or not the object could go with the flow or sink in a given general unit of extent (a size unit, or su), whilst liquidâa rule, regular with reality, that become based totally each dot represented a mass unit (mu). The quantity on the relative densities of the object and the liquid. Of dots consistent with container represented the density (mu/su). In discern 7-2, the item floats. The relative den- hence, each of the gadgets proven had been the equal length: sities of the fabric to the liquid are 1:3, and one- 8 containers, or 8 su. The item on the left weighed 24 third of the item sinks into the liquid. Mass units, even as the object on the right, at 40 mass the unit became meant to last for approximately 15 units, changed into heavier. The density of the object on the study room periods. The students engaged in some right became extra (five mu/su as opposed to three mu/su). Initial baseline sports that involved making the usage of every other kind of software called archimedes, predictions about 16 ordinary gadgets, such as the students were capable of perform simulated sinking a plastic spoon, an apple, and a chunk of graphite. 24 mass gadgets forty mass units information eight size gadgets 8 length gadgets 1/3 of item is in the liquid 3 mu/su 5 mu/su item liquid mass mass 12 mu one hundred twenty mu size length 12 su forty su density density 1 mu/su 3 mu/su determine 7-1 figure 7-2 items represented by using the grid-and-dots version with grid-and-dots illustration of an object floating in a statistics show. Liquid with records show. Mastering from technology investigations 137 .