Click on erupt volcano let the simulation run until

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7.Click onErupt Volcano.Let the simulationrun until you reach 1 half-life.What % of theoriginal uranium remains?__50%__.Howmany years did this take?approximately 4.5billion years8.UnderProbe Type, selectCarbon-14andObjects.UnderChoose an Object, selectTree.9.Click onPlant Tree.Let the simulation run until you reach 1 half-life.What % of the originalcarbon remains?58.7% .How many years did this take?5,760 years10. Explain why uranium-238 is used to measure the age of rocks while carbon-14 is used tomeasure the age of the tree trunk?Uranium-238 has a much longer halflife than carbon-14, androcks take much longer to degrade than trees do, therefore we use the material with the longerhalf-life to age the objects that degrade slowly, and vice-versa.11. Click onDating Gametab. There areobjects on the surface and in the fivelayers beneath the surface.There are bothrocks and fossils in each layer.12. Select theCarbon-14detector.Move theGeiger counter to each fossil and recordthe % of original in the table below13. On the ½ life graph, move the green arrowright or left until the % of original matchesthe reading on the detector.Record yourestimated age for each fossil in the table14. Repeat Steps 12 and 13 using the Uranium2-38 detector to estimate the rock ages.For fossilswith no remaining C-14 signal, use the rock ages to estimate fossil ages in the same layer.

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Term
Fall
Professor
ScottJ.Austin

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