Radioactive_Dating_Worksheet_Answers.doc - Radioactive...

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Radioactive Dating Worksheet Answers1.1When 50% is left it has gone through 1 half-life (1.3 billion years for K-40)2.2All the C-14 will be gone after approx 50, 000 years; the earth is 4.6 billion yrsold.3.3The half life of a radioactive substance never changes4.3The half life of a radioactive substance never changes5.1C-14 is used to date living things that are 50,000 years old or younger6.2Look at 50% remaining on the Y-axis, follow it over to the line and look down tothe X-axis.It will tell you how much time goes by when 50% of the substance isgone.7.3Read the graph the same way you did in #6; just look at 35% instead of 50%.8.1As each half life goes by there is less of the actual substance left; but half of what
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Term
Fall
Professor
John Harper
Tags
Biology, Radioactive Dating, Radioactive Decay, Half Life, Work, 4 5 billion years, 1 3 billion years, 000 years, 5 700 years

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