Radioactive_Dating_Worksheet_Answers - Radioactive Dating Worksheet Answers 1 1 When 50 is left it has gone through 1 half-life(1.3 billion years

Radioactive_Dating_Worksheet_Answers - Radioactive...

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Radioactive Dating Worksheet Answers 1. 1 When 50% is left it has gone through 1 half-life (1.3 billion years for K-40) 2. 2 All the C-14 will be gone after approx 50, 000 years; the earth is 4.6 billion yrs old. 3. 3 The half life of a radioactive substance never changes 4. 3 The half life of a radioactive substance never changes 5. 1 C-14 is used to date living things that are 50,000 years old or younger 6. 2 Look at 50% remaining on the Y-axis, follow it over to the line and look down to the X-axis. It will tell you how much time goes by when 50% of the substance is gone. 7. 3 Read the graph the same way you did in #6; just look at 35% instead of 50%. 8. 1 As each half life goes by there is less of the actual substance left; but half of what

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