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Packet: Absolute Dating The graph below shows the decay of a radioactive material over time. 100- 75 End of first half-life 50 25 10 15 20 Time (x 103 years) 8. How long does it take for this radioactive material to decay through 2 half-lives? 1 x 103 years b. 5 x 109 years 10 x 103 years d. 40 x 103 years a. C. 9. Due to radioactive decay, an igneous rock sample now contains one-fourth of the amount of potassium-40 that it originally contained. The age, in years, of this rock sample is approximately a. 0.7x109 years b. 2.6 x109 years C. 1.3x109 years d. 5.2 x109 years 10. A rock contains uranium-238, which has a half-life of 4.5 x 109 years. If the rock is crushed and heated, the half-life of the uranium-238 it contains will a. increase b. remain the same C. decrease 11. If the amount of carbon-14 in the original sample had been 48 grams, about how much carbon-14 would have been left after 17,100 years? a. 12 grams b. 6 grams C. 3 grams d. 24 grams Radioactive Material Remaining (%)

Packet: Absolute Dating The graph below shows the decay of a radioactive material over time. 100- 75 End of first half-life 50 25 10 15 20 Time (x 103 years) 8. How long does it take for this radioactive material to decay through 2 half-lives? 1 x 103 years b. 5 x 109 years 10 x 103 years d. 40 x 103 years a. C. 9. Due to radioactive decay, an igneous rock sample now contains one-fourth of the amount of potassium-40 that it originally contained. The age, in years, of this rock sample is approximately a. 0.7x109 years b. 2.6 x109 years C. 1.3x109 years d. 5.2 x109 years 10. A rock contains uranium-238, which has a half-life of 4.5 x 109 years. If the rock is crushed and heated, the half-life of the uranium-238 it contains will a. increase b. remain the same C. decrease 11. If the amount of carbon-14 in the original sample had been 48 grams, about how much carbon-14 would have been left after 17,100 years? a. 12 grams b. 6 grams C. 3 grams d. 24 grams Radioactive Material Remaining (%)

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Packet: Absolute Dating The graph below shows the decay of a radioactive material over time. 100- 75 End of first half-life 50 25- 15 20 10 Time (x 103 years) 8. How long does it take for this radioactive material to decay through 2 half-lives? a. 1 x 103 years b.. 5 x 103 years 10 x 103 years d. 40 x 103 years C. 9. Due to radioactive decay, an igneous rock sample now contains one-fourth of the amount of potassium-40 that it originally contained. The age, in years, of this rock sample is approximately a. 0.7x109 years b. 2.6 x109 years C. 1.3x109 years d. 5.2 x109 years 10. A rock contains uranium-238, which has a half-life of 4.5 x 109 years. If the rock is crushed and heated, the half-life of the uranium-238 it contains will a. increase b. remain the same C. decrease 11. If the amount of carbon-14 in the original sample had been 48 grams, about how much carbon-14 would have been left after 17,100 years? a. 12 grams b. 6 grams C. 3 grams d. 24 grams Radioactive Material Remaining (%)
Transcribed Image Text:Packet: Absolute Dating The graph below shows the decay of a radioactive material over time. 100- 75 End of first half-life 50 25- 15 20 10 Time (x 103 years) 8. How long does it take for this radioactive material to decay through 2 half-lives? a. 1 x 103 years b.. 5 x 103 years 10 x 103 years d. 40 x 103 years C. 9. Due to radioactive decay, an igneous rock sample now contains one-fourth of the amount of potassium-40 that it originally contained. The age, in years, of this rock sample is approximately a. 0.7x109 years b. 2.6 x109 years C. 1.3x109 years d. 5.2 x109 years 10. A rock contains uranium-238, which has a half-life of 4.5 x 109 years. If the rock is crushed and heated, the half-life of the uranium-238 it contains will a. increase b. remain the same C. decrease 11. If the amount of carbon-14 in the original sample had been 48 grams, about how much carbon-14 would have been left after 17,100 years? a. 12 grams b. 6 grams C. 3 grams d. 24 grams Radioactive Material Remaining (%)
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