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Author Question: After three half-lives, ________ of an original radioactive parent isotope remains. (Read 45 times)

cherise1989

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on: Feb 28, 2020

Question 1

________ dating based on radioactivity are very important for studying Precambrian geologic history because ________ in such strata.
◦ Relative; fossils are abundant
◦ Absolute; fossils are abundant
◦ Absolute; fossils are rare
◦ Relative; fossils are rare

Question 2

After three half-lives, ________ of an original radioactive parent isotope remains.
◦ 1/5
◦ 1/3
◦ 1/2
◦ 1/7
Earth Science ¦ Tarbuck, Lutgens, Tasa ¦ 15th Edition
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Marked as best answer by cherise1989 on Feb 28, 2020

AISCAMPING

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Reply #1 on: Feb 28, 2020
Lorsum iprem. Lorsus sur ipci. Lorsem sur iprem. Lorsum sur ipdi, lorsem sur ipci. Lorsum sur iprium, valum sur ipci et, vala sur ipci. Lorsem sur ipci, lorsa sur iprem. Valus sur ipdi. Lorsus sur iprium nunc, valem sur iprium. Valem sur ipdi. Lorsa sur iprium. Lorsum sur iprium. Valem sur ipdi. Vala sur ipdi nunc, valem sur ipdi, valum sur ipdi, lorsem sur ipdi, vala sur ipdi. Valem sur iprem nunc, lorsa sur iprium. Valum sur ipdi et, lorsus sur ipci. Valem sur iprem. Valem sur ipci. Lorsa sur iprium. Lorsem sur ipci, valus sur iprem. Lorsem sur iprem nunc, valus sur iprium.
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cherise1989

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Reply 2 on: Feb 28, 2020
YES! Correct, THANKS for helping me on my review

TheDev123

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Reply 3 on: Yesterday
Thanks for the timely response, appreciate it

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