Table for Individual Question Feedback Points Earned 1010 Correct Answers D 6

Table for individual question feedback points earned

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Table for Individual Question FeedbackPoints Earned:1.0/1.0Correct Answer(s):D
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6.The age of the Earth can be estimated in many ways. Which statement below is most accurate (remember that uniformitarian calculations involve looking at the thickness and type of sedimentary rocks,and similar things, but do NOT include radiometric dating or counting of annual layers)?A) Uniformitarian calculations show that the Earth is about 100 million years old.B) Uniformitarian calculations show that the Earth is more than about 100 million years old, and radiometric techniques tell us how much older.C) Uniformitarian calculations show that the Earth is more than about 100 million years old, and we have no way to estimate how much older.D) Uniformitarian calculations show that the Earth is more than about 1 billion years old.E) Uniformitarian calculations show that the Earth is 4.6 billion years old.Table for Individual Question FeedbackPoints Earned:1.0/1.0Correct Answer(s):B7.One practical radioactive system used to date lava flows involves:Table for Individual Question FeedbackPoints Earned:1.0/1.0Correct Answer(s):D8.You start with 400 parent atoms of a particular radioactive type, which decays in a single step to give a stable offspring, and you start with none of those stable offspring. You wait just long enough for two half lives to pass. You should expect to have how many offspring atoms (on average)(remember that the number of parents and the number of offspring add up to 400, so if you have 10 parents, you have 390 offspring because 10 and 390 add up to 400, and if you have 20 parents you have 380 offspring, and so on):
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  • Spring '99
  • Furman
  • Correct Answer, Individual Question

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