A newly formed a rock has 96 ug per kg of a radioactive element An ancient

A newly formed a rock has 96 ug per kg of a

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12. A newly formed a rock has 96 ug per kg of a radioactive element. An ancient sample of the same rock has 3 ug per kg of that same radioactive element. If the half-life of this element is 15 million years how old is the ancient rock? a.10 million years old b.20 million years old c.50 million years old d.75 million years old 13. Using the diagram below and the provided information, how old is the rock layer labeled with the star? (A dike is the named used for a magma flow that cools before reaching the surface) 14. Which of the following is the best line of evidence supporting the most widely accepted theory regarding the origin of mitochondria? 15. Which of the following describes conditions in the prebiotic earth compared to earth today? 16. Which of the following were the first “self-replicating entities” on earth? a.RNA molecules b.DNA molecules c.Viruses d.Bacteria e.Single-celled eukaryotes
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For the following events select both a date and a line of evidence that supports that date. 17. Origin of Universe A, D 18. Great Oxygenation Event C, A 19. Origin of Complex Animals B, C a. Dramatic increase in the oxides found in sedimentary rocks b. Direct radioactive dating of oldest igneous rocks c. Relative dating of fossils in sedimentary rocks d. Rate at which the stars are moving away from us e. Carbon dating of non- fossilized organic matter
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