Learning Journal 15 - The Geologic Timescale

Learning Journal 15 - The Geologic Timescale - Links Go...

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Links: Go Question 1 Incorrect 0.00 points out of 1.00 Flag question Question 2 Complete 0.00 points out of 1.00 Flag question My home MEA 101 (003) Fall, 2014 Module 5 Learning Journal 15 ­ The Geologic Timescale QUIZ NAVIGATION Finish review Started on Monday, October 27, 2014, 8:20 PM State Finished Completed on Monday, October 27, 2014, 9:13 PM Time taken 53 mins 7 secs Marks 26.00/28.00 Grade 3.71 out of 4.00 ( 93 %) Put the following three units of time in order from shortest to longest . Select one: a. Era, century, period b. Period, century, era c. Century, period, era d. Era, period, century e. Century, era, period The correct answer is: Century, period, era Pick one of the following early attempts to estimate the age of the Earth and explain in 3­6 complete sentences why it was not accurate. a. Thickness of sedimentary rocks b. Salt accumulation in the ocean c. Cooling rate of a molten Earth You are logged in as Jonathan Kluger (Log out ) MEA 101 (003) Fall, 2014 Geology I: Physical 1 2 3 4 i 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28
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Question 3 Correct 1.00 points out of 1.00 Flag question Question 4 Correct 1.00 points out of The age of a rock is not determined by the cooling rate of molten Earth. Firstly, rocks can have different cooling rates based on their location, not on their age. Second, there is literally no connection between cooling rate and age of a rock, the cooling rate influences the size of the crystals in the rock, not the age. Lastly, contact heating can alter a rock, which would give a different time then the original rock's age. Comment: You are talking about dating rocks, which is how the age of the Earth is determining, but you are not discussing how one of the three methods contributed to inaccurate ages for the Earth. Use the diagram below to describe the relative ages of the rock units and explain how you know.Rock unit A is 90 million years old and rock unit B is 25 million years old.The first one has been done for you.
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