Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 6, Problem 25QAP
To determine
The older rock among A and B.
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For B and C, the depth is 30.0KM - Not 25 KM !!! Please help!
A rock sample which originally contained 400 grams of radioactive isotope X now contains 25 grams of the material. The half-life of isotope X is 10,000 years. How old is the rock sample? (Give your answer without any punctuation or lables. For example: 15000).
You want to use radiometric dating to determine the age of a specimen. You use Isotope Z, which has a half-life of 645 years. You measure your sample and find that 1/16 of the original amount of Isotope Z is present. How old is the sample?
Chapter 6 Solutions
Understanding Our Universe
Ch. 6.1 - Prob. 6.1CYUCh. 6.2 - Prob. 6.2CYUCh. 6.3 - Prob. 6.3CYUCh. 6.4 - Prob. 6.4CYUCh. 6.5 - Prob. 6.5CYUCh. 6 - Prob. 1QAPCh. 6 - Prob. 2QAPCh. 6 - Prob. 3QAPCh. 6 - Prob. 4QAPCh. 6 - Prob. 5QAP
Ch. 6 - Prob. 6QAPCh. 6 - Prob. 7QAPCh. 6 - Prob. 8QAPCh. 6 - Prob. 9QAPCh. 6 - Prob. 10QAPCh. 6 - Prob. 11QAPCh. 6 - Prob. 12QAPCh. 6 - Prob. 13QAPCh. 6 - Prob. 14QAPCh. 6 - Prob. 15QAPCh. 6 - Prob. 16QAPCh. 6 - Prob. 17QAPCh. 6 - Prob. 18QAPCh. 6 - Prob. 19QAPCh. 6 - Prob. 20QAPCh. 6 - Prob. 21QAPCh. 6 - Prob. 22QAPCh. 6 - Prob. 23QAPCh. 6 - Prob. 24QAPCh. 6 - Prob. 25QAPCh. 6 - Prob. 26QAPCh. 6 - Prob. 27QAPCh. 6 - Prob. 28QAPCh. 6 - Prob. 29QAPCh. 6 - Prob. 30QAPCh. 6 - Prob. 31QAPCh. 6 - Prob. 32QAPCh. 6 - Prob. 33QAPCh. 6 - Prob. 34QAPCh. 6 - Prob. 35QAPCh. 6 - Prob. 36QAPCh. 6 - Prob. 37QAPCh. 6 - Prob. 38QAPCh. 6 - Prob. 39QAPCh. 6 - Prob. 40QAPCh. 6 - Prob. 41QAPCh. 6 - Prob. 42QAPCh. 6 - Prob. 43QAPCh. 6 - Prob. 44QAPCh. 6 - Prob. 45QAP
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- An expert already gave me the answers but I don't understand that. Now I just need the numberd that goes in the box. The outer cour and innerarrow_forwardA radioactive nucleus has a half-life of 5108 years. Assuming that a sample of rock (say, in an asteroid) solidified right after the solar system formed, approximately what fraction of the radioactive element should be left in the rock today?arrow_forwardAll I need help with is to find the outer core and inner core percentage and the thinkness of them too.arrow_forward
- e A-Classilying x upp.acceler atebaming.com/ studenta ssignments/14358 * ALI Globel Login A Classes 6 Hitchcock ISD O Student Assignmen. X Welcome to Edgen. y for Stude G google cla ssroom- Save Larger rocks are slowly eroded away by the elements on Earth. Question 3 A metamorphic rock can also be thought of as a rock that changes. What causes the rock to change? Layers of sediment building up over time and pressing down, forming rock. Rain, wind, freezing, thawing, and plant roots growing cause the rock to erode away, leaving behind sediments. Extreme heat and pressure from deep within Earth cause changes to the rock's appearance, structur and composition. The rock slowly changes into a new rock over time. Qestion4 Based on the context in paragraph 4, fossil refers to how igneous rocks were formed over time the remains of dead plants and animals settle to the bottom of an ocean or lake and are covered by mud a trace or print, or the remains of a plant or animal of a past age preserved…arrow_forwardA fossil contains 4.06 grams of carbon 14. Refer to the formulaA(t) = C 0.999879t which gives the original amount of carbon 14 t years ago in terms of the amount C that is left now, and estimate the amount of carbon 14 in the sample 10,000 years, 20,000 years, and 30,000 years ago. (Round your answers to one decimal place.arrow_forwarda parent isotope has a half-life of 500,000 years. if a rock contained 10mg of the parent isotope when it formed, how much parent isotope would be left after 1.5 million years?arrow_forward
- Which is evidence that supports the dynamo theory? A) Earth's outer core contains liquid that conducts electricity B) Earth's core contains a large amount of iron C) Granite and basalt conduct electricity D) Convection occurs in Earth's inner corearrow_forwardCarbon-14 is constantly being produced in the upper atmosphere, and the amount is in equilibrium. As long as an organism is alive, it keeps its carbon isotopes in balance with the atmosphere, but at soon as it dies, it stops taking up new 14C, and so the geologic clock starts. You found a shell buried in sedimentary layers, which has 6% of its original 14C left. Determine the age of the shell. Show your work.arrow_forwardYou analyze a sample of a meteorite that landed on Earth and find that 7/8 of the uranium-238 radioactive atoms have decayed into lead-206. What is the age of the sample (in years) if the half-life of uranium-238 is 4.5 billion years?arrow_forward
- Another piece of the Canyon Diablo Meteorite has been found. Its volume is 84,771 mL. Assuming it has the same density as the smaller fragment discussed in class [insert density here à ], does the mass of this bigger piece more closely resemble the mass of an adult male lion (about 180 kg), a dairy cow (about 640 kg), or a killer whale (about 900 kg)?arrow_forwardA sample from a meteorite that landed on Earth has been analyzed, and the results shows that out of every 1,000 nuclei of potassium- 40 originally in the meteorite, only 125 are still present, meaning they have no yet decayed. How old is the meteorite (in yr)? (Hint: see the figure below) (Note: The half life of potassium- 40 is 1.3 billion years.) _______ yrarrow_forwardRock B was found to contain 6 atoms of a parent isotope and 94 atoms of its daughter isotope. If the half-life of the parent- daughter isotope pair is 2 million years, what is the absolute age of Rock B? Parent atoms remaining 100 94 atoms 87 atoms 80 75 atoms 60 50 atoms 40 25 atoms 13 atoms 6 atoms 1 2 3 4 Number of half-lives (Elapsed time) 2 million years old 4 million years old 6 million years old 8 million years old 94 million years old LO 20 Number of atoms (percent)arrow_forward
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