Modified Mastering Physics with Pearson eText -- Standalone Access Card -- for Conceptual Integrated Science
3rd Edition
ISBN: 9780135213339
Author: Hewitt, Paul, Suchocki, John, LYONS, Suzanne, Yeh, Jennifer
Publisher: PEARSON
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Textbook Question
Chapter 23, Problem 7RAT
Why does the iridium layer in the rock record sug-
gest that an asteroid impact triggered the Cretaceous
extinction?
(a) | Iridium, like "shocked quartz," is a metamorphic rock that displays a high degree of metamorphism. |
(b) | Iridium can be subjected to radiometric dating. |
(c) | Iridium is a product of soot |
(d) | Iridium is rare on Earth but common in asteroids, and the layer was deposited at the time of the Cretaceous extinction. |
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Check out a sample textbook solutionStudents have asked these similar questions
Using the same dating method (U235 and Pb207), the amount of Pb207 found in layer H is 75% and the amount of U235 found in layer I is 50%. For at least how many million years had the layer H been exposed on the surface to receive weathering and erosion before layer I started to form?
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each volcano became extinct, the scientists calculated the age of the youngest layer of igneous rocks on each island. After a
recent research trip, the identifying tag of a sample rock was lost. The scientists ask you to help identify the sample rock's
parent volcano.
The scientists give you some information.
1) The initial ratio of strontium-87 to strontium-86 in the rock was 0.7129.
2) The decay constant, 1, for rubidium-87 is 1.42 x 10-1!.
3) The current isotope concentrations in the rock are 8" Sr = 126 ppm, 8'Rb = 218 ppm, and 8ºSr = 175 ppm.
%3D
Use the isochron equation to calculate the approximate age of the mystery rock.
87.
Sto +
87
Sr
[edr – 1]
86
Sr,
86
86
Where possible, retain at least four significant figures throughout your calculations, and round your final answer to the nearest
100 million years.
million years
t =
Chapter 23 Solutions
Modified Mastering Physics with Pearson eText -- Standalone Access Card -- for Conceptual Integrated Science
Ch. 23 - Diamond and graphite are minerals made of 100...Ch. 23 - Are plastic and nylon minerals?Ch. 23 - Describe the microscopic structure of a mineral.Ch. 23 - Is glass a mineral? Why or why not?Ch. 23 - What is the chemical formula for rubies? Why are...Ch. 23 - Identify six or more properties of minerals.Ch. 23 - How does the hardness of a mineral relate to its...Ch. 23 - Why is it rare to see large mineral crystals in...Ch. 23 - How many minerals are known to exist? What are the...Ch. 23 - Which is the largest group of minerals? What is...
Ch. 23 - Which are more common in Earths crust and mantle-...Ch. 23 - Identify seven classes of nonsilicate minerals.Ch. 23 - List four ways that minerals can form.Ch. 23 - A rock deep in Earth has a temperature higher than...Ch. 23 - When can the rock described in Exercise 14 melt to...Ch. 23 - Name an example of an evaporate mineral that you...Ch. 23 - Earths crust is made of rocks, so why dont we see...Ch. 23 - When cant we see the crystals in rocks?Ch. 23 - Do rocks have chemical formulas? Why or why not?Ch. 23 - What are the three major categories of rock?Ch. 23 - What is the difference between extrusive and...Ch. 23 - Why are most igneous rocks very hard?Ch. 23 - Prob. 23RCCCh. 23 - What is another name for intrusive igneous rocks?...Ch. 23 - Describe the process by which sedimentary rocks...Ch. 23 - Prob. 26RCCCh. 23 - How do clastic rocks differ from chemical rocks?Ch. 23 - What portion of the rock at Earths surface is...Ch. 23 - Heat and pressure can make one rock change, or...Ch. 23 - What kinds of rocks can undergo metamorphism?Ch. 23 - What are the stripes in foliated metamorphic rocks...Ch. 23 - The metamorphosis of shale into slate is an...Ch. 23 - Are rocks permanent features of Earth? Explain?Ch. 23 - How are all rocks related to one another?Ch. 23 - Five basic processes occur in the rock cycle. Name...Ch. 23 - What do all of the most common minerals in Earths...Ch. 23 - In what way is the silicate tetrahedron like a...Ch. 23 - What two elements make up the silicon tetrahedron?Ch. 23 - How are olivine, augite and feldspar alike? How...Ch. 23 - How is coal unlike other sedimentary rocks?Ch. 23 - Describe the formation of coal.Ch. 23 - What is coal made of?Ch. 23 - In what way are coal and petroleum alike?Ch. 23 - Prob. 44TISCh. 23 - Prob. 45TISCh. 23 - Prob. 46TISCh. 23 - Concrete is made from sand, gravel, and cement...Ch. 23 - a What is the average temperature of Earths...Ch. 23 - How does the atomic structure of glass differ from...Ch. 23 - The chemical formula for quartz is SiO2. Coesite...Ch. 23 - Toothbrushes and toothpastes usually consists of...Ch. 23 - Minerals in Earths crust generally do not contain...Ch. 23 - The chemical formula for quartz is SiO2. What is...Ch. 23 - Why do some high-quality drills have diamond tips?Ch. 23 - Why are quartz and diamond so much harder than...Ch. 23 - Name two properties of minerals that are based on...Ch. 23 - Prob. 59TECh. 23 - Why are the ferromagnesian silicates often dark,...Ch. 23 - What is more plentiful on Earththe group of...Ch. 23 - Olivine and augite are ferromagnesian silicates....Ch. 23 - Classify the following minerals as oxides,...Ch. 23 - The drawing shows two silicate tetrahedra linked...Ch. 23 - The chemical formula for the calcium-rich variety...Ch. 23 - Refer to figure 23.15b, which shows the structure...Ch. 23 - Why should mines be air-conditioned?Ch. 23 - One of your friends thinks that all mining should...Ch. 23 - Earths mineral resources are plentiful, but once...Ch. 23 - Prob. 70TECh. 23 - You have a tiny pile of quartz grains. You cover...Ch. 23 - Prob. 72TECh. 23 - Complete this sentence and explain your answer:...Ch. 23 - A geologist finds an igneous rock that has large...Ch. 23 - Why do rocks from slowly cooling magma have large...Ch. 23 - Prob. 76TECh. 23 - Why are intrusive igneous rocks coarse grained?...Ch. 23 - How is the magma that crystallizes to make...Ch. 23 - How can one magma body produce many different...Ch. 23 - Prob. 80TECh. 23 - Which of the three classes of rocks is formed at...Ch. 23 - Prob. 82TECh. 23 - Cycles in nature, such as the rock cycle, consist...Ch. 23 - Prob. 84TECh. 23 - Is the following rock a sedimentary rock, igneous...Ch. 23 - How is bituminous coal like coquina? How is...Ch. 23 - How is coal special among rocks?Ch. 23 - Prob. 88TECh. 23 - Prob. 89TECh. 23 - Why are metamorphic rocks formed underground?Ch. 23 - Prob. 91TECh. 23 - Metamorphism can be caused by pressure, heat, or...Ch. 23 - Cycles in nature, such as the rock cycle, consist...Ch. 23 - Identify a natural cycle other than the rock...Ch. 23 - If the 4.6-billion-year history of Earth were...Ch. 23 - A road cut reveals sedimentary strata. A low-lying...Ch. 23 - You read in the newspaper that a certain rock...Ch. 23 - The silicates are the largest mineral group...Ch. 23 - What physical change in metamorphic rock signals...Ch. 23 - Why do some minerals break down into cubes when...Ch. 23 - Which of these does not belong in your mineral...Ch. 23 - Which statement best describes how the majority of...Ch. 23 - Large crystals are usually associated with a...Ch. 23 - Why does the iridium layer in the rock record sug-...Ch. 23 - Prob. 8RATCh. 23 - Conglomerate is a sedimentary rock that consists...Ch. 23 - An igneous rock can be transformed into a...
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