21ST CENTURY ASTR.:STARS..(LL)-PACKAGE
6th Edition
ISBN: 9780393448450
Author: Kay
Publisher: NORTON
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Chapter 8, Problem 17QP
To determine
Whether it is possible to date all rocks with radiometric method.
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You are dating rocks by their proportions of parent isotope potassium-40(half life 1.25 billion years) and daughter isotope argon-40.
Find the age for a rock that contains 3 times as much Argon-40 as potassium 40.
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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…
XRD and XRF use X-rays to determine the type of mineral and the elemental composition of a mineral, respectively. They both also use the equation known as Bragg's Law. What is the difference between how you use Bragg's Law in the two techniques? (hint: which variables in the equation are known and which unknown in each case?)
Chapter 8 Solutions
21ST CENTURY ASTR.:STARS..(LL)-PACKAGE
Ch. 8.1 - Prob. 8.1CYUCh. 8.2 - Prob. 8.2CYUCh. 8.3 - Prob. 8.3ACYUCh. 8.3 - Prob. 8.3BCYUCh. 8.4 - Prob. 8.4CYUCh. 8.5 - Prob. 8.5CYUCh. 8.6 - Prob. 8.6CYUCh. 8 - Prob. 1QPCh. 8 - Prob. 2QPCh. 8 - Prob. 3QP
Ch. 8 - Prob. 4QPCh. 8 - Prob. 5QPCh. 8 - Prob. 6QPCh. 8 - Prob. 7QPCh. 8 - Prob. 8QPCh. 8 - Prob. 9QPCh. 8 - Prob. 10QPCh. 8 - Prob. 11QPCh. 8 - Prob. 12QPCh. 8 - Prob. 13QPCh. 8 - Prob. 14QPCh. 8 - Prob. 15QPCh. 8 - Prob. 16QPCh. 8 - Prob. 17QPCh. 8 - Prob. 18QPCh. 8 - Prob. 19QPCh. 8 - Prob. 20QPCh. 8 - Prob. 21QPCh. 8 - Prob. 22QPCh. 8 - Prob. 23QPCh. 8 - Prob. 24QPCh. 8 - Prob. 25QPCh. 8 - Prob. 26QPCh. 8 - Prob. 27QPCh. 8 - Prob. 28QPCh. 8 - Prob. 29QPCh. 8 - Prob. 30QPCh. 8 - Prob. 31QPCh. 8 - Prob. 32QPCh. 8 - Prob. 33QPCh. 8 - Prob. 34QPCh. 8 - Prob. 35QPCh. 8 - Prob. 36QPCh. 8 - Prob. 37QPCh. 8 - Prob. 38QPCh. 8 - Prob. 39QPCh. 8 - Prob. 40QPCh. 8 - Prob. 41QPCh. 8 - Prob. 42QPCh. 8 - Prob. 43QPCh. 8 - Prob. 44QPCh. 8 - Prob. 45QP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- What are the three conditions for using an isotope in a rock to date that rock?arrow_forwardHow does physics apply to these geological processes (volcanic eruptions, mountain formation, deposition)? Please explain.arrow_forwardThe IUGS uses percentage of minerals to classify the igneous rocks. Provide the assumptions used that leads to the usage of mineral percentages used for plotting ternary diagrams.arrow_forward
- Which of the following heating mechanisms is still producing fresh heat inside the Earth? a radioactivity b bombardment c compression d differentiationarrow_forwardYou have made magnetic field measurements near some thick lava flows at 60° N, 90° W. The inclination of the lava’s magnetization is 26. The determined paleolatitude at which the lava cooled is 13.71°. Given the origin of the samples, where would you prefer to sample?arrow_forwardWhat percentage of Earth's volume is the metallic core? Note: The volume of a sphere is 4 3 πr3. Assume the Earth has a radius of 6.38 103 km, and the core has a radius of 3.51 103 km. ........%arrow_forward
- Describe how we use radioactive elements and their decay products to find the age of a rock sample. Is this necessarily the age of the entire world from which the sample comes? Explain.arrow_forwardWhat biologic event is used by geologists to separate the Tertiary period from the Quaternary period?arrow_forwardMetamorphic rock shows that only 25% of its original potassium-40 remains. What is the minimum age of the rock? The half-life of K-40 is 1.3 billion years.arrow_forward
- Suppose that one species of index fossil lived between 410 and 380 mya and another lived between 440 and 350 mya. What can be said about the age of a rock that contains fossils of both species? Figure 24.22 Absolute Dating of Sedimentary Rocks See Exercise 7.arrow_forwardFor B and C, the depth is 30.0KM - Not 25 KM !!! Please help!arrow_forwardA 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).arrow_forward
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