21ST CENTURY ASTRONOMY (LL)W/SMARTWORK5
6th Edition
ISBN: 9780393675566
Author: Kay
Publisher: NORTON
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Chapter 8, Problem 13QP
To determine
The reason for Earth was once completely molten.
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12. Which part of the earth makes up about one-third of earth’s total mass and is mostly iron witha solid part and a part that acts like a liquid?A. mantle
B. core
C. crust
D. asthenosphere
11. Which part of the Earth is a hot, elastic semi-liquid layer that extends around the entire Earth?A. crust
B. core
C. mantle
D. asthenosphere
1. Which of the following STILL significantly heats the Earth's interior?
a.
bombardment
b.
compression
c.
radioactivity
d.
differentiation
2. Both the Moon and Mercury have
a.
volcanic craters only
b.
impact craters only
c.
some volcanic and some impact craters
Chapter 8 Solutions
21ST CENTURY ASTRONOMY (LL)W/SMARTWORK5
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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- A rift valley is evidence of which kind of plate boundary? A. convergent B. divergent C. transform D. uniform O A O B Ос O Darrow_forward15. If the incident angle is 45 degrees and the seismic velocity in the first medium is a reasonable value for sediments, and the seismic velocity in the second medium is 4 times slower than in the first medium, then the refracted angle a. Is less than 45 degrees. b. Is more than 45 degrees. c. Is 45 degrees. d. Cannot be determined given this information. 16. Assume that the earth is represented by a horizontal layer overlying a half-space. A simplest refraction survey with minimum instrument requires one shot and one geophone b. one shot and two geophones c. one shot and three geophones d. two shots with two geophones 17. You carried out a single-shot seismic reflection survey to find the depth to the basement and the velocity structure. Exact knowledge about the material above the basement and the shape of the basement interface was not known. After carrying out the survey he picked out the first arrivals and plotted the T-X graph as below. What conclusion can you make? a. he can…arrow_forward1. A giant ice sheet expands quickly over the surface of North America. For how long must the ice sheet remain in place in order to cool the crust to a depth of 2000 m? The thermal diffusivity of crustal rocks is ~ 10-6 m²/s. Give your answer in years.arrow_forward
- 13. How deep in the crust is 10 kbar? Lithostatic pressure within the crusts results from the weight of the rocks above. Assume an average density of 2750 kg/m3. Use the equation P=p*g*h or P/(p *g)=h 23kPa/m P=pressure (e.g. kbar), p=density, g-gravity 9.8 m/s2, h= depth (m), 1 kbar=1,000 bars, 1 bar=100,000 Pa, 1 Pa=kg/(m*s2), 1 kbar =100,000,000 Pa, 1 km =1000 m. Give your answer in kilometers.arrow_forwardSuppose earthquake A registers two more points on the Richter scale than earthquake B. a. How are their corresponding intensities related? b. How are their released energies related? a. Select the correct choice below and, if necessary, fill in the answer box to complete your choice. O A. A = IB + O B. A = Oc. 'A ='B O D. IA = lB -arrow_forwardIf we pushed the Earth closer to the Sun, it would develop a thick, CO2-rich atmosphere like Venus. All of that CO2 would come from the Earth's a. sea floor after the oceans evaporate b. mantle after the crust melts c. volcanic eruptions which would become more frequent d. polar regions after the ice caps meltarrow_forward
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