{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Practice Quiz 10 - 1 The picture above shows a region of...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
1. The picture above shows a region of hard rock about six inches across from the Grand Canyon. The shape and polish of the rock are interesting. It is likely that the rock: A. Was scratched and polished by the hooves of mules carrying tourists into the Canyon along the Bright Angel Trail. B. Was scratched and polished by motion along a fault, which helped open the Canyon so that weathering could lower the Canyon floor. C. Was scratched and polished by the wind, which howls through the Canyon carrying loads of sand eroded from sand bars. D. Was scratched and polished by silt-laden river water, during carving of the Canyon by the Colorado River. E. Was scratched and polished by a glacier, which helped erode the Canyon during the ice age.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
The Canyon was carved by the Colorado River. Glaciers have not been there, and while wind, faults and mule hooves all can change the appearance of rocks, none makes something like this river-polished rock, as we saw in class and you saw in one of the Grand Canyon slide shows. Points Earned: 0/1 Correct Answer: D Your Response: A 2. You start with 400 parent atoms of a particular radioactive type, which decays to give stable offspring. You wait just long enough for three half lives to pass. You should expect to have how many parent atoms remaining (on average): A. 200.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern