Description

Two weeks ago, you thought about Google as a resource for finding reliable information. This week, we’re going to explore one of my favorite research resources: Google Scholar. Google Scholar provides academic articles that are generally more reliable for information than just a Google search; they will also be harder to understand without background knowledge. You can get to Google Scholar by typing scholar.google.com (Links to an external site.) into your search bar (or by clicking the link).

First, you will watch a video through the library’s streaming services:

  • Select the Library tab on the Canvas course navigation (on the left-hand menu) or google ELAC library to navigate to the ELAC library home page.
  • On the library page, on the left side of the page, you will see a list of resources, like “Find Books and Media”.
  • Click where it says “Streaming Video”.
  • Select “Films on Demand”. Here, you can search a wide variety of topics and find clips from educational videos, or watch entire educational movies.
  • Search “Gem Stone Geology”
  • Select the first video that comes up and watch the clip (4:52).
  • Be prepared to answer the following questions.

Please respond to this prompt with the following information:

Part 1:

After watching this video, you have some background information about how we can use minerals to learn about the history of plate tectonics on Earth. Based on the video, when do scientists think plate tectonics began? Why do they think that?

Part 2:

Use Google Scholar to find a scientific article about this topic.

  • Navigate to Google Scholar and search “diamonds plate tectonics”.
  • Examine the search results. Look for key words in the titles and the short summaries. Do any of the articles look like they might talk about when plate tectonics started?
  • Check out the names and dates of the publications. Science, Geology, Nature, etc. are all reputable, reliable publications. To have your paper published in these magazines, you have to endure rigorous review and editing from fellow experts. And, the more recent the year of publication, the more up-to-date the science will be.
  • Now, look at the names of the authors of the articles. Do you recognize any of them? The third article down, entitled “Start of the Wilson cycle at 3 Ga shown by diamonds from subcontinental mantle (Links to an external site.)” is authored by SB Shirey… that’s the name of the scientist in the video!
  • Click on the link to the right of Shirey’s article where it says “E-Resources at ELAC”. This will take you to a copy of the article. (Or, click on the link above.)
  • What magazine was Shirey’s article published in? What year was it published? Read the abstract of the article. Make a list of words from the abstract that you don’t know. Look up one of these words and define it for your fellow students.

then please respond to the TWO other students posts i will send you with the following content :

You might point out something your classmate said that you hadn’t realized, something they said that impressed you, something you disagree with, something that you think their answer is missing, etc. DO NOT just respond with “I agree”, but also, be POLITE.Aquifer unconfined 2. Vadose zone does not influence drawdown 3. Initial water comes from elastic storage 4. Eventually water comes from gravity drainage 5. Drawdown is negligible compared to saturated aquifer thickness 6. Specific yield is at least 10x elastic storativity 7. Aquifer may be, but does not have to be, anisotropic with radial K different that vertical K + πΎπ‘ŸΞ΄β„Ž π‘ŸΞ΄π‘Ÿ + Ξ΄ 2β„Ž Kv δ𝑧2 = π›Ώβ„Ž Ss 𝛿𝑑 Flow   Steady State  Unconfined  Confined Confined Ξ΄2β„Ž  Ξ΄π‘₯2  + Ξ΄2β„Ž δ𝑦2 = 𝑆 π›Ώβ„Ž 𝑇 𝛿𝑑 two dimensional version of LaPlace’s equation T is transmissivity (T=K*aquifer thickness) Transmissivity and cone of depression  Radial  Confined vs. unconfined  Drawdown https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSkf_nLLhdE7MYbzJ0EdT4JhbyETLMwO5Qd3g&usqp=CAU Cone of depression https://www.blackforestwater.org/uploads/1/2/6/7/126759640/slide6.jpg Storage https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRq61mQJDRDWogCOOAmkbrY4hqJe_qS10RmKQ&usqp=CAU Theis Equation βˆ’ βˆžπ‘’ π‘Ž 𝑄 π‘‘π‘Ž ‫׬‬ 4π𝑇 𝑒 π‘Ž  ho – h =  ho – h =  Used to find transmissivity and storativity 𝑄 4πœ‹π‘‡ W(u) where u = π‘Ÿ 2𝑆 4𝑇𝑑 Theis Equation using well function original Thiem Equation  Thiem equation for a confined aquifer  T=  𝑄 π‘Ÿ ln( 2) 2Ο€(β„Ž2 βˆ’β„Ž1) π‘Ÿ1 Where h is the head at distance r1 (h1) and r2 (h2)from the well  Thiem equation for an unconfined aquifer  K=  𝑄 π‘Ÿ2 ln( ) Ο€(𝑏22 βˆ’π‘12 ) π‘Ÿ1 Where b is the saturated thickness at distance r1 (b1) and r2 (b2)from the well Testing  Next Lecture……

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