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2/23/22, 5:53 PM Laboratory 3B: Mineral Identification: ESS 101 B Wi 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1515924/quizzes/1604215 1/26 Laboratory 3B: Mineral Identification Due Jan 30 at 11:30pm Points 14 Questions 19 Available Jan 21 at 9am - Jan 30 at 11:30pm 10 days Time Limit None Allowed Attempts 2 Instructions This quiz was locked Jan 30 at 11:30pm. Attempt History Attempt Time Score LATEST Attempt 1 47 minutes 14 out of 14  Answers will be shown after your last attempt Score for this attempt: 14 out of 14 Submitted Jan 28 at 5:42pm This attempt took 47 minutes. ATTENTION : You must complete Laboratory 3A: An Introduction to Minerals BEFORE you complete this lab. Lab 3A will teach you about the characteristics we use to describe minerals. Lab 3B will have you use the characteristics to identify minerals. If you do not first complete Lab 3A, Lab 3B will be difficult/impossible. Terry has filmed a video (see below) that will introduce you to mineral identification techniques used in this lab to classify 14 unknown mineral specimens. 1x 0:00 26:21 This lab guides you through identifying 14 common minerals. We have given you 2 attempts. This means that you can submit the whole quiz up to 2 times. You should answer all the questions about each mineral before you submit the first time. Then, you should receive feedback about which questions you got wrong and can go over the questions with your T.A. during your weekly discussion session. Then you can complete the 2nd attempt to correct previous errors. NOTE : Canvas appears to autosave your answers to the quiz. If you've made progress and need to take a break for whatever reason, you should be able to exit the quiz without submitting. When you return to the quiz, your answers should be saved. There is no timelimit besides the time that the quiz opens and closes. You should have completed Lab 3A. You'll need to refer to the information within that quiz to answer some of the following questions. Here is Link to PDF 3A to make it a little easier. Once you've described a mineral, you will then use the following tables to identify it. Table A-1 Metallic Minerals (https://canvas.uw.edu/courses/1515924/files/86188656/download? download_frd=1) Table A-2 Light Colored Non-metallic Minerals (https://canvas.uw.edu/courses/1515924/files/86188775/download? download_frd=1) (https:/

2/23/22, 5:53 PM Laboratory 3B: Mineral Identification: ESS 101 B Wi 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1515924/quizzes/1604215 2/26 If you're having trouble viewing the photos/videos below, here is a Link to PDF 3B to make it a little easier. 1 / 1 pts Question 1 Mineral 1 Luster Look at the above video. Does this mineral have a pearly (like the inside of a shell) or vitreous (glass-like) luster? [ Select ] Streak What is the streak color for this mineral? white Hardness This mineral is extremely soft and can be scratched with your fingernail (hardness 2.5) See video below (watch full screen to see clear scratch). We can use a hardness probe to further refine our hardness test. Watch the video below using the Hardness "2" probe to further test the hardness of M1 (watch full-screen to clearly see results of test). 0:00 0:00 0:00

2/23/22, 5:53 PM Laboratory 3B: Mineral Identification: ESS 101 B Wi 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1515924/quizzes/1604215 3/26 Answer 1: Answer 2: Answer 3: Answer 4: Does the Hardness probe "2" scratch M1? Based on your observation of video what can you say about the hardness of this mineral? [ Select ] Cleavage vs Fracture This mineral has one cleavage plane. Color & Other Diagnostic Properties This mineral is typically white and feels greasy if rubbed between your fingers. Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . pearly white 1 talc 0.5 / 0.5 pts Question 2 Mineral 2 Luster Look at the above video. What is the luster of this mineral? [ Select ] Streak Observe the color of the streak of this mineral on the white porcelain streak plate (watch the two videos below in full-screen mode).

2/23/22, 5:53 PM Laboratory 3B: Mineral Identification: ESS 101 B Wi 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1515924/quizzes/1604215 4/26 What is the streak color for this mineral? [ Select ] Hardness A glass plate hardness test was conducted for M2 (See video below). Determine M2's hardness relative to the glass plate. If M2 leaves a scratch it is harder than glass, and if M2 does not scratch grass it is softer than glass. What can you infer from this hardness test about M2? [ Select ] Cleavage vs Fracture This mineral naturally grows as octahedral (8-sided) crystals (See image above). However, when this mineral breaks , it does not break into nice even planes. This mineral tends to break along uneven fracture surfaces. Color & Other Diagnostic Properties This mineral has one very diagnostic property that is displayed in this video (Watch the video below showing M2's special diagnostic property). 0:00 0:00 0:00

2/23/22, 5:53 PM Laboratory 3B: Mineral Identification: ESS 101 B Wi 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1515924/quizzes/1604215 5/26 Answer 1: Answer 2: Answer 3: Answer 4: Answer 5: What is this property? [ Select ] Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . 0:00 metallic black/dark grey harder than glass magnetism magnetite 0.25 / 0.25 pts Question 3 If you were allowed only one tool to identify Mineral 2 in the future, what would it be? streak plate magnet HCl acid 0.25 / 0.25 pts Question 4 Your Answer: Do you think that Mineral 2 is found in oceanic crust? Why or why not? ***HINT : think about chrons from Lab 2***