2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 1/24 Laboratory 3B: Mineral Identification Due Apr 24 at 11:59pm Points 15 Questions 17 Available Apr 15 at 9am - Apr 24 at 11:59pm 10 days Time Limit None Allowed Attempts 2 Instructions Attempt History Attempt Time Score KEPT Attempt 2 11 minutes 15 out of 15 LATEST Attempt 2 11 minutes 15 out of 15 Attempt 1 273 minutes 13.55 out of 15 Score for this attempt: 15 out of 15 Submitted Apr 24 at 2:49pm This attempt took 11 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. 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/1545896/files/89990760/download? download_frd=1) Table A-2 Light Colored Non-metallic Minerals (https://canvas.uw.edu/courses/1545896/files/89990894/download? download_frd=1) (ht 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

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 2/24 Answer 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). 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 ] . 0:00 0:00 0:00 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 4/24 Answer 1: Answer 2: Answer 3: 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). What is this property? [ Select ] Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . 0:00 0:00 metallic Correct! Correct! black/dark grey Correct! Correct!

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 5/24 Answer 4: Answer 5: harder than glass Correct! Correct! magnetism Correct! Correct! magnetite Correct! Correct! 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 Correct! Correct! HCl acid 1 / 1 pts Question 4 Mineral 3 Luster Look at the above video. What is the luster of this mineral? vitreous Streak The streak of this mineral is colorless. Hardness Watch the video below showing the glass plate scratch test for M3. 0:00 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 7/24 Luster Look at the above image and video. What is the luster of this mineral? metallic Streak This mineral has been used as a pigment since prehistoric times because of its distinct streak color. Watch the streak test video below to see this mineral's diagnostic streak color. What color is the streak? reddish brown Hardness A glass plate hardness test was conducted for M4 (See video below). Determine M4's hardness relative to the glass plate. If M4 leaves a scratch it is harder than glass, and if M4 does not scratch grass it is softer than glass. What can you infer from this hardness test about M4? [ Select ] Cleavage vs Fracture This mineral has fracture, although it is difficult to distinguish. Color & Other Diagnostic Properties Watch the video below to determine whether M4 is magnetic. Is M4 magnetic? no 0:00 0:00 0:00 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 8/24 Answer 1: Answer 2: Answer 3: Answer 4: Answer 5: Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . metallic Correct! Correct! reddish brown Correct! Correct! harder than glass Correct! Correct! no Correct! Correct! hematite Correct! Correct! 0.5 / 0.5 pts Question 6 Mineral 4 can look very similar to Mineral 2. Which two physical properties could you use to tell them apart? color streak Correct! Correct! luster hardness magnetism Correct! Correct! 1 / 1 pts Question 7 Mineral 5

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 10/24 Answer 1: Answer 2: Answer 3: Answer 4: Answer 5: Answer 6: Answer 7: If pencil manufacturers used this mineral to make “pencil lead,” pencils would weigh three times as much as normal graphite pencils do. Why would this be the case? [ Select ] . Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . metallic Correct! Correct! black-gray Correct! Correct! 2.5 Correct! Correct! 3 Correct! Correct! 90 Correct! Correct! its density or specific gravity is higher than graphite Correct! Correct! galena Correct! Correct! 1 / 1 pts Question 8 Mineral 6 Luster Look at the above video. Light shines through this mineral but also reflects from its surface. What is the luster of this mineral? vitreous Streak Observe the streak test for M6. 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 11/24 What color of streak does M6 leave on the white porcelain streak plate? [ Select ] Hardness We will conduct a hardness test of M6 using the glass plate and hardness probes. Watch the videos below? Is M6 harder than glass? [ Select ] We will now use hardness probes to accurately determine M6's hardness. Hardness test videos with hardness probes 6, 7, and 8 are shown below: What is its hardness? [ Select ] Cleavage vs Fracture 0:00 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 13/24 Mineral 7 Luster Look at the above video. This mineral reflects light like panes of glass. What is its luster? vitreous Streak Based on the color of this mineral, what color to you think it will streak on a dark porcelain plate? white Hardness We will conduct a hardness test for M7 using our glass plate (Hardness 5.5) and hardness probes to accurately determine its hardness. Watch the hardness test videos below? Is it harder or softer than a glass plate? softer Use the three hardness probe videos to determine M7's hardness. 0:00 0:00 0:00 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 14/24 Answer 1: Answer 2: Answer 3: Based on your observations from the above hardness probe videos, what is the hardness of M7? [ Select ] Cleavage vs Fracture The partial transparency of this mineral allows us to see cracks throughout its interior. These cracks appear regular and are parallel to the edges of the mineral. Does this mineral exhibit fracture or cleavage? [ Select ] Color & Other Diagnostic Properties When an HCl acid is placed on a compound with carbonate in its structure carbon dioxide forms, releasing bubbles. We have conducted an HCl acid test for M7 in the video below. Does hydrochloric acid react with M7? [ Select ] Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . 0:00 0:00 0:00 vitreous Correct! Correct! white Correct! Correct!

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 16/24 Answer 1: Answer 2: Answer 3: Answer 4: If you were going to describe this mineral to your parents or a friend what would be the most obvious discriminating property you would use in this description to help them identify it? [ Select ] Color & Other Diagnostic Properties This mineral is black, sometimes a deep brown in thick sections. It is transparent to translucent to light when it breaks into thin sheets. Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . vitreous (sometimes described as pearly) Correct! Correct! cleavage Correct! Correct! the mineral bends in dark flexible sheets Correct! Correct! biotite Correct! Correct! 1 / 1 pts Question 11 Mineral 9 Luster Look at the above video. What is the luster of this mineral? vitreous Streak This mineral leaves a white streak on a porcelain plate. Hardness This mineral is often used as a replacement for quartz in industrial applications, but it can be scratched by diamond. What is its hardness? [ Select ] Cleavage vs Fracture 0:00

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 17/24 Answer 1: Answer 2: Answer 3: Answer 4: Answer 5: This mineral is dodecahedral (12-side). Watch closely at the above video (right of the jpeg image). You can clearly see the 12-sided crystal. Note that the crystal is broken on its lower right side. Based on the breakage pattern does this mineral exhibit cleavage or fracture (is the crystal face direction repeating within the break)? [ Select ] Color & Other Diagnostic Properties This mineral can exist in many different colors, but the color shown above is the most common. What is the most common color of this mineral? [ Select ] Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is garnet . vitreous Correct! Correct! 7 Correct! Correct! fracture Correct! Correct! dark red Correct! Correct! garnet Correct! Correct! 0.25 / 0.25 pts Question 12 Why do you think Mineral 9 is used in making some forms of sandpaper? Some varieties of this mineral have a hardness slightly higher than quartz Correct! Correct! It has a relatively low hardness It is the dominant mineral in most beach sand 1 / 1 pts Question 13 Mineral 10

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 19/24 Answer 4: Answer 5: white/clear Correct! Correct! muscovite Correct! Correct! 1 / 1 pts Question 14 Mineral 11 Luster Look at the above video. What is the luster of this mineral? vitreous Streak We have conducted a streak test for M11 on a black streak plate (see video below). What color is its steak? [ Select ] Hardness If you tried to scratch a glass plate with this mineral, you wouldn’t see any effect. If you then tried to scratch this mineral with a piece of quartz, you would also struggle to see any effect. What is the hardness of this mineral relative to a glass plate? [ Select ] Cleavage vs Fracture This mineral is typically in the rough shape of a cube, but with front and back forming irregular patterns. When it breaks, this pattern is maintained. This mineral exhibits [ Select ] . What is the angle between the planes? [ Select ] Color & Other Diagnostic Properties Although color is not always the best diagnostic property to use for mineral identifcation, M11 is usually observed in rock exhibiting the color of the specimen used in laboratory. If you were purchasing a granite (rock comprised of multiple silicate minerals) countertop, or tile (see example below), which mineral in the granite do think is M11? [ Select ] 0:00 0:00 / 0:09

2022/4/24 16:21 Laboratory 3B: Mineral Identification: ESS 101 B Sp 22: Introduction To Geology And Societal Impacts https://canvas.uw.edu/courses/1545896/quizzes/1651007 20/24 Answer 1: Answer 2: Answer 3: Answer 4: Answer 5: Answer 6: Answer 7: Now use these characteristics and Tables A1-3 to identify this mineral. This mineral is [ Select ] . vitreous Correct! Correct! white Correct! Correct! similar to glass Correct! Correct! cleavage Correct! Correct! 90 Correct! Correct! salmon pink Correct! Correct! orthoclase Correct! Correct! 1 / 1 pts Question 15 Mineral 12