Quiz_ Q3_ Minerals, Sedi Rocks & Streams
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University of Nebraska, Lincoln *
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Course
100
Subject
Geology
Date
Apr 3, 2024
Type
Pages
11
Uploaded by ProfNarwhal3793
00:03 06/03/2024
Quiz: Q3: Minerals, Sedi Rocks & Streams
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Q3: Minerals, Sedi Rocks & Streams
Started: Mar 5 at 9:44pm
Quiz Instructions
Question 1 1 pts
Question 2 1 pts
Question 3 1 pts
You may complete this quiz up to 2 times and the average quiz score will be kept. This quiz contains images. Sometimes Canvas has difficulty showing these (even if the permissions are
set correctly). They may show up for some students and not others. If you run into this issue, the quiz
should show an image name and you can look up the images under Files > Images.
Which of the following are required components of a mineral? (select all that apply)
it has a set crystalline structure
it has a characteristic color
it has a specific composition
it is solid
it is inorganic
it will have 1, 2, or 3 directions of cleavage
Two mineral samples are made of the same thing (same composition), but they have a different
crystalling structure or arrangement of atoms. Are these the same mineral?
Yes
No
Color can always be used to identify a mineral.
00:03 06/03/2024
Quiz: Q3: Minerals, Sedi Rocks & Streams
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Question 4 2 pts
True
False
Below you will see thin sections of 4 rock samples. A thin section is created by taking a thin slice of
rock. You then look at it with a microscope as the light shines through it. Different filters can be used to
produce the bright colors seen in sample B. Match each sample with the correct rock type.
A. B.
C.
00:03 06/03/2024
Quiz: Q3: Minerals, Sedi Rocks & Streams
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A
Igneous
B
Metamorphic
C
Sedimentary
D
Sedimentary
Question 5 1 pts
D.
Clastic sedimentary rocks are primarily classified on the basis of _______.
grain size
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Quiz: Q3: Minerals, Sedi Rocks & Streams
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Question 6 2 pts
Question 7 1 pts
Question 8 1 pts
degree of sorting
angularity
mineral composition
What typically happens to the size, shape, and sorting of clasts as they are transported from steep
mountains toward more gentle settings? (select all that apply)
The size of the clasts decreases
The size of the clasts increases
The clasts become more rounded
The clasts become less rounded
The sediment becomes more poorly sorted (less uniform in size)
The sediment becomes more well sorted (more uniform in size)
A sedimentary rock that is made of clasts that are uniform in size would be considered well sorted. True
False
In the image of a graded bed shown below, is the bed right-side-up or overturned?
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Quiz: Q3: Minerals, Sedi Rocks & Streams
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Question 9 1 pts
right side up
overturned
In this section, a lower gray rock is successively overlain by beach sandstone, lagoon mudstone, and
limestone on top. What is the best interpretation of what was going on?
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Quiz: Q3: Minerals, Sedi Rocks & Streams
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Question 10 1 pts
Sea level was stable but the temperatures were getting warmer
Sea level was rising
Sea level was falling
Sea level was stable but the temperatures were getting colder
In the image below large scale cross bedding can clearly be seen in the red sandstone. In what
direction was the current moving when these rocks were being created?
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Quiz: Q3: Minerals, Sedi Rocks & Streams
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Shale
[ Choose ]
Fossiliferous Limestone
[ Choose ]
Conglomerate
[ Choose ]
Question 11 2 pts
(Image credit: http://www.capelgreen.ukfossils.co.uk/)
left to right
right to left
towards you
away from you
Match the sedimentary rock with the best environment where the rock may have been created.
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Quiz: Q3: Minerals, Sedi Rocks & Streams
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Coal
[ Choose ]
Chalk
[ Choose ]
Gypsum
[ Choose ]
sandstone mixed with conglomerate that is
cross-bedded
[ Choose ]
Question 12 1 pts
Question 13 2 pts
What happens to the majority of sediment being carried by moving water as it enters a standing body of
water?
The sediment remains suspended
The sediment settles to the the bottom
The sediment dissolves in the water column
The image below is a screen shot from google earth. What is this feature?
[ Select ]
If I dug a hole at the location of the blue circle what would I most likely
find? [ Select ]
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Question 14 2 pts
The Google Earth image shows one of the tributaries of the Amazon River in South America. What type
of stream is this? [ Select ]
If we fast forward in time several years, which of the lines marks the most plausible path the stream will
take? [ Select ]
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Question 15 1 pts
To calculate the discharge of a stream, scientists need to determine the cross sectional area of a stream
along with the average velocity. To determine these values they measure the depth of the stream at
multiple locations and measure the velocity of the stream at each location (see figure below). They
typically measure the velocity about 2/3rd of the way to the bottom to get an average stream velocity.
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Quiz saved at 12:03am This Missouri river in Omaha is currently flowing at 25000 cfs (cubic feet per second). If the average
stream velocity was 3.4 mph (or 5 feet/second), what would the cross sectional area of the river be at
that point? Given your answer in square feet. You do not need to include the label in your answer.
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