American Military University ERSC181 B001/ ERSC 181 week 4 quiz (answered) 100% scored 2021
American Military University ERSC181 B001 ERSC181 week 4 quiz. 1/ Week 4 Exam (timed and single access) Return to Assessment List Part 1 of 3 - 20.0/ 20.0 Points Question 1 of 25 If a sedimentary rock is found to have grains of different shapes and sizes it is said to be what? 4.0/ 4.0 Points A. poorly cemented B. well sorted C. permeable D. poorly sorted Question 2 of 25 What is the classification of this sedimentary rock? 4.0/ 4.0 PointsA. clastic B. biochemical C. chemical D. organic Question 3 of 25 Put the following in the order in which they can occur: erosion, transport, weathering, compaction, burial, cementation, sedimentary rock. 4.0/ 4.0 Points A. erosion, transport, weathering, compaction, deposition, burial, cementation, sedimentary rock B. weathering, erosion, transport, deposition, burial, compaction, cementation, sedimentary rock C. weathering, erosion, transport, deposition, compaction, burial, cementation, sedimentary rock D. erosion, weathering, transport, deposition, burial, compaction, cementation, sedimentary rock Question 4 of 25 Which of the following is true of some sedimentary rocks?4.0/ 4.0 Points A. They form as a result of volcanic processes.B. They form as a result of intense heat and pressure C. They form as a result of weathering and melting. D. They form as the result of precipitation from water. E. They form as the result of precipitation from the atmosphere. Question 5 of 25 Which of the characteristics of sedimentary rocks deals with the grains being the same size? 4.0/ 4.0 Points A. porosity B. roundness C. sorting D. cementation Part 2 of 3 - Mass Wasting 44.0/ 44.0 Points Question 6 of 25 What is the difference between a landslide and a mudflow? 4.0/ 4.0 Points A. A landslide is more dangerous because it moves faster. B. A landslide occurs in areas with steeper slopes. C. A landslide is mainly rock fragments while a mudflow has more water. D. A mudflow contains no large rocks or boulders. Question 7 of 25 The 2005 La Conchita slide in California and the 2014 Oso landslide in Washington were both deadly landslides in residential areas. They were principally caused by . 4.0/ 4.0 Points A. Precipitation B. OversteepeningC. Shaking D. Devegetation Feedback: As in the case of many deadly slides, water was the principal driving factor in the failure of these slopes.Question 8 of 25 Rock falls are strongly influenced by . 4.0/ 4.0 Points A. gravity, clay content, and water B. gravity, mechanical weathering, and soil thickness C. gravity, mechanical weathering, and water. D. gravity, chemical weathering, and soil thickness Question 9 of 25 4.0/ 4.0 Points What type of mass wasting is this? A. debris flow B. rock fall C. earth flow D. creepQuestion 10 of 25 The 1959 Madison Canyon landslide killed 28 people near Hebgen Lake. What was the trigger for this landslide? 4.0/ 4.0 Points A. Oversteepening B. Earthquake C. Precipitation D. Devegetation Q AQuestion 10 of 25 A. They are only found in the same area. B. The location tends to be in valleys. C. Both act almost as a fluid. D. Both are water-saturated. Question 12 of 25 Which of the following is not a control in rock falls? 4.0/ 4.0 Points A. gravity B. bedrock fractures C. sediment particle size D. slope steepness Question 13 of 25 Adding water to materials on a slope can reduce and cause mass wasting to occur. 4.0/ 4.0 Points A. mass B. slope C. friction D. moisture Feedback: Adding water increases mass and reduces friction, increasing the probability of failure.Question 14 of 25 A form of mass wasting composed of loose soil, rock, organic matter, air and water and caused by intense surface-water flow, due to heavy precipitation is known as . 4.0/ 4.0 Points A. landslide B. earthflow. C. debris flow D. rock fall Question 15 of 25 Which of the following is a slow moving form of mass wasting? 4.0/ 4.0 Points A. falls B. slides C. flows D. creep Question 16 of 25 For a block to move down an inclined plane, what force has to be the greatest? 4.0/ 4.0 Points A. Gravity B. Normal C. tension D. Shear E. Compression Part 3 of 3 - Weathering, etc. 28.0/ 36.0 PointsQuestion 17 of 25 Which of these does NOT indicate a paleocurrent and the direction water has flowed in the past? 4.0/ 4.0 Points A. Imbrication B. Ripple marks C. Bouma sequenceD. Flute cast E. Parting lineation Feedback: All of them except the Bouma sequence indicate paleocurrent. The Bouma sequence is a graded bed from a turbidite. Question 18 of 25 Which of the following would have little impact on weathering? 4.0/ 4.0 Points A. rock type B. climate C. pressure D. topography Question 19 of 25 Which of these forms from a slower speed of flow? 0.0/ 4.0 Points A. Chutes and pools B. Dunes C. Upper plane bed D. Ripples Correct Answer E. Antidunes Feedback: Ripples are formed in the slowest flows of the features listed, with speeds right above sediments laid down in flat laminae. Next fastest are dunes, then upper plane bed, then antidunes, and finally chutes/pools Question 20 of 25 Which force of erosion tends to only move sand sized or smaller particles? 4.0/ 4.0 Points A. water B. wind C. gravityD. ice Question 21 of 25Which of the following depositional environments has the least water? 4.0/ 4.0 Points A. Lacustrine B. Littoral C. Aeolian D. Alluvial E. Shoreface Feedback: Aeolian is deposition by wind. without water. Question 22 of 25 Which type of weathering increases the surface area of a rock? 4.0/ 4.0 Points A. chemical B. oxidation C. mechanical D. dissolution Rationale: Question 23 of 25 What is the most likely cause of a sediment with highly rounded grains? 4.0/ 4.0 Points A. Longer distance transported B. Stronger bedrock C. Shorter time since weathering D. Lack of water in environment E. Higher temperatures in environmentFeedback: The general rule of thumb is: the longer the distance, the more the rounding. Question 24 of 25 Which type of weathering is responsible for changing the composition of the rock? 4.0/ 4.0 Points A. mechanical B. chemicalC. expansion D. physical Question 25 of 25 Which of these soil horizons is the darkest in color? 0.0/ 4.0 Points A. A horizon B. B horizon C. C horizon D. O horizon Correct Answer Powered by Sakai Copyright The Apereo Foundation. All rights reserved. Portions of Sakai are copyrighted by other parties as described in the Acknowledgments screen.
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ersc 181 week 4 quiz
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ersc181 week 4 quiz
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put the
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if a sedimentary rock is found to have grains of different shapes and sizes it is said to be what
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what is the classification of this sedimentary rock
