SCIN 138 Week 4 Exam - Questions and Answers( Complete Solution)

SCIN 138 Week 4 Exam Part 1 of 3 - 20.0/ 20.0 Points Question 1 of 25 4.0 / 4.0 Points Which of the characteristics of sedimentary rocks deals with the grains being the same size? • A. roundness • B. cementation • C. porosity • D. sorting Question 2 of 25 4.0 / 4.0 Points If a sedimentary rock is found to have grains of different shapes and sizes it is said to be what? • A. well sorted • B. poorly cemented • C. poorly sorted • D. permeable Question 3 of 25 4.0/ 4.0 Points What is the classification of this sedimentary rock? • A. organic • B. biochemical • C. chemical • D. clastic Question 4 of 25 4.0 / 4.0 Points Put the following in the order in which they can occur: erosion, transport, weathering, compaction, burial, cementation, sedimentary rock. • A. weathering, erosion, transport, deposition, compaction, burial, cementation, sedimentary rock • B. erosion, transport, weathering, compaction, deposition, burial, cementation, sedimentary rock • C. weathering, erosion, transport, deposition, burial, compaction, cementation, sedimentary rock • D. erosion, weathering, transport, deposition, burial, compaction, cementation, sedimentary rock Question 5 of 25 4.0/ 4.0 Points What is the classification of this sedimentary rock? • A. Chemical • B. clastic • C. biochemical • D. organic Part 2 of 3 - Mass Wasting 44.0/ 44.0 Points Question 6 of 25 4.0 / 4.0 Points Which of the following is a slow moving form of mass wasting? • A. falls • B. slides • C. flows • D. creep Question 7 of 25 4.0 / 4.0 Points Rock falls are strongly influenced by . • A. gravity, chemical weathering, and soil thickness • B. gravity, mechanical weathering, and water. • C. gravity, mechanical weathering, and soil thickness • D. gravity, clay content, and water Question 8 of 25 4.0 / 4.0 Points Adding water to materials on a slope can reduce and cause mass wasting to occur. • A. mass • B. moisture • C. slope • D. friction Feedback: Adding water increases mass and reduces friction, increasing the probability of failure. Question 9 of 25 4.0 / 4.0 Points Which of the following is not a control in rock falls? • A. gravity • B. bedrock fractures • C. sediment particle size • D. slope steepness Question 10 of 25 4.0/ 4.0 Points What type of mass wasting is this? • A. debris flow • B. rock fall • C. earth flow • D. creep Question 11 of 25 4.0 / 4.0 Points The 1959 Madison Canyon landslide killed 28 people near Hebgen Lake. What was the trigger for this landslide? • A. Oversteepening • B. Earthquake • C. Precipitation • D. Devegetation Question 12 of 25 4.0 / 4.0 Points For a block to move down an inclined plane, what force has to be the greatest? • A. Gravity • B. Shear • C. tension • D. Compression • E. Normal Question 13 of 25 4.0 / 4.0 Points A landslide and mudflow both have what in common? • 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 14 of 25 4.0 / 4.0 Points What is the difference between a landslide and a mudflow? • 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 15 of 25 4.0 / 4.0 Points 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 . • A. landslide • B. earthflow. • C. debris flow • D. rock fall Question 16 of 25 4.0 / 4.0 Points 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 . • A. Precipitation • B. Shaking • C. Oversteepening • D. Devegetation Feedback:As in the case of many deadly slides, water was the principal driving factor in the failure of these slopes. Part 3 of 3 - Weathering, etc. 36.0/ 36.0 Points Question 17 of 25 4.0 / 4.0 Points What is the most common material found in sandstones? • A. Feldspar • B. Quartz • C. Lithic fragments • D. Basalt • E. Zircon Feedback:Quartz is highly durable and common, so it is commonly found in sand. Question 18 of 25 4.0 / 4.0 Points Which of these soil horizons contains the greatest amount of organic matter? • A. subsoil • B. C horizon • C. topsoil • D. B horizon Question 19 of 25 4.0 / 4.0 Points Which of the following depositional environments is most likely to form fine-grained mud? • A. Lacustrine • B. Aeolian • C. Glacial • D. Submarine fan Feedback:It is ABYSSAL, LACUSTRINE, and LAGOONAL that are most commonly associated with mudstones. Question 20 of 25 4.0 / 4.0 Points Which of these forms from a slower speed of flow? • A. Chutes and pools • B. Dunes • C. Upper plane bed • D. Ripples • 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 21 of 25 4.0 / 4.0 Points Chemical weathering does NOT include which of the following? • A. hydrolysis • B. exfoliation • C. dissolution • D. oxidation Question 22 of 25 4.0 / 4.0 Points Which type of weathering is responsible for changing the composition of the rock? • A. chemical • B. expansion • C. physical • D. mechanical Question 23 of 25 4.0 / 4.0 Points Which of the following would have little impact on weathering? • A. rock type • B. topography • C. climate • D. pressure Question 24 of 25 4.0 / 4.0 Points Which of these rocks can be chemical or biochemical? • A. Coquina • B. Chert • C. Banded iron formation • D. Evaporites Feedback:Limestone and chert can be made biochemically out of shells or made chemically by directly precipitating from water. Question 25 of 25 4.0 / 4.0 Points Which force of erosion tends to only move sand sized or smaller particles? • A. ice • B. water • C. wind • D. gravity Show Less