SCIN 138 Week 7 Exam - Questions and Answers( Complete Solution)

Week 7 Exam (timed and single access) Return to Assessment List Part 1 of 4 - 44.0/ 48.0 Points Question 1 of 25 4.0/ 4.0 Points Evidence of recent climate change is found in _____.  A. decreased crop yields  ...

Week 7 Exam (timed and single access) Return to Assessment List Part 1 of 4 - 44.0/ 48.0 Points Question 1 of 25 4.0/ 4.0 Points Evidence of recent climate change is found in _____.  A. decreased crop yields  B. all of the above  C. reduction of sea ice  D. ocean acidification Question 2 of 25 0.0/ 4.0 Points Data from the past 100 years (years 1900 - 2000 average) indicates that global temperatures have increased approximately _____ °C:  A. 0.1  B. 0.2  C. 0.5  D. 1.2  E. 1.5 Question 3 of 25 4.0/ 4.0 Points The most probable cause of anthropogenic warming in the foreseeable future is the increase in _____.  A. carbon dioxide  B. chlorofluorocarbons  C. sunlight  D. ozone  E. chlorine oxides Question 4 of 25 4.0/ 4.0 Points The process by which increased levels of CO2 in the atmosphere lead to enhanced growth of vegetation, which then removes CO2 from the atmosphere through photosynthesis is termed a _____.  A. positive feedback  B. reservoir  C. Milankovitch Cycle  D. sink  E. negative feedback Question 5 of 25 4.0/ 4.0 Points The radiative balance between incoming and outgoing energy is moderated by the _____.  A. climate  B. global warming  C. weather  D. atmosphere  E. anthroposphere Question 6 of 25 4.0/ 4.0 Points According to a 2004 study published in the prestigious journal of Science, _____ percentage of climate scientists agree that warming is from human activities.  A. 97%  B. 5%  C. 57%  D. 75% Question 7 of 25 4.0/ 4.0 Points _____ in the atmosphere scatter incoming solar radiation, resulting in the cooling of the planet.  A. albedos  B. radiatively active gasses  C. aerosols  D. ozones  E. All of the aforementioned. Question 8 of 25 4.0/ 4.0 Points To distinguish between weather and climate, many scientists use a/an _______year average of data.  A. 30  B. one  C. 100  D. 10  E. 50 Question 9 of 25 4.0/ 4.0 Points Which of the following is NOT a likely consequence of enhanced global warming?  A. heat waves  B. flooding of islands  C. enlarged ozone hole  D. increased droughts  E. stronger storms Feedback:enlarged ozone hole Question 10 of 25 4.0/ 4.0 Points Which of the following does NOT have a known effect on Earth's global climate?  A. Earth-Moon tidal gravity  B. subduction  C. volcanoes  D. plants  E. greenhouse effect Question 11 of 25 4.0/ 4.0 Points Which of the following is NOT a likely consequence of enhanced global warming?  A. stronger storms  B. increased droughts  C. enlarged ozone hole  D. flooding of islands  E. heat waves Feedback:enlarged ozone hole Question 12 of 25 4.0/ 4.0 Points Which is the most abundant of the naturally occurring greenhouse gases?  A. carbon dioxide  B. ozone  C. methane  D. water vapor  E. nitrous oxide Part 2 of 4 - Deserts 24.0/ 24.0 Points Question 13 of 25 4.0/ 4.0 Points Which desert landscape sequence is in the proper order from young to old?  A. Alluvial Fan > Bajada > Inselberg  B. Bajada > Alluvial Fan > Inselberg  C. Alluvial Fan > Inselberg > Bajada  D. Inselberg > Bajada > Alluvial Fan  E. Inselberg > Alluvial Fan > Bajada Question 14 of 25 4.0/ 4.0 Points Which of the following is NOT a type of desert?  A. Polar  B. tropical  C. trade wind  D. rain shadow Feedback:grassland Question 15 of 25 4.0/ 4.0 Points Why does desertification create even more desert in a positive feedback loop?  A. Plants help create wind patterns, and they stop when arid conditions occur  B. Rocks absorb more solar energy than plants, increasing heat  C. Drying lakes create dust which amplify and trap solar energy  D. More open spaces absorb even more solar energy, increasing heat  E. Arid conditions kill plants and make soil less able to absorb moisture Question 16 of 25 4.0/ 4.0 Points Which of these desert landforms would most likely be associated with salt flats?  A. Barchan  B. Inselberg  C. Arroyo  D. Ephemeral stream  E. Playa Question 17 of 25 4.0/ 4.0 Points Which of the following is formed from a natural version of sand blasting?  A. Loess  B. Desert varnish  C. Blowout  D. Yardang Question 18 of 25 4.0/ 4.0 Points The term _____ refers to wind-related forces.  A. desertification  B. suspension  C. saltation  D. aeolian Feedback:eolian Part 3 of 4 - Glaciers 24.0/ 24.0 Points Question 19 of 25 4.0/ 4.0 Points What is the main cause of the glacial cycles during the Quaternary Ice Age?  A. Carbon Dioxide Cycles  B. Wilson Cycles  C. Milankovitch Cycles  D. Tectonic Cycles Question 20 of 25 4.0/ 4.0 Points In a cross-sectional view of a glacier, where does the ice actually flow internally (ductile deformation)?  A. The top 100 feet  B. In the area with the largest crevasses  C. The upper 500 feet or less than 100 kilopascals  D. The lower part of the glacier where stress exceeds 100 kilopascals Question 21 of 25 4.0/ 4.0 Points When was the peak of the last glaciation? 26,5000 to 19,000 years ago 323 to 300 million years ago 420,000 years ago ~2.5 billion years ago  A. 10,000 to 12,000 years ago  B. 26,5000 to 19,000 years ago  C. 323 to 300 million years ago  D. 420,000 years ago Question 22 of 25 4.0/ 4.0 Points In the glacial ice budget, a zone of snow accumulation is balanced by a zone of _____.  A. sublimation  B. exhalation  C. ablation  D. abrasion Question 23 of 25 4.0/ 4.0 Points When a glacier “advances”, this means ________.  A. The terminus of the glacier is moving forward; the glacier is growing  B. The glacier is calving into the ocean, where pieces of ice are becoming icebergs  C. It is gaining snow as fast as it is losing it; the glacier is not shrinking  D. It is flowing downhill towards the end of the glacier Feedback:"Sometimes ice at the bottom of a glacier slides across its bed (the rock or sediment on which the glacier rests). This is called basal sliding." p. 411 Question 24 of 25 4.0/ 4.0 Points The classic shape of a glacial valley is _____.  A. very narrow  B. V-shaped  C. terraced  D. U-shaped Part 4 of 4 - Week 7 Lesson Questions 4.0/ 4.0 Points Question 25 of 25 4.0/ 4.0 Points A moraine is:  A. Formed only when a glacier advances.  B. Particles transported and deposited by water.  C. A pile of angular, poorly sorted sediment.  D. A pile of well sorted, well-rounded particles. Feedback:Lesson 7