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Lesson 3 ©Curriculum Associates, LLC Copying is not permitted. L3: Citing Evidence to Make Inferences 25 Part 5: Common Core Practice 6 Several studies have attempted to nd the source of the Marfa lights. During World War II, pilots at Midland Army Air Field searched for a source from the air. In 1975, local pilot Fritz Kahl led one hundred observers on the “Marfa Ghost Light Hunt.” Neither investigation proved successful. 7 In May 2004, a group of university physics students conducted a new study using high-tech equipment. A er four days, the students concluded that automobile headlights from a nearby highway caused the Marfa lights. T ey attributed the strange appearance and movement of these lights to what is called the Fata Morgana mirage. 8 T e Fata Morgana mirage is a superior mirage, which is characterized by multiple distortions. With superior mirages, what you perceive to be higher in the sky is really lower to the ground. Light bends downwards when it hits a layer of cold air, making it appear as if what is below your sight line is actually straight ahead or above because you are seeing the inverted image of what is on the horizon projected above it. A Fata Morgana mirage can make distant objects appear to hover in the air. 9 Does this mean that the mystery of the Marfa lights has been solved? T e answer is not quite that simple. In his 2010 book Hunting Marfa Lights , engineer James Bunnell describes sightings of the lights he and others have witnessed that couldn’t possibly have been caused by a superior mirage. How Can You See T em? 10 With so many con f icting theories about the lights, people complain that there will never be a de nitive answer about their origin. However, the local population has few complaints about the mysterious lights. T e highway department has constructed an o cial viewing site near Marfa. And every Labor Day weekend, there is a Marfa Lights Festival held in celebration of the lights that includes a parade and other events. Marfa’s economy booms as hotels ll up quickly and tourists spend their money on food, entertainment, and souvenirs. 11 If you want to attempt to see the Marfa lights, spend time between Marfa and Paisano Pass, south of Route 90. T e most advantageous viewing spot is near U.S. Highway 67 on Mitchell Flat. 1 Which sentence from the article best explains why the Marfa lights remain a mystery? A “They appear only 10 to 20 times each year, in all seasons and any kind of weather.” B “Sightings occur between dusk and dawn, lasting from a few seconds to several hours.” C “The Marfa lights seem to occur more frequently during the second half of the lunar cycle, between the full moon and the next new moon.” D “With so many conicting theories about the lights, people complain that there will never be a denitive answer about their origin.” Answer Form 1 A B C D 2 A B C D 3 A B C D Number Correct 3
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