TPO42综合写作听力原文：
TPO-42 阅读文本和对应题目文本 第3篇
Callisto and GanymedeFrom 1996 to 1999, the Galileo spacecraft passed through the Jovian system, providing much information about Jupiter's satellites. Callisto, the outermost of Jupiter's four largest satellites, orbits the planet in seventeen days at a distance from Jupiter of two million kilometers. Like our own Moon. Callisto rotates in the same period as it revolves, so it always keeps the same face toward Jupiter. Its noontime surface temperature is only about -140°C, so water ice is stable on its surface year-round. Callisto has a diameter of 4.820 kilometers, almost the same as that of Mercury. Its mass is only one-third as great, which means its density must be only one-third as great as well. This tells us that Callisto has far less of the rocky metallic materials found in the inner planets and must instead be an icy body through much of its interior.Callisto has not fully differentiated, meaning separated into layers of different density materials. Astronomers can tell that it lacks a dense core from the details of its gravitational pull on the Galileo spacecraft during several very close flybys. This fact surprised scientists, who expected that all the big icy moons would be differentiated. It is much easier for an icy body to differentiate than for a rocky one, since the melting temperature of ice is so low. Only a little heating will soften the ice and get the process started, allowing the rock and metal to sink to the center and the slushy ice to float to the surface. Y et Callisto seems to have frozen solid before the process of differentiation was complete.Like our Moon's highlands, the surface of Callisto is covered with impact craters. The survival of these craters tells us that an icy object can form and retain impact craters m its surface. In thinking of ice so far from the Sun, it is important not to judge its behavior from that of the much warmer ice we know on Earth; at the temperatures of the outer solar system, ice on the surface is nearly as hard as rock, and behaves similarly. Ice on Callisto does not deform or flow like ice in glaciers on Earth. Callisto is unique among the planet-sized objects of the solar system in its absence of interior forces to drive geological evolution. The satellite was born dead and has remained geologically dead for more than four billion years.Ganymede, another of Jupiter's satellites and the largest in our solar system, is also cratered, but less so than Callisto. About one-quarter of its surface seems to be as old and heavily cratered; the rest formed more recently, as we can tell by the sparse covering of impact craters as well as the relative freshness of the craters. Ganymede is a differentiated world, like the terrestrial planets. Measurements of its gravity field tell us that the rock and metal sank to form a core about the size of our Moon, with a mantle and crust of ice floating above it. In addition, the Galileo spacecraft discovered that Ganymede has a magnetic field, the signature of a partially molten interior. Ganymede is not a dead world, but rather a place of continuing geological activity powered by an internal heat source. Much of its surface may be as young as half a billion years.The younger terrain is the result of tectonic and volcanic forces Some features formed when the crust cracked, flooding many of the craters with water from the interior. Extensive mountain ranges were formed from compression of the crust, forming long ridges with parallel valleys spaced one to two kilometers apart. In some places older impact craters were split and pulled apart. There are even indications of large-scale crustal movements that are similar to the plate tectonics of Earth.Why is Ganymede different from Callisto? Possibly the small difference in size and internal heating between the two led to this divergence in their evolution. But more likely the gravity of Jupiter is to blame for Ganymede's continuing geological activity. Ganymede is close enough to Jupiter that tidal forces from the giant planet may have episodically heated its interior and triggered major convulsions on its crust.paragraph 1From 1996 to 1999, the Galileo spacecraft passed through the Jovian system, providing much information about Jupiter's satellites. Callisto, the outermost of Jupiter's four largest satellites, orbits the planet in seventeen days at a distance from Jupiter of two million kilometers. Like our own Moon. Callisto rotates in the same period as it revolves, so it always keeps the same face toward Jupiter. Its noontime surface temperature is only about -140°C, so water ice is stable on its surface year-round. Callisto has a diameter of 4.820 kilometers, almost the same as that of Mercury. Its mass is only one-third as great, which means its density must be only one-third as great as well. This tells us that Callisto has far less of the rocky metallic materials found in the inner planets and must instead be an icy body through much of its interior.1.According to paragraph 1, which of the following statements about Callisto is true?A.It is the satellite closest to Jupiter's surfaceB.Its surface temperature is constant at all times of the day.C. It has the same mass and diameter as the planet MercuryD. It completes one rotation every seventeen days.2. According to paragraph 1, how do scientists know that Callisto is made up largely of ice?A. A sample of its interior was taken by the Galileo spacecraft in the late 1990sB. It has too low a density to contain much rocky metallic materialC. With a noontime surface temperature of only about .140° C. the ice on it never meltsD. All of the bodies in the Jovian system are icy, because they are so far from the Sun.paragraph 2Callisto has not fully differentiated, meaning separated into layers of different density materials. Astronomers can tell that it lacks a dense core from the details of its gravitational pull on the Galileo spacecraft during several very close flybys. This fact surprised scientists, who expected that all the big icy moons would be differentiated. It is much easier for an icy body to differentiate than for a rocky one, since the melting temperature of ice is so low. Only a little heating will soften the ice and get the process started, allowing the rock and metal to sink to the center and the slushy ice to float to the surface. Y et Callisto seems to have frozen solid before the process of differentiation was complete.3.Why does the author provide the information that “It is much easier for an icy body to differentiate than for a rocky one”?A. To support the claim that all of the big icy moons are differentiatedB. To suggest that Callisto may be a rocky body rather than an icy oneC. To explain why scientists expected Callisto to be differentiatedD. To refute the claim that Callisto could not differentiate because it was frozen solid4.All of the following questions are answered in paragraph 2 EXCEPT:A.Why was Callisto frozen solid before differentiation was complete?B.What allows the process of differentiation to get started?C. Why is it easier for an icy body to differentiate than a rocky one?D. How do astronomers know that Callisto lacks a dense core?paragraph 3Like our Moon's highlands, the surface of Callisto is covered with impact craters. The survival of these craters tells us that an icy object can form and retain impact craters m its surface. In thinking of ice so far from the Sun, it is important not to judge its behavior from that of the much warmer ice we know on Earth; at the temperatures of the outer solar system, ice on the surface is nearly as hard as rock, and behaves similarly. Ice on Callisto does not deform or flow like ice in glaciers on Earth. Callisto is unique among the planet-sized objects of the solar system in its absence of interior forces to drive geological evolution. The satellite was born dead and has remained geologically dead for more than four billion years.5. Which of the sentences below best expresses the essential information in the highlighted sentence in the passage? Incorrect choices change the meaning in important ways or leave out essential information.A. It should not be assumed that surface ice has the same characteristics wherever it is foundB. Surface ice and rock are much more similar in temperature in the outer solar system than they are on Earth.C. The further away surface ice is from the Sun, the more its temperature differs from that of the warmer ice on EarthD. In the cold of the outer solar system, surface ice is so hard it behaves more like rock than like the warmer ice on Earth6.According to paragraph 3, how is Callisto different from all other planet-sized objects in the solar system?A. It can form and retain impact craters on its icy surfaceB. It has ice glaciers that do not flow or deform.C. It has never had the interior forces required for geological evolution.D. It is more than four billion years old.paragraph 4Ganymede, another of Jupiter's satellites and the largest in our solar system, is also cratered, but less so thanCallisto. About one-quarter of its surface seems to be as old and heavily cratered; the rest formed more recently, as we can tell by the sparse covering of impact craters as well as the relative freshness of the craters. Ganymede is a differentiated world, like the terrestrial planets. Measurements of its gravity field tell us that the rock and metal sank to form a core about the size of our Moon, with a mantle and crust of ice floating above it. In addition, the Galileo spacecraft discovered that Ganymede has a magnetic field, the signature of a partially molten interior. Ganymede is not a dead world, but rather a place of continuing geological activity powered by an internal heat source. Much of its surface may be as young as half a billion years.7.The word “signature” in the passage is closest in meaning toA.primary causeB.end resultC.identifying markD.by-product8. According to paragraph 4, each of the following provides evidence about Ganymede's interior EXCEPTA. Ganymede's large sizeB. measurements of Ganymede's gravity fieldC. the fact that Ganymede has a magnetic fieldD. the fact that Ganymede continues to be geologically activeparagraph 5The younger terrain is the result of tectonic and volcanic forces Some features formed when the crust cracked, flooding many of the craters with water from the interior. Extensive mountain ranges were formed from compression of the crust, forming long ridges with parallel valleys spaced one to two kilometers apart. In some places older impact craters were split and pulled apart. There are even indications of large-scale crustal movements that are similar to the plate tectonics of Earth.9.The word “Extensive” in the passage is closet in meaning toA.UnusualrgeC.NewD.Steep10. Paragraph 5 supports each of the following statements about Ganymede EXCEPT:A. All water on it has always been frozen solid.B. There is evidence that part of its crust once broke openC. Its crust has been subject to forces that have created mountains and valleys.D. Some of its older craters have been split apart by more recent geological activityparagraph 6Why is Ganymede different from Callisto? Possibly the small difference in size and internal heating between the two led to this divergence in their evolution. But more likely the gravity of Jupiter is to blame for Ganymede's continuing geological activity. Ganymede is close enough to Jupiter that tidal forces from the giant planet may have episodically heated its interior and triggered major convulsions on its crust.11. According to paragraph 6, the differences in how Callisto and Ganymede evoked are most probably due to differences in theirA. size and internal heatingB. distance from JupiterC. chemical and physical compositionD. age12.Look at the four squares [■] that indicate where the following sentence could be added to the passage.The difference between Ganymede and Callisto, however, extend much further below the surface of the satellites.Where would the sentence best fit? Click on square [■] to add the sentence to the passageGanymede, another of Jupiter's satellites and the largest in our solar system, is also cratered, but less so than Callisto. [■] About one-quarter of its surface seems to be as old and heavily cratered; the rest formed more recently, as we can tell by the sparse covering of impact craters as well as the relative freshness of the craters. [■] Ganymede is a differentiated world, like the terrestrial planets. [■] Measurements of its gravity field tell us that the rock and metal sank to form a core about the size of our Moon, with a mantle and crust of ice floating above it. [■] In addition, the Galileo spacecraft discovered that Ganymede has a magnetic field, the signature of a partially molten interior. Ganymede is not a dead world, but rather a place of continuing geological activity powered by an internal heat source. Much of its surface may be as young as half a billion years.13. Directions:An introductory sentence for a brief summary of the passage is provided below. Complete the summary by selected THREE answer choices that express the most important ideas in the passage.Some sentences do not belong in the summary because they express ideas that are not presented in the passage or are minor ideas in the passage.This question is worth 2 points.Drag your choices to the spaces where they belong. To review the passage, click on View TextBetween 600 B.C. and 450 B.C., Athens changed the distribution of political power betweenthe aristocracy and ordinary citizens.CallistoGanymede阅读三Answer ChoicesA. It has a core that consists mainly of rock and metal.B. It may have formed as recently as half a billion years agoC. Its interior is not fully solidD. Its evolution has probably been strongly influenced by Jupiter's gravityE. It always keeps the same face toward Jupiter as it orbits the planetF. Its crust is covered by slow-moving glaciersG. Its entire surface is heavily cratered。
托福口语｜TPO42题目+文本
小编给考生们带来了托福TPO42口语文本，希望大家多做题，多积累、多研究，有针对性的规划考试。
托福TPO42口语task1题目:Choose an accomplishment that required you to work very hard. Explain whatthe accomplishment was and why it was important to you.托福TPO42口语task2题目:Some people prefer living in a big city. Other people prefer living in thecountryside, away from urban areas. Which do you think is better? Explain whyusing specific details in your explanation.托福口语TPO42 Task3(听力+阅读+题目):No More Evening ClassesReading Part:No More Evening ClassesThe administration has announced that starting next fall, the universitywill stop offering evening classes in many departments. According to auniversity administrator, the decision was prompted by a steady decline inenrollments in evening classes. Evening classes are just too small, theadministrator said. When asked to explain the decline in enrollments, theadministrator pointed to the fact that most evening classes are taught byteaching assistants, who are usually graduate students. Surveys show thatstudents prefer to take classes taught by experienced faculty members, thespokesperson said, " Probably because they simply know more than graduateteaching assistants do.Question:The man disagrees with the decision announced in the student newspaper.Explain why the university made the decision and why the man disagrees with.托福口语TPO42 Task4(阅读+题目):HabituationReading Part:HabituationHabituation is a form of learning that is quite common among animals. Whenan animal experiences a situation for the first time, particularly one it considers threatening, it may instinctively respond by running away or by warning other members of its community with alarm calls. Normally, it responds this way each time the situation occurs. However, if through continuous and prolonged exposure the animal learns that the situation is harmless the behavior gradually diminishes. Ultimately, it will stop responding to the situation altogether. Thus, through habituation a natural or instinctive behavior gradually changes.Question:The man disagrees with the decision announced in the student newspaper. Explain why the university made the decision and why the man disagrees with.托福口语TPO42 Task5:Possible SolutionsQuestion:The speakers discuss two possible solutions to the woman’s problem. Briefly summarize the problem. Then state which solution you recommend and why.托福口语TPO42 Task6:Climate ChangeQuestion:Using the example of the thunder bird, explain apossible effect of a major climate change.。
2019年托福写作：TPO42综合写作阅读题目
2019年托福写作：TPO42综合写作阅读题目TPO42综合写作题目文本Integrated WritingGlass is a favored building material for modern architecture, yet it is also very dangerous for wild birds. Because they often cannot distinguish between glass and open air, millions of birds are harmed every year when they try to fly through glass windows. There are, however, several solutions that responsible businesses can use to prevent injuries to birds.One-Way GlassOne solution is to replace the regular, clear glass with one-way glass that is transparent in only one direction. The occupants of the building can see out, but birds and others cannot see in. If birds cannot see through a window, theywill understand that the glass forms a solid barrier and will not try to fly through it.Colorful DesignsA second solution is to paint colorful lines or other designs on regular window glass. For example, a window could have a design of thin stripes painted over the glass. People would still be able to see through the openings in the design where there is no paint, while birds would see the stripes and thus avoid trying to fly through the glass. Architects can be encouraged to include colorful painted patterns on glass as part of the general design of buildings.Magnetic FieldThe third solution is to create an artificial magnetic field to guide birds away from buildings. Humans use an instrument called a magnetic compass to determine directions—either north, south, east, or west. Bird research has shown that birds have a natural ability to sense Earth’s magnetic fields; this ability works just like a compass, and it helps birds navigate in the right direction when they fly.A building in a bird flight path can be equipped with powerful electromagnets that emit magnetic signals that steer birds in a direction away from the building.TPO42综合写作DirectionsYou have 20 minutes to plan and write your response. Your response will be judged on the basis of the quality of your writing and on how well your response presents the points in the lecture and their relationship to the reading passage. Typically, an effective response will be 150 to 225 words.TPO42综合写作Essay TopicSummarize the points made in the lecture, being sure to explain how they cast doubt on the specific solutions proposed in the reading passage.You must finish your answer in 20 minutes。
TPO 42 托福独立写作
When it comes to the question that whether a worker like to have different types of tasks a day or to do some similar task for the whole day, there is always some heat debates among the public. Some people may claim that doing different types of works is more attractive because they are less likely to get tired off if they could switch their focus for one task to another. However, as for me, I would like to only focus on similar tasks for the all day. My reasons are listed below.First of all, focusing on similar tasks could help me to do some work repeatedly and spare your time and effort on (一些特定的技巧)（要把原因讲一下）sharpen some particular professional skill and thus be more specialized in some field. Under such circumstances, I could significantly enhance my working efficiency. Take myself as an example. 用艺术/科技方面来举例（例子要将原因）Under such circumstances, I gradually become the expert in this particular field and quickly get promoted as the director specialized in Bank Account in the company. Therefore, it is of great importance to focus on a particular task, which helps you to get improved effectively.（影响，你可能在这个专业就很厉害）（概述要论点的原因和影响都要写，例子也是。
托福写作TPO42独立题目+综合写作文本
在托福写作练习过程中，相信TPO材料中的作文题目都会是大家的首选练习材料。
所以小编给考生们带来了托福写作TPO42，希望可以帮助广大托福考生轻松备考托福。
托福TPO42综合写作TASK 1 Integrated WritingGlass is a favored building material for modern architecture, yet it isalso very dangerous for wild birds. Because they often cannot distinguishbetween glass and open air, millions of birds are harmed every year when theytry to fly through glass windows. There are, however, several solutions thatresponsible businesses can use to prevent injuries to birds.One-Way GlassOne solution is to replace the regular, clear glass with one-way glass thatis transparent in only one direction. The occupants of the building can see out,but birds and others cannot see in. If birds cannot see through a window, theywill understand that the glass forms a solid barrier and will not try to flythrough it.Colorful DesignsA second solution is to paint colorful lines or other designs on regularwindow glass. For example, a window could have a design of thin stripes paintedover the glass. People would still be able to see through the openings in thedesign where there is no paint, while birds would see the stripes and thus avoidtrying to fly through the glass. Architects can be encouraged to includecolorful painted patterns on glass as part of the general design ofbuildings.Magnetic FieldThe third solution is to create an artificial magnetic field to guide birds away from buildings. Humans use an instrument called a magnetic compass to determine directions—either north, south, east, or west. Bird research has shown that birds have a natural ability to sense Earth’s magnetic fields; this ability works just like a compass, and it helps birds navigate in the right direction when they fly. A building in a bird flight path can be equipped with powerful electromagnets that emit magnetic signals that steer birds in a direction away from the building.DirectionsYou have 20 minutes to plan and write your response. Your response will be judged on the basis of the quality of your writing and on how well your response presents the points in the lecture and their relationship to the reading passage. Typically, an effective response will be 150 to 225 words.Essay TopicSummarize the points made in the lecture, being sure to explain how theycast doubt on the specific solutions proposed in the reading passage.You must finish your answer in 20 minutes托福TPO42独立写作TASK 2 Independent WritingDirectionsRead the question below. You have 30 minutes to plan, write, and reviseyour essay. Typically, an effective response will contain a minimum of 300 words.Question:。
2019年托福写作：TPO42综合写作阅读题目.doc
2019 年托福写作： TPO42 综合写作阅读题目TPO42综合写作题目文本Integrated WritingGlass is a favored building material for modern architecture, yet it is also very dangerous for wild birds. Because they often cannot distinguish between glass andopen air, millions of birds are harmed every year when they tryto fly through glass windows. There are, however, several solutions that responsible businesses can use to preventinjuries to birds.One-Way GlassOne solution is to replace the regular, clear glass withone-way glass that is transparent in only one direction. The occupants of the building can see out, but birds and others cannot see in. If birds cannot see through a window, theywill understand that the glass forms a solid barrier and willnot try to fly through it.Colorful DesignsA second solution is to paint colorful lines or other designs on regular window glass. For example, a window could have a design of thin stripes painted over the glass. People would stillbe able to see through the openings in the design where thereis no paint, while birds would see the stripesand thus avoid trying to fly through the glass. Architectscan be encouraged to include colorful painted patterns onglass as part of the general design of buildings.Magnetic FieldThe third solution is to create an artificial magneticfield to guide birds away from buildings. Humans use aninstrument called a magnetic compass to determinedirections —either north, south, east, or west. Bird researchhas shown that birds have a natural ability to sense Earth’s magnetic fields; this ability works just like a compass, andit helps birds navigate in the right direction when they fly.A building in a bird flight path can be equipped withpowerful electromagnets that emit magnetic signals that steerbirds in a direction away from the building.DirectionsTPO42综合写作You have 20 minutes to plan and write your response.Your response will be judged on the basis of the quality of yourwriting and on how well your response presents the points in thelecture and their relationship to the reading passage. Typically,an effective response will be 150 to 225 words.Essay TopicTPO42综合写作Summarize the points made in the lecture, being sure toexplain how they cast doubt on the specific solutionsproposed in the reading passage.You must finish your answer in 20 minutes。
托福TPO42口语Task3阅读文本+听力文本+题目+满分范文
为了帮助大家高效备考托福，为大家带来托福TPO42口语Task3阅读文本+听力文本+题目+满分范文，希望对大家备考有所帮助。
托福TPO42口语Task3阅读文本： No More Evening Classes The administration has announced that starting next fall, the university will stop offering evening classes in many departments. According to a university administrator, the decision was prompted by a steady decline in enrollments in evening classes. "Evening classes are just too small," the administrator said. When asked to explain the decline in enrollments, the administrator pointed to the fact that most evening classes are taught by teaching assistants, who are usually graduate students. “Surveys show that students prefer to take classes taught by experienced faculty members,” the spokesperson said, "probably because they simply know more than graduate teaching assistants do." 托福TPO42口语Task3听力文本： Now listen to two students discussing the article. Man：I just don't know about this decision. Woman：It sort of makes sense to me. Man：Not to me. I don't understand their reasoning. I mean, what's wrong with small classes? I think that's what students actually prefer. And it's easy to see why. Woman：Yeah. You do get to participate more. Man：Definitely. You can be more actively involved, get more attention and support. It's just a better way to learn. Woman：Okay. But there is that survey. Man：I don't know what students they asked, but I know a lot of people who feel just the opposite. I mean, what does experience mean anyway? Sometimes it means you have been teaching the same subject for twenty years and you are probably tired of it by now and maybe not very enthusiastic. Woman：Yeah. That does happen. Man：Whereas if it's the first time or maybe second you are teaching a class,well, it's going to be more exciting to you. And you are going to communicate that excitement to the people you are teaching. At least that's how I see it. 托福TPO42口语Task3题目： The man disagrees with the decision announced in the student newspaper. Explain why the university made the decision and why the man disagrees with it. 托福TPO42口语Task3满分范文： The school has implemented a new policy that the university will stop offering evening classes in many departments starting next fall due to the small scale of them and the unexperienced teaching staff. And the man holds a negative view towards the announcement. The first reason he gives is that thanks to the small classes, students can participate more and be more actively involved, get more attention and learn more. And the second one is based on the fact that some experienced teachers are lack of enthusiasm because they may have been teaching the same subject for too long. In contrast, if this is their first or second time teaching a class, it’s going to be so exciting to them and they’ll definitely dedicate more. Therefore, he disagrees with that opinion. 以上是给大家整理的托福TPO42口语Task3阅读文本+听力文本+题目+满分范文，希望对你有所帮助!。
TPO-42听力题目文本——对话部分(conversation)
TPO 42Conversation1QUESTIONS1.Why does the student want to talk to the professor?A. To let him know that she has no background in artB. To discuss the topic of her art history paperC. To inform him that she is unable to print out the class syllabus at the computer labD. To get another copy of the material from class2.What point does the professor make about the early Bauhaus school?A. Its intention was to create a distinctive artistic style.B. It started out with a focus on architecture.C. It was conceived as an experiment in education.D. Its founding director supported traditional classroom teaching.3.Why does the student mention her German studies?A. To indicate that she is interested in different fields of studyB. To indicate that she knows about the German art schoolC. To explain why she is taking a class about BauhausD. To explain why she thinks Bauhaus centered on architecture4.What is the professor s opinion about how Bauhaus works should bedisplayed?A. They should focus on a famous Bauhaus artist.B. They should reveal the diversity of the Bauhaus.C. They should be based on a single Bauhaus technique.D. They should be arranged by time period5. What does the professor say about the museum that the student is required to visit?Click on 2 answers.A. Its Bauhaus exhibit is organized by themes.B. Its Bauhaus exhibit will not be there much longer.C. It offers students a price reduction on Thursday nights.D. It will probably be quite crowded next weekend.Conversation2QUESTIONS1.Why does the student go to see the man?A. To register her group to perform for Parents’ WeekendB. To change the date when her dance group will give a performanceC. To complain about the floor in a newly built rehearsal roomD. To find out when a room she reserved will be available2. Why is the student s group unable to rehearse in the student center?A. The rehearsal space was overbooked.B. The building is being renovated.C. The rehearsal space was replaced by a game room.D. The group did not reserve a rehearsal room.3. What two points do the speakers make about tap dancing?Click on 2 answers.A.Tap dancing is becoming a popular form of entertainment on campus.B.Tap dancing classes have always been offered at the university.C.Tap dancing requires a certain type of flooring.D.Tap dancing creates sounds that are important to the performance.4. What does the man imply about the student theater?A. It is almost always booked.B. It has not been renovated in a long time.C. It is too small to accommodate the student s dance group.D. It is rarely used for dance performances.5. What does the man imply when he says this:He is not sure what kind of rehearsal space the student needs.He does not know of any rehearsal space off campus.He is unable to reserve rehearsal space off campus.He will call a dance studio in town.。
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托福TPO42综合写作听力原文文本：
Professor: None of the solutions you've read about will effectively stop birds from getting injured.
First, replacing regular glass with one-way glass. Well, the problem with one-way glass is that to the bird on the outside, a one-way glass surface reflects just like a mirror, and a surface that reflects like a mirror is just as bad as regular glass for birds because birds don't understand the mirrors. If they see a reflection of the sky in a mirror or of a tree in a mirror, they'd think the reflection is the sky or is the tree. And they'll fly right into them.
The second solution, painting colorful patterns like stripes on regular glass, also has problems. As the reading said, these designs include openings so people inside the buildings can see out, but birds will perceive these unpainted openings as open holes. And if birds think that they are seeing holes, they'll try to fly right through them. To prevent birds from doing this, the unpainted spaces in a window would have to be extremely small, but that would then make the rooms of the buildings too dark for the people inside them.
The third solution, creating an artificial magnetic field, won't work very well either. While it's true that birds use Earth's magnetic field to help them navigate, they use this only when they are travelling very long distances. For example, if a bird is migrating from a cold country to a warm one before winter, it will use its magnetic sense to figure out which way it should fly. But this ability isn't used to go over short distances, such as going from one side of the city to another. For short trips, birds use their eyes and the brightness of light to determine where to go. So magnetic signals from buildings won't have much effect.。