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Linking San Francisco to Marin County in California, the Golden Gate Bridge is one of the most famous bridges in the world. The bridge crosses over a narrow strait which connects the Pacific Ocean to San Francisco Bay. Prior to the bridge, people traveled by ferry boat across the strait.
Although most people thought a bridge was necessary to expedite travel, some residents of the
bay area felt the risk of building the bridge was too great. Joseph Strauss believed that nothing was impossible, and dreams would never come to fruition if risks weren't taken. So, he decided to gather the best and brightest builders, architects, and workers to embark on the challenge of
building a bridge across the Golden Gate Strait. With safety nets in place, the construction began in 1937. Building the anchorages first, the
builders then move on to the towers on each end, and then to the three-foot thick cables to support the suspension bridge. Lastly, workers labored to complete the roadway which became
the most dangerous and treacherous part of the entire task. The builders had to keep the bridge
balance, so it wouldn't fall into the bay.
Today, over sixty-five years later, the bridge remains a life-line for the people of the San Francisco Bay Area.
Why was the roadway so dangerous to build?
- A. There weren't enough materials available to build the road.
- B. The workers might get hit by passing cars.
- C. The men would fall to their deaths.
- D. If the road wasn't balanced, it would collapse.
Correct Answer: D
Rationale: The roadway was so dangerous to build because if it wasn't balanced correctly, it would collapse. The text mentions that the builders had to keep the bridge balanced to prevent it from falling into the bay. This highlights the critical importance of ensuring the structural integrity and balance of the roadway to maintain the stability of the entire bridge. Therefore, any imbalance in the construction of the roadway could lead to a catastrophic failure of the bridge, making option D the correct answer.
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About 6% of the Earth is covered by rainforests. The largest rainforest in the world is the Amazon Basin, which stretches over 2.3 million square miles across nine different South American countries. This area is double the size of all the other remaining rainforests in the world. Brazil contains 60% of the Amazonian rainforest, as it lies at the mouth of the Amazon River. This river is the second largest in the world and contains more than one-fifth of the world’s fresh water. The Amazon rainforest is classified as a type of wet broadleaf forest. The weather there is very humid and warm, with substantial rainfall contributing to the forest's rich greenery. The tree leaves are pointed and narrow, allowing raindrops to easily slide off wet plants. This tropical rainforest is home to more living species than the entire European continent, with over 400 types of insects living in a single rainforest tree, totaling around 2.5 million species. One square kilometer of rainforest may contain over 75,000 types of trees and approximately 438,000 different kinds of plants, resulting in a total of 90,000 tons of greenery overall. The Amazon rainforest is home to 2,000 species of birds and mammals, with one in every five birds in the world residing there. Local farmers have lived off this rich and diverse land for thousands of years, finding food and water without destroying the environment. The Kayapo people of Brazil farm in an environmentally friendly manner. Instead of using chemicals, they burn wood to enrich the soil and plant banana trees, which attract wasps. These wasps feed on leafcutter ants, helping to control these harmful insects. The rainforest also provides a variety of tropical fruits, such as bananas and coconuts, as food sources. Cinnamon is made from the bark of a rainforest tree, and Amazonian Indians use the fruit and stem of the Buruti plant for drinks, bread, and construction. Many other plants are used for medicinal purposes. However, the Amazon rainforest is in significant danger of disappearing. In 2003 alone, 9,169 square miles of forest were cut down in Brazil. An area the size of a football field is burned every minute, suggesting that the rainforest may be gone by the year 2030. The dangers associated with this activity are clear. Trees absorb poisonous carbon dioxide from the air and release oxygen. Rainforests have more oxygen and less carbon dioxide in their vicinity. When trees are cut down, the amount of carbon dioxide increases, resulting in a warmer atmosphere. This leads to global warming, which is extremely harmful to the environment. It is estimated that the burning of Brazilian rainforests alone produces 200 million metric tons of carbon dioxide each year. Another significant danger associated with the destruction of the rainforest is the disappearance of plants and animals. When trees are cut down, plants and animals lose their food sources and gradually die out. While killing wild animals is illegal in Brazil, poaching remains a problem. An estimated 38 million animals are stolen and sold illegally each year. The most hunted animals are birds, especially parrots, followed by snakes and jaguars
According to the information given, which of the following is NOT mentioned about the Amazon Rainforest?
- A. Its total area
- B. Its bodies of water
- C. Its rainfall
- D. Its extinct animals
Correct Answer: C
Rationale: The passage provides details about the Amazon Rainforest, such as its size, location, the river Amazon, and its characteristics as a wet broadleaf forest. However, there is no mention of the specific amount of rainfall in the Amazon Rainforest. The passage focuses on various aspects of the rainforest but does not discuss its precipitation levels. Therefore, the correct answer is C: 'Its rainfall.'
Glass
I wonder who first discovered glass. This commodity has been a part of civilization from the very beginning. Imagine a world without glass! How dark and dismal it would be. No windows, corrective lenses, telescopes, microscopes, cameras, sparkly drinking containers or mirrors. Life would not be the same without this wonderful discovery. Thank you, whoever found glass!
Glass is not an element, but a combination of several elements. It is a hard, brittle, transparent solid material composed mainly of silica, with additives to change the character of the glass. Common additives are soda, lime, lead, and boron. Each additive changes the properties of the final product. Soda and lime are the most common additives, accounting for about 90% of glass production. Adding lead increases reflectivity, causing the glass to "sparkle." The addition of boron changes the thermal and electrical properties of glass, allowing cookware that can be used in the oven without shattering.
What is the definition of 'brittle'?
- A. Flexible and resilient
- B. Easily broken
- C. Hard and fragile
- D. Tough and sturdy
Correct Answer: B
Rationale: The correct definition of 'brittle' is being 'easily broken,' making choice B the correct answer. Brittle materials are prone to breaking, cracking, or shattering when subjected to stress or pressure. In the context of glass, being described as 'brittle' means that it can break easily without much deformation or flexibility, unlike materials that are tough or resilient. Therefore, understanding the properties of materials like glass, including its brittleness, is crucial in various applications and industries.
Croatian-born inventor Nikola Tesla is often called the "forgotten scientist". Although he
invented the alternating current (AC) motor and developed an AC electricity generation system, he never received historical credit for many of his achievements, unlike one of his first employer and eventual nemesis, inventor Thomas Edison
Tesla made the first sketches of his idea for a brushless of his idea for a brushless AC motor while he was a student at the University of Prague in 1882. His interest in electricity generation led him to Paris where he was employed by the Continental Edison Company later that year to repair Edison's direct current (DC) power plants. Two years later, Tesla immigrated to New York City and acquired a job as an engineer at
Thomas Edison's headquarters in Manhattan. Edison was impressed with Tesla's work ethic and
ingenuity. He challenged the young scientist to develop an improved design for his DC
generators for $50,000. Tesla experimented for months, finally presenting Edison with the
solution he needed. Edison reneged on the deal, telling Tesla that he didn't understand American humor. Tesla soon left Edison in order to begin his own electric light company
Tesla filed and was granted more than 30 patents for his inventions in 1887 and 1888. He soon
had financial backing for his ideas from one of Edison' main competitors, Westinghouse. In the
1890's Tesla experimented with x-rays, developed a high-voltage electrical transformer call the
Tesla coil, and demonstrated the propagation of radio waves two years before the "Father of
Radio" Guglielmo Marconi. He was also the first to harness the mammoth potential energy of
Niagara Falls. He worked with General Electric to install AC generators with turbines driven by the falling waters of the Niagara River, creating the first modern power plant although a brilliant scientist, Tesla was not an astute businessman. He created his own obscurity by relinquishing
royalty rights for his inventions to major corporations for the purpose of raising funds for future projects.
What is the meaning of the word 'mammoth' as it is used in the fourth paragraph?
- A. Dangerous
- B. Raw
- C. Unused
- D. Massive
Correct Answer: D
Rationale: In the context of the fourth paragraph, the word 'mammoth' is used to describe the potential energy of Niagara Falls. The term 'mammoth' means massive or huge, emphasizing the enormous scale and power of the energy source. Therefore, the correct answer is 'D: Massive.' This word choice highlights the immense size and significance of the energy source being harnessed by Tesla, aligning with the description of Niagara Falls as a massive potential energy resource.
Considered the most influential architect of his time, Frank Lloyd Wright (1867-1959) was born in the small rural community of Richland Center, Wisconsin. He entered the University of
Wisconsin at the age of 15 as a special student, studying engineering because the school had no course in architecture. At the age of 20 he then went to work as a draughtsman in Chicago in order to learn the traditional, classical language of architecture. After marrying into a wealthy
business family at the age of 21, Wright set up house in an exclusive neighborhood in Chicago, and after a few years of working for a few architectural firms, set up his own architectural office. For twenty years he brought up a family of six children upstairs and ran a thriving architectural
practice of twelve or so draughts men downstairs. Here, in an idyllic American suburb, with
giant oaks, sprawling lawns, and no fences, Wright built some sixty rambling homes by the year 1900. He became the leader of a style known as the "Prairie" school - houses with low-pitched roofs and extended lines that blended into the landscape and typified his style of "organic
architecture".
By the age of forty-one, in 1908, Wright had achieved extraordinary social and professional success. He gave countless lectures at major universities and started his Taliesin Fellowship - a visionary social workshop. In 1938 he appeared on the cover of Time magazine, and later, on a
two-cent stamp. The most spectacular buildings of his mature period were based on forms borrowed from nature, and the intentions were clearly romantic, poetic, and intensely personal. Examples of these buildings are Tokyo's Imperial Hotel (1915-22: demolished 1968), and New
York City's Guggenheim Museum (completed 1959). He continued working until his death in 1959, at the age of 92, although in his later years, he spent as much time giving interviews and
being a celebrity, as he did in designing buildings. Wright can be considered an essentially
idiosyncratic architect whose influence was immense but whose pupils were few.
What is the main focus of the passage?
- A. the development of modern architecture in America
- B. the contributions of the 'Prairie' School to modern architecture
- C. the life and achievements of a famous architect
- D. the influence of the style of 'organic architecture' in America
Correct Answer: C
Rationale: The passage primarily focuses on the life and achievements of the famous architect Frank Lloyd Wright. It provides a detailed account of Wright's early life, education, architectural influences, personal life, professional success, and notable projects. The passage highlights key events in Wright's life, from his education and early work experiences to his architectural style, social impact, and recognition in the architectural world. While elements of modern architecture, the 'Prairie' School, and 'organic architecture' are mentioned, they serve as supporting details to illuminate various aspects of Wright's life and career. Therefore, the correct answer is 'C: the life and achievements of a famous architect.'
Lightning Strikes: The old wives' tale of "Lightning never strikes twice" has been proven untrue time and time again. Lightning forms from negative and positive charges within clouds and from the earth below. When these charges react with each other, the air between the cloud and the earth ionizes, which produces a lightning flash. Lightning is actually a series of multiple events consisting of a leader stroke of lightning, followed by as many as 40 smaller strokes of lightning. Being just split seconds apart, these strokes of lightning often reflect off the lining of the clouds.
Lightning rods that extend from above the roof to the ground protect buildings by forming a low resistance path for the lightning so that the lightning does not enter the building, but rather defuses as it penetrates the ground.
Some myths about lightning need to be explained. Lightning does strike tall buildings often, and during a particularly violent storm, a tall building may be hit by lightning several times. The safest place during a thunder and lightning storm is in a metal car or lying flat, face down, in the open, not under a tree as the myth suggests.
Many people believe that thunder and lightning are connected; however, this proves to be true only about 50% of the time, so if you're waiting for the clap of thunder, you're missing out on some exciting strokes of lightning!
Lightning causes injuries, deaths, and forest fires each year. However, some scientists reveal the positive aspects of lightning because it releases nitrogen into the atmosphere which the raindrops then deliver to earth to fertilize our soil.
In paragraph two, the word penetrates means
- A. To be absorbed by the mind.
- B. To pierce.
- C. Having or showing great insight.
- D. To discover or understand.
Correct Answer: B
Rationale: The correct answer is B: To pierce. The word "penetrates" in the context of the passage refers to lightning making its way through the ground as it strikes. Lightning rods provide a low-resistance path for the lightning to follow, allowing it to pierce through the ground safely. Choices A, C, and D do not accurately reflect the meaning of the word "penetrates" in this context. Choice A, "To be absorbed by the mind," does not relate to the physical action of lightning entering the ground. Choice C, "Having or showing great insight," and choice D, "To discover or understand," do not align with the action of lightning piercing through the ground. Therefore, choice B is the correct answer as it directly corresponds to the physical action described in the passage.