A BIT ABOUT BICYCLES
Today, bicycles are so common that it's hard to believe they haven't always been around. But two hundred years ago, bicycles didn't even exist, and the first bicycle, invented in Germany in 1818, was nothing like our bicycles today. It was made of wood and didn't even have pedals. Since then, however, numerous innovations and improvements in design have made the bicycle one of the most popular means of recreation and transportation around the world. In 1839, Kirkpatrick Macmillan, a Scottish blacksmith, dramatically improved upon the original bicycle design. Macmillan's machine had tires with iron rims to keep them from getting worn down. He also used foot-operated cranks like pedals, so his bicycle could be ridden at a quick pace. It didn't look much like a modern bicycle, though, because its back wheel was substantially larger than its front wheel. In 1861, the French Michaux brothers took the evolution of the bicycle a step further by inventing an improved crank mechanism. Ten years later, James Starley, an English inventor, revolutionized bicycle design. He made the front wheel many times larger than the back wheel, put a gear on the pedals to make the bicycle more efficient, and lightened the wheels by using wire spokes. Although this bicycle was much lighter and less tiring to ride, it was still clumsy, extremely top heavy, and ridden mostly for entertainment. It wasn't until 1874 that the first truly modern bicycle appeared on the scene. (14) Invented by another Englishman, H.J. Lawson, the "safety bicycle" would look familiar to today's cyclists. This bicycle had equal-sized wheels, which made it less prone to toppling over. Lawson also attached a chain to the pedals to drive the rear wheel. With these improvements, the bicycle became extremely popular and useful for transportation. Today they are built, used, and enjoyed all over the world.
What was the author's intention in the passage about bicycles?
- A. Learn how to repair modern bicycles
- B. Understand a bit about the history of bicycles
- C. Compare different types of bicycles
- D. Discover the latest bicycle technologies
Correct Answer: B
Rationale: The correct answer is B: 'Understand a bit about the history of bicycles.' The passage provides a historical overview of the evolution of bicycles, starting from their early designs to the development of modern bicycles. It highlights key innovations and improvements in bicycle design over time. The focus is on informing readers about the origins and advancements in bicycle technology rather than teaching them how to repair bicycles, comparing different types, or discussing the latest technologies. Therefore, the main purpose of the passage is to provide insight into the history of bicycles.
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It is a well-known fact that it takes the Earth approximately 365 days to orbit the Sun. At the same time, the Earth revolves or spins around itself over the course of 24 hours, which explains why we experience day and night. One half of the Earth is always facing the Sun, while the other half is facing away. As a result, different time zones divide the globe. Moving suddenly from one time zone to another, such as when flying from Asia to North America, can cause jet lag. People often feel tired, wake up suddenly during the night, and cannot return to sleep. It takes time to adjust to a new time zone. Another important factor to consider is the slight tilt of the Earth toward the Sun. The Earth does not stand straight but leans slightly to one side. Therefore, when it revolves around the Sun, the middle part of the Earth is always closer to the Sun and receives more heat. This area is called the equator, and the regions above and below it are known as the tropics. Countries located in the tropics receive a consistent amount of daylight throughout the year, with the Sun rising at 6 AM and setting at 6 PM. In contrast, the tips of the Earth, or the poles, receive hardly any light because they are so far from the Sun. There are two main seasons at the poles: 6 months of summer, when the Sun is always shining (even at night), and 6 months of winter, characterized by constant darkness. Between the tropics and the poles lies the temperate zone, where there are four distinct seasons. The Sun rises and sets at different times throughout the year. In spring and summer, it gets light earlier; in fall and winter, it gets dark earlier. People living in temperate zones take advantage of this variation to maximize their daylight exposure. At the beginning of spring, countries in Europe and North America readjust their clocks by moving them an hour ahead. As a result, the Sun does not set around 7 or 8 PM as usual, but an hour later. This practice is called Daylight Savings Time (DST) and lasts until the beginning of fall, when people move their clocks back one hour to Standard or Regular Time. It is believed that Benjamin Franklin first suggested the introduction of Daylight Savings Time in the 18th century, but the first serious proposal came in 1907 from William Willet. However, his idea was shelved by the British government, which deemed it unnecessary. Daylight Savings Time was first implemented by the German government in 1916 in order to save energy during World War I. Shortly after, the United Kingdom followed suit, with the United States doing the same in 1918. The law was unpopular, as people had to wake up earlier, leading many to experience a feeling similar to jet lag. However, the energy crisis of the 1970s forced the U.S. to establish Daylight Savings Time as law. Studies showed that the introduction of Daylight Savings Time in the spring saved the U.S. 10,000 barrels of oil per day between 1974 and 1975. It also prevented 2,000 traffic injuries and 50 traffic-related deaths, saving the country $28 million. Currently, Americans switch to Daylight Savings Time on the first Sunday in April and revert to Standard Time on the last Sunday in October. As of 2007, the time adjustments occur even earlier in March and November.
If it is 7 p.m. Standard Time, what time is it for Daylight Savings Time?
- A. 6 p.m.
- B. 8 p.m.
- C. 7 a.m.
- D. 8 a.m.
Correct Answer: A
Rationale: When transitioning from Standard Time to Daylight Savings Time, the clock is moved forward by one hour. Therefore, if it is 7 p.m. Standard Time, it would be 8 p.m. in Daylight Savings Time. The correct answer is 6 p.m., reflecting the advancement of the clock by one hour during the Daylight Savings Time period.
ELECTORAL COLLEGE
The Electoral College has nothing to do with college and contains no students. The Electoral College consists of votes that each state acquires based on the number of representatives it has in Congress. Each state has two electoral votes because each state has two senators. The remaining electoral votes are determined by the number of Congressmen, the number of which is based on the population of the state established by the Census taken each decade. During the presidential election, most states cast all their electoral votes for the candidate who wins the popular vote in that state. It's all very confusing, but the founding fathers know what they were doing. Downloaded by Abdul Hamid (a.ahamid2181@gmail.com) lOMoARcPSD|10672023 HESI A2 V2 Grammar, Vocab, Reading, & Math Questions with Answers). By having and using the Electoral College candidates' campaign in every state, but just because they win the popular vote across the country doesn't mean they will always win the election. Case in point, in election 2000, Al Gore won the popular vote across the country, but George W. Bush won more electoral votes. Therefore, he became our 43rd president.
What is the author's main intention in discussing the Electoral College?
- A. Learn about the history of voting rights
- B. Have an understanding of the Electoral College
- C. Understand the role of political parties
- D. Explore the influence of media on elections
Correct Answer: B
Rationale: The author's main intention in discussing the Electoral College is to provide the reader with an understanding of how it functions and its significance in the electoral process. The explanation in the text focuses on the structure of the Electoral College, how electoral votes are allocated based on congressional representation and population, and how it impacts presidential elections. The information aims to clarify the purpose and workings of the Electoral College rather than delve into the history of voting rights, political parties, or media influence on elections.
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 in nine different South American countries. This area is double the length of all the other remaining rainforests in the world. Brazil contains 60%of the Amazonian rainforest, since it lies at the mouth of the river Amazon. 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 a type of wet broadleaf forest. The weather there is very humid and warm as it rains quite a bit. Because of the high rainfall, the forest is very rich and green. The
tree leaves are pointed and narrow so that the raindrops can easily drop off wet plants. This
tropical rainforest has more living species than the entire European continent. There are over 400 types of insects living in one single rain forest tree for a total of 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, which comes to a total of 90,000 tons of greenery overall. The Amazon rainforest is home to 2,000 birds and mammals, with one in every five birds in the world living there. Local farmers have lived off this rich and diverse land for thousands of years. They have been able to find food and water here without destroying the land. The Kayapo people of Brazil
farm in an environmentally-friendly way. Instead of chemicals, they use burned wood to enrich the soil, and plant banana trees, which attract wasps. These wasps then feed on leafcutter ants and get rid of these harmful insects. The rainforest also offers a lot of tropical fruits, such as bananas and coconuts, as food.
Cinnamon is made from the bark of a rainforest tree. Amazonian Indians use the fruit and stem
of the Buruti plant as a drink, to make bread and to build houses. Many other plants are used as medicine. But the Amazon rainforest is in very big danger of disappearing. 9,169 square miles of
forest have been cut down in 2003 in Brazil alone. An area of the size of a football field is burned down basically every minute, which means that the rain forest may be gone by the year 2030.The dangers related to this type of activity are obvious. Trees take in poisonous carbon
dioxide from the air and give off oxygen. There is more oxygen and less carbon dioxide around a
rainforest. When trees are cut down, however, the amount of carbon dioxide increases, and the
air gets warmer. 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 ayear. Another danger connected with destroying the rainforest is the disappearance of plants and animals. When trees are cut down, plants and animals have no more
food left and slowly die out. Killing wild animals is illegal in Brazil, but there is plenty of stealing going on. 38 million animals are stolen and sold illegally each year. The most hunted
animals are birds, especially parrots, followed by snakes and the jaguar.
Which of the following statements is true about the Amazon Basin?
- A. It is not much larger than all the other rainforests in the world combined.
- B. It is more than one-fifth the size of all the other rainforests in the world combined.
- C. The tree leaves there have a specific shape to allow raindrops to fall off easily.
- D. It is a habitat for many mammals and birds.
Correct Answer: B
Rationale: The Amazon Basin, the largest rainforest in the world, covers over 2.3 million square miles, which is more than one-fifth the size of all the other remaining rainforests in the world combined. This vast rainforest is home to a diverse range of plant and animal species, making it a vital ecosystem for biodiversity. The specific shape of the tree leaves in the Amazon Basin is designed to allow raindrops to easily fall off, contributing to the high rainfall and lush greenery of the forest. Additionally, the Amazon Basin is indeed a habitat for over 2,000 birds and mammals, showcasing the rich biodiversity present in this unique ecosystem.
A Bit About Bicycles: Children begin to taste freedom on bicycles. Historians believe that bicycles began around 3500 B.C. in the Middle East although it took 53 centuries before bicycles were fashioned in the way we know them today.
With over 1500 moving parts, bicycles are complex yet simple machines and amazingly the basic design has not changed since the 1880s. A few tweaks have been added, such as gears and hand-operated brakes, but bicycles remain a steady source of exercise and entertainment for both children and adults. Some forms of bicycling are mountain biking and BMX biking which is similar to cross-country motorcycle racing.
In many countries around the world, bicycles are a necessary part of daily existence. Bicycling in China is imperative if you want to go places, due to the vast population in a relatively small area. Bicycles are coming back in high demand all over the world.
The author intended the reader to
- A. move to China to ride bicycles.
- B. understand a bit about the history of bicycles.
- C. use a bicycle for mountain biking.
- D. believe that bicycles are the only way to exercise.
Correct Answer: B
Rationale: The correct answer is B: understand a bit about the history of bicycles. In the given text, the author discusses the history of bicycles, mentioning their origins in the Middle East around 3500 B.C. and the evolution of bicycles over centuries. The text also highlights the complexity and simplicity of bicycles, their basic design remaining unchanged since the 1880s, and their significance in daily life worldwide. Therefore, the main intention of the author is to provide information about the history and importance of bicycles, making choice B the most appropriate. Choices A, C, and D are incorrect as they are not supported by the content of the text, which focuses on the history and significance of bicycles rather than promoting moving to China, engaging in mountain biking, or suggesting that bicycles are the only way to exercise.
Blood Pressure Regulators
The body is composed of systems that have evolved and diversified in order to maintain the natural functions and processes they regulate. One such system that has these regulators is the bodyÄ€™s cardiovascular system. The bodyÄ€™s pump, which regulates the flow of vitally needed oxygen to all cells of the body, as well as the discard of carbon dioxide and other waste products, is the heart.
Because blood pressure varies at different points within the body, differing components are needed to keep the bodyÄ€™s blood pressure regulated. Three of the basic components are baroreceptors, chemoreceptors, and the kidneys.
Baroreceptors are stretch receptors composed of fine branching nerve endings and are contained along the walls of the arteries near the heart and in other areas of the body as well. Impulses are related to this stretching along the arterial walls, which causes these baroreceptors to send out even more impulses to the heart, arteries, and veins, causing the blood pressure to go either up or down.
Chemoreceptors are located along the walls of the arteries and monitor changes in oxygen level, carbon dioxide, and pH. Just think! A fall in oxygen causes receptors to send impulses to raise the blood pressure.
The kidneys play a role in regulating blood pressure by absorbing salts and water and removing wastes. Hormones secreted by the adrenal cortex cause the kidney to keep or let go of any salt and water. This has an influence on blood volume and consequently on blood pressure.
What is the primary purpose of this passage?
- A. To inform the reader about the dangers of high blood pressure
- B. To inform the reader how high blood pressure leads to a higher risk of heart attack
- C. To inform the reader how the cardiovascular system regulates blood pressure
- D. To persuade the reader that controlling one's blood pressure is important
Correct Answer: C
Rationale: The primary purpose of this passage is to inform the reader about how the cardiovascular system regulates blood pressure. The text explains the role of various components such as baroreceptors, chemoreceptors, and the kidneys in maintaining blood pressure within the body. It focuses on the mechanisms and functions of these regulators rather than discussing the dangers of high blood pressure, its link to heart attacks, or persuading the reader to control their blood pressure.
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