Reading Comprehension

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The Moon has been worshipped by primitive peoples and has inspired humans to create everything from lunar calendars to love sonnets. But what do we really know about it? The most accepted theory about the Moon's origin is that it was formed from the debris of a massive collision with the young Earth about 4.6 billion years ago. A huge body, perhaps the size of Mars, struck the Earth, throwing out an immense amount of debris that coalesced and cooled in orbit around the Earth.The development of Earth is inextricably linked to the Moon; the Moon's gravitational influence upon the Earth is the primary cause of ocean tides. In fact, the Moon has more than twice the effect on the tides than the Sun. The Moon makes one rotation and completes a revolution around the Earth every 27 days, 7 hours, and 43 minutes. This synchronous rotation is caused by an uneven distribution of mass in the Moon (essentially, it is heavier on one side than the other) and has allowed the Earth's gravity to keep one side of the Moon permanently facing Earth.The average distance from Earth to the Moon is about 384,403 km. The Moon has no atmosphere; without it, the Moon has no protection from meteorite impacts, resulting in a surface covered with impact craters, both large and small. The Moon also has no active tectonic or volcanic activity, so the erosive effects of atmospheric weathering, tectonic shifts, and volcanic upheavals that tend to erase and reform the Earth’s surface features are not at work on the Moon. In fact, even tiny surface features, such as the footprint left by an astronaut in the lunar soil, are likely to last for millions of years unless obliterated by a chance meteorite strike. The surface gravity of the Moon is about one-sixth that of Earth's. Therefore, a person weighing 82 kilograms on Earth would only weigh 14 kilograms on the Moon. The geographical features of the Earth most similar to those of the Moon are places such as the Hawaiian volcanic craters and the huge meteor crater in Arizona. However, the climate of the Moon is very different from either Hawaii or Arizona; in fact, the temperature on the Moon ranges from 123 degrees Celsius to -233 degrees Celsius.

What is the passage primarily about?

  • A. What we know about the Moon and its differences from Earth
  • B. A comparison of the Moon and Earth
  • C. The Moon's effect on Earth
  • D. The origin of the Moon
Correct Answer: A

Rationale: The passage primarily discusses various aspects of the Moon, what is known about it, and how it differs from Earth. It covers topics such as the Moon's formation, gravitational influence on Earth, lack of atmosphere, surface features, gravity, and climate. While it mentions the Moon's origin and its effect on Earth, the main focus is on providing information about the Moon and highlighting its distinctions from Earth.

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Have you ever wondered why the whistle of a traveling, distant locomotive predicts its approach several yards before anyone actually sees it? Or why an oncoming ambulance's screaming siren is heard momentarily several feet before the ambulance comes into full view, before it passes you, and why its siren is still heard faintly well after the ambulance is out of sight?
What you are witnessing is a scientific phenomenon known as the Doppler Effect. What takes place is truly remarkable. In both of these instances, when the train or ambulance moves toward the sound waves in front of it, the sound waves are pulled closer together and have a higher frequency. In either instance, the listener positioned in front of the moving object hears a higher pitch. The ambulance and locomotive are progressively moving away from the sound waves behind them, causing the waves to be farther apart and to have a lower frequency. These fast-approaching modes of transportation distance themselves past the listener, who hears a lower pitch.

What is the main idea of the passage?

  • A. Trains and ambulances emit loud noises.
  • B. Low-frequency waves produce high-pitched sounds.
  • C. High-frequency waves result in low-pitched sounds.
  • D. The Doppler Effect explains why sound is heard more strongly initially and then faintly after a moving object has passed.
Correct Answer: D

Rationale: The main idea of the passage is to explain the scientific phenomenon known as the Doppler Effect. The passage describes how when a train or ambulance moves towards a listener, sound waves are compressed, resulting in a higher frequency and pitch. Conversely, as the objects move away, the sound waves stretch, leading to a lower frequency and pitch. The Doppler Effect is the reason why sound is heard louder as the object approaches and then fades as it moves away. This explanation aligns with choice D, making it the correct answer.

The regulation of dietary supplements falls under the jurisdiction of the United States Food and Drug Administration (FDA), which applies different standards compared to those governing prescription and over-the-counter medications. In general, the regulations for dietary supplements are less stringent. Manufacturers are not required to demonstrate the safety or effectiveness of a dietary supplement prior to its marketing. However, they are allowed to make claims about addressing nutrient deficiencies, supporting health, or being associated with specific bodily functions, provided that research backs these assertions. These claims must be accompanied by a disclaimer stating, “This statement has not been evaluated by the Food and Drug Administration. This product is not intended to diagnose, treat, cure, or prevent any disease.” Additionally, manufacturers are expected to adhere to good manufacturing practices (GMPs) to ensure consistent processing and quality standards, with requirements that took effect in 2008 for larger manufacturers and are being phased in for smaller ones by 2010. Once a dietary supplement is available on the market, the FDA monitors its safety and product information, including label claims and package inserts. If a product is deemed unsafe, the FDA has the authority to take action against the manufacturer or distributor, which may include issuing warnings or requiring product removal. The Federal Trade Commission (FTC) oversees advertising regulations, ensuring that all promotional materials are truthful and not misleading. Consequently, the federal government has pursued legal action against numerous dietary supplement promoters or websites that have made false claims or marketed unsafe products.

What does the phrase 'phased in' mean as it is used in the third paragraph?

  • A. stunned into silence
  • B. confused
  • C. implemented in stages
  • D. legalized
Correct Answer: C

Rationale: The phrase 'phased in' means implemented in stages. In this context, it refers to the gradual introduction or implementation of requirements for good manufacturing practices (GMPs) for small manufacturers over a period of time. It does not signify being stunned into silence, confused, or legalized, but rather a methodical and gradual approach to enforcing regulations.

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.

After reading this article, the reader learns that

  • A. bicycles break down because of the moving parts.
  • B. bicycles are only found in China.
  • C. bicycling is gaining in popularity all over the world.
  • D. BMX bicycling is dangerous.
Correct Answer: C

Rationale: The correct answer is C: bicycling is gaining in popularity all over the world. This is evident from the article's mention of bicycles being a steady source of exercise and entertainment for both children and adults, as well as the statement that bicycles are coming back in high demand globally. This choice aligns with the information provided in the text, highlighting the increasing popularity of bicycling worldwide.

Choices A, B, and D are incorrect. Choice A is incorrect because the article does not mention that bicycles break down due to their moving parts; rather, it emphasizes that bicycles are complex yet simple machines. Choice B is incorrect as the article clearly states that bicycles are not only found in China, but are a necessary part of daily existence in many countries worldwide. Choice D is incorrect because the article does not explicitly state that BMX bicycling is dangerous; it simply mentions that BMX biking is similar to cross-country motorcycle racing.

People of Hispanic origin were on the North American continent centuries before settlers arrived
from Europe in the early 1600s and the thirteen colonies joined together to form the United
States in the late 1700s. The first census of the new nation was conducted in 1790, and counted about four million people, most of whom were white. Of the white citizens, more than 80%
traced their ancestry back to England. There were close to 700,000 slaves and about 60,000 "free Negroes". Only a few Native American Indians who paid taxes were included in the census count, but the total Native American population was probably about one million. By 1815, the population of the United States was 8.4 million. Over the next 100 years, the
country took in about 35 million immigrants, with the greatest numbers coming in the late 1800s and early 1900s. In 1882, 40,000 Chinese arrived, and between 1900 and 1907, there were more
than 30,000 Japanese immigrants. But by far, the largest numbers of the new immigrants were
from central, eastern, and southern Europe. An enormous amount of racial and ethnic assimilation has taken place in the United States. In 1908, play-write Israel Zangwill first used the term "melting pot" to describe the concept of a place where many races melted in a crucible and re-formed to populate a new land. Some years during the first two decades of the 20th century, there were as many as one million new
immigrants per year, an astonishing 1 percent of the total population of the United States.
In 1921, however, the country began to limit immigration, and the Immigration Act of 1924
virtually closed the door. The total number of immigrants admitted per year dropped from as many as a million to only 150,000. A quota system was established that specified the number of
immigrants that could come from each country. It heavily favored immigrants from northern and western Europe and severely limited everyone else. This system remained in effect until 1965, although after World War II, several exceptions were made to the quota system to allow in
groups of refugees.

Why did the author write the passage?

  • A. to outline the ways immigration has been restricted
  • B. to emphasize the impact of migrants from Europe
  • C. to explain and give examples of the concept of a 'melting pot'
  • D. to summarize the main features of immigration
Correct Answer: D

Rationale: The correct answer is D because the passage provides a comprehensive overview of the history of immigration in the United States. It covers various aspects such as the origins of different ethnic groups, the influx of immigrants from Europe and Asia, the term 'melting pot,' and the evolution of immigration policies over time. The passage summarizes key features of immigration, including population numbers, demographic groups, major immigrant waves, and changes in immigration laws. Therefore, the main purpose of the passage is to summarize the main features of immigration in the United States.

Laughter: One of the best ways to understand a group of people is to know what makes them laugh. Laughter encompasses the limits of the soul and serves social, psychological, and physiological functions. In humor, life is redefined and accepted. Irony and satire provide much deeper insights into a group's collective psyche and values than do years of research. It has always been a great disappointment to Native Americans that the humorous side of their life has not been mentioned by experts on Native American affairs. Rather, the image of the stern-faced redskin has been presented by the American Westerns.

Which statement is presented in the paragraph?

  • A. Native American humor is mostly satire.
  • B. White Americans neglect the needs of the Native Americans.
  • C. Native Americans rarely laugh.
  • D. Native American humor is often overlooked.
Correct Answer: D

Rationale: The correct answer is D: Native American humor is often overlooked. This is supported by the passage stating that it has been a great disappointment to Native Americans that their humorous side has not been mentioned by experts on Native American affairs. This implies that Native American humor is not given the attention it deserves.

A is incorrect because the passage does not specify that Native American humor is mostly satire. B is incorrect as it is too broad and not directly supported by the passage. C is incorrect as the passage does not state that Native Americans rarely laugh, but rather that their humorous side is overlooked. Thus, the correct answer is D based on the evidence provided in the passage.

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