Sajjad1994
Over the past century, the United States population has continued to grow and so has the amount of hurricane activity along the Gulf and Atlantic coastlines. For meteorologists, a better understanding of storm frequency and characteristics can assist in hurricane forecasts, which in turn guides infrastructure planning and even insurance rates. Unfortunately, fewer than 200 years of historical weather records exist in the U.S., and in that time only a handful of category 5 hurricane—the most destructive tropical cyclones—have made landfall. This paucity of data presents a challenge in accurately predicting the likelihood of future devastating storms. Consequently, some researchers have turned to a relatively new field, paleotempestology, which examines geologic evidence of prehistoric hurricane landfalls to better understand the frequency with which they occur.
In one early study, Liu and Fearn extracted sediment samples from a lake in Louisiana that was isolated from the Gulf of Mexico by a narrow barrier beach: only a storm could cause water and materials to flow from the ocean to the lake. By analyzing the overwash layers, the layers of coarse beach sediment observable on the bottom of the lake, the scientists were able to produce a rough storm history for the region, dating back several thousand years. Some have questioned this method, however, as it does not conclusively verify the sediments’ provenance.
Another paleotempestological strategy relies on offshore-indicative foraminifera, single-celled organisms that are similarly thought to have arrived in a body of water via storm surges. Unlike sediments, which may be of unknown origin, if a species of foraminifera is native to the sea, its presence in a body of water adjacent to a barrier beach provides more compelling evidence as to the necessity of a historic storm. Nonetheless, Hippensteel’s and Martin’s method, too, must be qualified: scientists disagree about precisely which taxa are considered “offshore-indicative,” and dating methods used on foraminifera fossils merely demonstrate the age of the fossils, not necessarily when a hurricane might have occurred.
Although scientists have produced estimates of hurricane recurrence rates, the limitations of paleotempestological research temper the reliability of such predictions. Moreover, longterm changes in weather and climate affect the frequency of tropical storms, which further casts doubt on the field’s ability to relate past storm data to the potential for future hurricanes.
1. Which of the following best describes the organization of the passage?
A. After introducing an area of research, the author outlines its history and then casts doubt on its credibility.
B. The author describes a problem, evaluates two approaches to the problem, and then questions the usefulness of a field of study.
C. The author explains the origins of a scientific field and refutes potential criticisms to the field.
D. After comparing two methodologies, the author demonstrates why one is superior to the other.
E. After illustrating a scientific dilemma, the author explores differing perspectives on the dilemma and then reconciles the viewpoints.
2. According to the passage, which of the following is a potential drawback to the sediment analysis method mentioned in the second paragraph?
A. Scientists’ inability to easily access overwash layers deep below a lake
B. The difficulty in proving precisely where the sediments came from
C. Incomplete knowledge regarding what types of sediments might have oceanic origins
D. Disagreement among researchers as to the validity of fossil evidence
E. The lack of reliability in current methods for dating sediments
3. It can be inferred from the passage that the two research methods described in the passage have which of the following in common?
A. They involved bodies of water that were not connected to oceans.
B. They were conducted in Louisiana.
C. They did not provide useful paleotempestological data.
D. They used historical records in conjunction with ecological data to construct storm timelines.
E. Their validity has been rejected by most meteorologists.
4. Each of the following is mentioned as a potential benefit of paleotempestological research EXCEPT
A. the ability to predict hurricanes
B. accurate regional insurance rates
C. planning of structural facilities
D. a greater understanding of hurricane patterns
E. preventing destructive hurricanes
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2. B
3. A
4. E
1. Which of the following best describes the organization of the passage?
A. After introducing an area of research, the author outlines its history and then casts doubt on its credibility.
- Wrong - "outlines its history" is not discussed.
B. The author describes a problem, evaluates two approaches to the problem, and then questions the usefulness of a field of study.
- Correct - Best choice. Describes problem, two approches are discussed and last sentence as conclusion.
C. The author explains the origins of a scientific field and refutes potential criticisms to the field.
- Wrong - This is opposite.
D. After comparing two methodologies, the author demonstrates why one is superior to the other.
- Wrong - Author doesn't support any one.
E. After illustrating a scientific dilemma, the author explores differing perspectives on the dilemma and then reconciles the viewpoints.
- Wrong - He talks about two approaches not "differing perspectives on the dilemma"
Question 2
2. According to the passage, which of the following is a potential drawback to the sediment analysis method mentioned in the second paragraph?
A. Scientists’ inability to easily access overwash layers deep below a lake
- Wrong - Not mentioned
B. The difficulty in proving precisely where the sediments came from
- Correct - Drawback given "as it does not conclusively verify the sediments’ provenance."
C. Incomplete knowledge regarding what types of sediments might have oceanic origins
- Wrong - Not said
D. Disagreement among researchers as to the validity of fossil evidence
- Wrong - Disagreement is not drawback
E. The lack of reliability in current methods for dating sediments
- Wrong - Dating is sorted, the issue is with origin as mentioned in B.
Question 3
3. It can be inferred from the passage that the two research methods described in the passage have which of the following in common?
A. They involved bodies of water that were not connected to oceans.
- Correct - 1st one is lake and 2nd one "offshore-indicative foraminifera" is also not connected to oceans
B. They were conducted in Louisiana.
- Wrong - Place of 2nd one is not mentioned.
C. They did not provide useful paleotempestological data.
- Wrong - They did provide data but have some limitations
D. They used historical records in conjunction with ecological data to construct storm timelines.
- Wrong - historical records are not directly involved in both
E. Their validity has been rejected by most meteorologists.
- Wrong - Not stated directly
Question 4
4. Each of the following is mentioned as a potential benefit of paleotempestological research EXCEPT
A. the ability to predict hurricanes
- Wrong - Given as purpose of paleotempestological method
B. accurate regional insurance rates
- Wrong - From "For meteorologists, a better understanding of storm frequency and characteristics can assist in hurricane forecasts, which in turn guides infrastructure planning and even insurance rates. "
C. planning of structural facilities
- Wrong - From "For meteorologists, a better understanding of storm frequency and characteristics can assist in hurricane forecasts, which in turn guides infrastructure planning and even insurance rates. "
D. a greater understanding of hurricane patterns
- Wrong - From "For meteorologists, a better understanding of storm frequency and characteristics can assist in hurricane forecasts, which in turn guides infrastructure planning and even insurance rates. "
E. preventing destructive hurricanes
- Correct - paleotempestological can't prevent but just predict and help with other benefits