Please note: These practice sets align with TOEFL iBT
tests administered on or after July 26, 2023.

TOEFL iBT® Reading Practice Questions
This document may contain some question types that would not appear on a test that has been adapted for various
accessibility purposes. On test day, you will receive an accessible assessment that is consistent with any
accommodations for which you have been approved.

Reading Practice Set 1
Directions: Read the passage. Give yourself 18 minutes to complete this practice set.
The Rise of TeotihuacánParagraph
1 The city of Teotihuacán, which lay about 50 kilometers northeast of modern-day Mexico City,
began its growth by 200–100 B.C. At its height, between about A.D. 150 and 700, it probably
had a population of more than 125,000 people and covered at least 20 square kilometers. It
had over 2,000 apartment complexes, a great market, a large number of industrial workshops,
an administrative center, a number of massive religious edifices, and a regular grid pattern ofstreets and buildings. Clearly, much planning and central control were involved in the
expansion and ordering of this great metropolis. Moreover, the city had economic and perhaps
religious contacts with most parts of Mesoamerica (modern Central America and Mexico).
2 How did this tremendous development take place, and why did it happen in the Teotihuacán
Valley? Among the main factors are Teotihuacán’s geographic location on a natural traderoute to the south and east of the Valley of Mexico, the obsidian1 resources in the
Teotihuacán Valley itself, and the valley’s potential for extensive irrigation. The exact role ofother factors is much more difficult to pinpoint—for instance, Teotihuacán’s religious
significance as a shrine, the historical situation in and around the Valley of Mexico toward
the end of the first millennium B.C., the ingenuity and foresightedness of Teotihuacán’s elite,
and, finally, the impact of natural disasters, such as the volcanic eruptions of the late firstmillennium B.C.

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3 This last factor is at least circumstantially implicated in Teotihuacán’s rise. Prior to 200 B.C.,
a number of relatively small centers coexisted in and near the Valley of Mexico. Around thistime, the largest of these centers, Cuicuilco, was seriously affected by a volcanic eruption,with much of its agricultural land covered by lava. With Cuicuilco eliminated as a potential
rival, any one of a number of relatively modest towns might have emerged as a leading
economic and political power in Central Mexico. The archaeological evidence clearly
indicates, though, that Teotihuacán was the center that did arise as the predominant force inthe area by the first century A.D.
4 It seems likely that Teotihuacán’s natural resources—along with the city elite’s ability torecognize their potential—gave the city a competitive edge over its neighbors. The valley, likemany other places in Mexican and Guatemalan highlands, was rich in obsidian. The hard
volcanic stone was a resource that had been in great demand for many years, at least since therise of the Olmecs (a people who flourished between 1200 and 400 B.C.), and it apparently
had a secure market. Moreover, recent research on obsidian tools found at Olmec sites has
shown that some of the obsidian obtained by the Olmecs originated near Teotihuacán.
Teotihuacán obsidian must have been recognized as a valuable commodity for many centuries
before the great city arose.
5 Long-distance trade in obsidian probably gave the elite residents of Teotihuacán access to awide variety of exotic goods, as well as a relatively prosperous life. Such success may haveattracted immigrants to Teotihuacán. In addition, Teotihuacán’s elite may have consciously
attempted to attract new inhabitants. It is also probable that as early as 200 B.C. Teotihuacán
may have achieved some religious significance and its shrine (or shrines) may have served as
an additional population magnet. Finally, the growing population was probably fed byincreasing the number and size of irrigated fields.
6 The picture of Teotihuacán that emerges is a classic picture of positive feedback among
obsidian mining and working, trade, population growth, irrigation, and religious tourism. The
thriving obsidian operation, for example, would necessitate more miners, additional
manufacturers of obsidian tools, and additional traders to carry the goods to new markets. All
this led to increased wealth, which in turn would attract more immigrants to Teotihuacán. The
growing power of the elite, who controlled the economy, would give them the means tophysically coerce people to move to Teotihuacán and serve as additions to the labor force.
More irrigation works would have to be built to feed the growing population, and this resulted
in more power and wealth for the elite.
1

obsidian: a type of volcanic glasslike rock used for manufacturing tools and ceremonial objects

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Directions: Answer the questions.
1. In paragraph 1, each of the following is mentioned as a feature of the city of
Teotihuacán between A.D. 150 and 700 EXCEPT
A regularly arranged streets
B several administrative centers spread across the city
C many manufacturing workshops
D apartment complexes
2. The word “ingenuity” in paragraph 2 is closest in meaning toA ambition
B sincerity
C faithD cleverness
3. Which of the following is NOT mentioned in paragraph 2 as a main factor in thedevelopment of Teotihuacán?
A The presence of obsidian in the Teotihuacán Valley
B The potential for extensive irrigation of Teotihuacán Valley lands
C A long period of volcanic inactivity in the Teotihuacán Valley
D Teotihuacán’s location on a natural trade route
4. What can be inferred from paragraph 3 about Cuicuilco prior to 200 B.C.?
A It was a fairly small city until that date.
B It was located outside the Valley of Mexico.
C It emerged rapidly as an economical and political center.
D Its economy relied heavily on agriculture.
5. Which of the following allowed Teotihuacán to have “a competitive edge over its
neighbors”?
A A well-exploited and readily available commodity
B The presence of a highly stable elite class
C Knowledge derived directly from the Olmecs about the art of toolmaking
D Scarce natural resources in nearby areas such as those located in what are now the
Guatemalan and Mexican highlands

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6. According to paragraph 4, what has recent research on obsidian tools found at Olmec
sites shown?
A Obsidian’s value was understood only when Teotihuacán became an important city.
B The residents of Teotihuacán were sophisticated toolmakers.
C The residents of Teotihuacán traded obsidian with the Olmecs as early as 400 B.C.
D Some of the obsidian used by the Olmecs came from the area around Teotihuacán.
7. Select the TWO answer choices that are mentioned in paragraph 5 as being features of
Teotihuacán that may have attracted immigrants to the city. To receive credit, you mustselect TWO answers.
A The prosperity of the elite
B Plenty of available housing
C Opportunities for well-paid agricultural employment
D The presence of one or more religious shrines
8. In paragraph 6, the author discusses “The thriving obsidian operation” in order toA explain why manufacturing was the main industry of Teotihuacán
B give an example of an industry that took very little time to develop in Teotihuacán
C illustrate how several factors influenced each other to make Teotihuacán a powerful andwealthy city
D explain how a successful industry can be a source of wealth and a source of conflict at thesame time

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9. In paragraph 1 of the passage, there is a missing sentence. The paragraph is repeatedbelow and shows four letters (A, B, C, and D) that indicate where the following sentence
could be added.
In fact, artifacts and pottery from Teotihuacán have been discovered in sites as far
away as the Mayan lowlands, the Guatemalan highlands, northern Mexico, and the
Gulf Coast of Mexico.
Where would the sentence best fit?
The city of Teotihuacán, which lay about 50 kilometers northeast of modern-day Mexico
City, began its growth by 200–100 B.C. At its height, between about A.D. 150 and 700, it
probably had a population of more than 125,000 people and covered at least 20 square
kilometers. (A) It had over 2,000 apartment complexes, a great market, a large number ofindustrial workshops, an administrative center, a number of massive religious edifices, and a
regular grid pattern of streets and buildings. (B) Clearly, much planning and central control
were involved in the expansion and ordering of this great metropolis. (C) Moreover, the city
had economic and perhaps religious contacts with most parts of Mesoamerica (modern
Central America and Mexico). (D)A Option A
B Option B
C Option C
D Option D

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10. Directions: An introductory sentence for a brief summary of the passage is provided
below. Complete the summary by selecting the THREE answer choices that express themost 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.
Write your answer choices in the spaces where they belong. You can either write the letter ofyour answer choice or you can copy the sentence.
Teotihuacán was a highly developed city in Mesoamerica that reached its peak between
about A.D. 150 and 700.
•••

Answer Choices
A The number and sophistication of the architectural, administrative, commercial, andreligious features of Teotihuacán indicate the existence of centralized planning andcontrol.
B Teotihuacán may have developed its own specific local religion as a result of the culturaladvances made possible by the city’s great prosperity.
C Several factors may account for Teotihuacán’s extraordinary development, including its
location, rich natural resources, irrigation potential, intelligent elite, and the misfortune ofrival communities.
D As a result of its large number of religious shrines, by the first century A.D., Teotihuacán
became the most influential religious center in all of Mesoamerica.
E In many important areas, from the obsidian industry to religious tourism, Teotihuacán’s
success and prosperity typified the classic positive feedback cycle.
F Although many immigrants settled in Teotihuacán between A.D. 150 and 700, the increasing threatof coerced labor discouraged further settlement and limited Teotihuacán’s population growth.

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Reading Practice Set 1
Answers
1. B
2. D
3. C
4. D
5. A
6. D
7. A, D
8. C
9. D
10. A, C, E

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Reading Practice Set 2
Directions: Read the passage. Give yourself 18 minutes to complete this practice set.
Extinction of the Dinosaurs
Paleozoic Era

334 to 248 million years ago

Mesozoic Era 245 to 65 million years ago
─Triassic Period
─Jurassic Period
─Cretaceous Period
Cenozoic Era 65 million years ago to the present

Paragraph
1 Paleontologists have argued for a long time that the demise of the dinosaurs was caused byclimatic alterations associated with slow changes in the positions of continents and seas
resulting from plate tectonics. Off and on throughout the Cretaceous (the last period of the
Mesozoic era, during which dinosaurs flourished), large shallow seas covered extensive areasof the continents. Data from diverse sources, including geochemical evidence preserved inseafloor sediments, indicate that the Late Cretaceous climate was milder than today’s. The
days were not too hot, nor the nights too cold. The summers were not too warm, nor the
winters too frigid. The shallow seas on the continents probably buffered the temperature of the
nearby air, keeping it relatively constant.
2 At the end of the Cretaceous, the geological record shows that these seaways retreated fromthe continents back into the major ocean basins. No one knows why. Over a period of about
100,000 years, while the seas pulled back, climates around the world became dramaticallymore extreme: warmer days, cooler nights; hotter summers, colder winters. Perhaps dinosaurs
could not tolerate these extreme temperature changes and became extinct.
3 If true, though, why did cold-blooded animals such as snakes, lizards, turtles, and crocodiles
survive the freezing winters and torrid summers? These animals are at the mercy of theclimate to maintain a livable body temperature. It’s hard to understand why they would not beaffected, whereas dinosaurs were left too crippled to cope, especially if, as some scientists
believe, dinosaurs were warm-blooded. Critics also point out that the shallow seaways had
retreated from and advanced on the continents numerous times during the Mesozoic, so why
did the dinosaurs survive the climatic changes associated with the earlier fluctuations but notwith this one? Although initially appealing, the hypothesis of a simple climatic change related
to sea levels is insufficient to explain all the data.

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4 Dissatisfaction with conventional explanations for dinosaur extinctions led to a surprisingobservation that, in turn, has suggested a new hypothesis. Many plants and animals disappear
abruptly from the fossil record as one moves from layers of rock documenting the end of theCretaceous up into rocks representing the beginning of the Cenozoic (the era after the
Mesozoic). Between the last layer of Cretaceous rock and the first layer of Cenozoic rock,there is often a thin layer of clay. Scientists felt that they could get an idea of how long theextinctions took by determining how long it took to deposit this one centimeter of clay andthey thought they could determine the time it took to deposit the clay by determining theamount of the element iridium (Ir) it contained.
5 Ir has not been common at Earth’s surface since the very beginning of the planet’s history.
Because it usually exists in a metallic state, it was preferentially incorporated in Earth’s coreas the planet cooled and consolidated. Ir is found in high concentrations in some meteorites, inwhich the solar system’s original chemical composition is preserved. Even today, microscopic
meteorites continually bombard Earth, falling on both land and sea. By measuring how manyof these meteorites fall to Earth over a given period of time, scientists can estimate how longit might have taken to deposit the observed amount of Ir in the boundary clay. These
calculations suggest that a period of about one million years would have been required.
However, other reliable evidence suggests that the deposition of the boundary clay could nothave taken one million years. So the unusually high concentration of Ir seems to require a
special explanation.
6 In view of these facts, scientists hypothesized that a single large asteroid, about 10 to 15
kilometers across, collided with Earth, and the resulting fallout created the boundary clay.
Their calculations show that the impact kicked up a dust cloud that cut off sunlight for several
months, inhibiting photosynthesis in plants; decreased surface temperatures on continents to
below freezing; caused extreme episodes of acid rain; and significantly raised long-term
global temperatures through the greenhouse effect. This disruption of the food chain andclimate would have eradicated the dinosaurs and other organisms in less than fifty years.

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Directions: Answer the questions.
1. According to paragraph 1, which of the following is true of the Late Cretaceous
climate?
A Summers were very warm and winters were very cold.
B Shallow seas on the continents caused frequent temperature changes.
C The climate was very similar to today’s climate.
D The climate did not change dramatically from season to season.
2. Why does the author mention the survival of “snakes, lizards, turtles, and crocodiles”
in paragraph 3 ?
A To argue that dinosaurs may have become extinct because they were not cold-blooded
animals
B To question the adequacy of the hypothesis that climatic change related to sea levels
caused the extinction of the dinosaurs
C To present examples of animals that could maintain a livable body temperature moreeasily than dinosaurs
D To support a hypothesis that these animals were not as sensitive to climate changes in the
Cretaceous period as they are today
3. According to paragraph 3, which of the following is true of changes in climate before
the Cretaceous period and the effect of these changes on dinosaurs?
A Climate changes associated with the movement of seaways before the Cretaceous period
did not cause dinosaurs to become extinct.
B Changes in climate before the Cretaceous period caused severe fluctuation in sea level,
resulting in the extinction of the dinosaurs.
C Frequent changes in climate before the Cretaceous period made dinosaurs better able tomaintain a livable body temperature.
D Before the Cretaceous period there were few changes in climate, and dinosaurs
flourished.
4. The word “fluctuations” in the passage is closest in meaning toA extremes
B retreats
C periods
D variations

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5. Which of the sentences below best expresses the essential information in the highlighted
sentence in paragraph 4 ? Incorrect choices change the meaning in important ways or
leave out essential information.
A The fossil record suggests that there was an abrupt extinction of many plants and animals
at the end of the Mesozoic era.
B Few fossils of the Mesozoic era have survived in the rocks that mark the end of theCretaceous.
C Fossils from the Cretaceous period of the Mesozoic up to the beginning of the Cenozoic
era have been removed from the layers of rock that surrounded them.
D Plants and animals from the Mesozoic era were unable to survive in the Cenozoic era.
6. In paragraph 4, all of the following questions are answered EXCEPT:
A Why is there a layer of clay between the rocks of the Cretaceous and Cenozoic?
B Why were scientists interested in determining how long it took to deposit the layer of clayat the end of the Cretaceous?
C What was the effect of the surprising observation scientists made?
D Why did scientists want more information about the dinosaur extinctions at the end of theCretaceous?
7. Paragraph 5 implies that a special explanation of the Ir in the boundary clay is needed
becauseA the Ir in microscopic meteorites reaching Earth during the Cretaceous period would havebeen incorporated into Earth’s core
B the Ir in the boundary clay was deposited much more than a million years ago
C the concentration of Ir in the boundary clay is higher than in microscopic meteorites
D the amount of Ir in the boundary clay is too great to have come from microscopic
meteorites during the time the boundary clay was deposited
8. The word “disruption” in the passage is closest in meaning toA exhaustion
B disturbanceC modification
D disappearance

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9. In paragraph 5 of the passage, there is a missing sentence. The paragraph is repeatedbelow and shows four letters (A, B, C, and D) that indicate where the following sentence
could be added.
Consequently, the idea that the Ir in the boundary clay came from microscopic
meteorites cannot be accepted.
Where would the sentence best fit?
Ir has not been common at Earth’s surface since the very beginning of the planet’s history.
Because it usually exists in a metallic state, it was preferentially incorporated in Earth’s coreas the planet cooled and consolidated. Ir is found in high concentrations in some meteorites,in which the solar system’s original chemical composition is preserved. Even today,
microscopic meteorites continually bombard Earth, falling on both land and sea. Bymeasuring how many of these meteorites fall to Earth over a given period of time, scientists
can estimate how long it might have taken to deposit the observed amount of Ir in theboundary clay. (A) These calculations suggest that a period of about one million years would
have been required. (B) However, other reliable evidence suggests that the deposition of theboundary clay could not have taken one million years. (C) So the unusually highconcentration of Ir seems to require a special explanation. (D)A Option A
B Option B
C Option C
D Option D

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10. Directions: An introductory sentence for a brief summary of the passage is provided
below. Complete the summary by selecting the THREE answer choices that express themost 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.
Write your answer choices in the spaces where they belong. You can either write the letter ofyour answer choice or you can copy the sentence.

For a long time scientists have argued that the extinction of the dinosaurs was related
to climate change.
•••

Answer Choices
A Extreme changes in daily and seasonal climates preceded the retreat of the seas back into
the major ocean basins.
B A simple climate change does not explain some important data related to the extinction of
the dinosaurs at the end of the Cretaceous.
C The retreat of the seaways at the end of the Cretaceous has not been fully explained.
D The abruptness of extinctions at the end of the Cretaceous and the high concentration of
Ir found in clay deposited at that time have fueled the development of a new hypothesis.
E Some scientists hypothesize that the extinction of the dinosaurs resulted from the effects
of an asteroid collision with Earth.
F Boundary clay layers like the one between the Mesozoic and Cenozoic are used by scientists todetermine the rate at which an extinct species declined.

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Reading Practice Set 2
Answers
1. D
2. B
3. A
4. D
5. A
6. A
7. D
8. B
9. C
10. B, D, E

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Reading Practice Set 3
Directions: Read the passage. Give yourself 18 minutes to complete this practice set.
The Geologic History of the Mediterranean
1 In 1970 geologists Kenneth J. Hsu and William B. F. Ryan were collecting research data
while aboard the oceanographic research vessel Glomar Challenger. An objective of thisparticular cruise was to investigate the floor of the Mediterranean and to resolve questions
about its geologic history. One question was related to evidence that the invertebrate fauna(animals without spines) of the Mediterranean had changed abruptly about 6 million years
ago. Most of the older organisms were nearly wiped out, although a few hardy species
survived. A few managed to migrate into the Atlantic. Somewhat later, the migrants returned,
bringing new species with them. Why did the near extinction and migrations occur?
2 Another task for the Glomar Challenger’s scientists was to try to determine the origin of thedomelike masses buried deep beneath the Mediterranean seafloor. These structures had been
detected years earlier by echo-sounding instruments, but they had never been penetrated in thecourse of drilling. Were they salt domes such as are common along the United States Gulf
Coast, and if so, why should there have been so much solid crystalline salt beneath the floor of
the Mediterranean?
3 With questions such as these clearly before them, the scientists aboard the Glomar Challenger
proceeded to the Mediterranean to search for the answers. On August 23, 1970, they
recovered a sample. The sample consisted of pebbles of hardened sediment that had once been
soft, deep-sea mud, as well as granules of gypsum1 and fragments of volcanic rock. Not asingle pebble was found that might have indicated that the pebbles came from the nearby
continent. In the days following, samples of solid gypsum were repeatedly brought on deck as
drilling operations penetrated the seafloor. Furthermore, the gypsum was found to possess
peculiarities of composition and structure that suggested it had formed on desert flats.
Sediment above and below the gypsum layer contained tiny marine fossils, indicating open
ocean conditions. As they drilled into the central and deepest part of the Mediterranean basin,
the scientists took solid, shiny, crystalline salt from the core barrel. Interbedded with the salt
were thin layers of what appeared to be windblown silt.

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4 The time had come to formulate a hypothesis. The investigators theorized that about 20
million years ago, the Mediterranean was a broad seaway linked to the Atlantic by two narrowstraits. Crustal movements closed the straits, and the landlocked Mediterranean began toevaporate. Increasing salinity caused by the evaporation resulted in the extermination ofscores of invertebrate species. Only a few organisms especially tolerant of very salty
conditions remained. As evaporation continued, the remaining brine (salt water) became sodense that the calcium sulfate of the hard layer was precipitated. In the central deeper part ofthe basin, the last of the brine evaporated to precipitate more soluble sodium chloride (salt).
Later, under the weight of overlying sediments, this salt flowed plastically upward to form salt
domes. Before this happened, however, the Mediterranean was a vast desert 3,000 metersdeep. Then, about 5.5 million years ago came the deluge. As a result of crustal adjustments
and faulting, the Strait of Gibraltar, where the Mediterranean now connects to the Atlantic,
opened, and water cascaded spectacularly back into the Mediterranean. Turbulent waters tore
into the hardened salt flats, broke them up, and ground them into the pebbles observed in thefirst sample taken by the Challenger. As the basin was refilled, normal marine organisms
returned. Soon layers of oceanic ooze began to accumulate above the old hard layer.
5 The salt and gypsum, the faunal changes, and the unusual gravel provided abundant evidence
that the Mediterranean was once a desert.
1

gypsum: a mineral made of calcium sulfate and water

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Directions: Answer the questions.
1. Which of the following is NOT mentioned in paragraph 1 as a change that occurred in
the fauna of the Mediterranean?
A Most invertebrate species disappeared during a wave of extinctions.
B A few hardy species wiped out many of the Mediterranean’s invertebrates.
C Some invertebrates migrated to the Atlantic Ocean.
D New species of fauna populated the Mediterranean when the old migrants returned.
2. What does the author imply by saying “Not a single pebble was found that might haveindicated that the pebbles came from the nearby continent”?
A The most obvious explanation for the origin of the pebbles was not supported by theevidence.
B The geologists did not find as many pebbles as they expected.
C The geologists were looking for a particular kind of pebble.
D The different pebbles could not have come from only one source.
3. Select the TWO answer choices from paragraph 3 that identify materials discovered in
the deepest part of the Mediterranean basin. To receive credit, you must select TWO
answers.
A Volcanic rock fragments
B Thin silt layers
C Soft, deep-sea mud
D Crystalline salt
4. What is the main purpose of paragraph 3 ?
A To describe the physical evidence collected by Hsu and Ryan
B To explain why some of the questions posed earlier in the passage could not be answeredby the findings of the Glomar Challenger
C To evaluate techniques used by Hsu and Ryan to explore the sea floor
D To describe the most difficult problems faced by the Glomar Challenger expedition
5. According to paragraph 4, which of the following was responsible for the evaporation of
the Mediterranean’s waters?
A The movements of Earth’s crust
B The accumulation of sediment layers
C Changes in the water level of the Atlantic Ocean
D Changes in Earth’s temperature

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6. The word “scores” in the passage is closest in meaning toA members
B large numbers
C populations
D different types
7. According to paragraph 4, what caused most invertebrate species in the Mediterranean
to become extinct?
A The evaporation of chemicals necessary for their survival
B Crustal movements that connected the Mediterranean to the saltier Atlantic
C The migration of new species through the narrow straits
D Their inability to tolerate the increasing salt content of the Mediterranean
8. Which of the sentences below best expresses the essential information in the highlighted
sentence in paragraph 4 ? Incorrect choices change the meaning in important ways or
leave out essential information.
A The Strait of Gibraltar reopened when the Mediterranean and the Atlantic became
connected and the cascades of water from one sea to the other caused crustal adjustments
and faulting.
B The Mediterranean was dramatically refilled by water from the Atlantic when crustal
adjustments and faulting opened the Strait of Gibraltar, the place where the two seas arejoined.
C The cascades of water from the Atlantic to the Mediterranean were not as spectacular as
the crustal adjustments and faulting that occurred when the Strait of Gibraltar wasconnected to those seas.
D As a result of crustal adjustments and faulting and the creation of the Strait of Gibraltar,
the Atlantic and Mediterranean were connected and became a single sea with spectacularcascades of water between them.

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9. In paragraph 2 of the passage, there is a missing sentence. The paragraph is repeatedbelow and shows four letters (A, B, C, and D) that indicate where the following sentence
could be added.
Thus, scientists had information about the shape of the domes but not about theirchemical composition and origin.
Where would the sentence best fit?
(A) Another task for the Glomar Challenger’s scientists was to try to determine the origin of
the domelike masses buried deep beneath the Mediterranean seafloor. B) These structures
had been detected years earlier by echo-sounding instruments, but they had never been
penetrated in the course of drilling. (C) Were they salt domes such as are common along theUnited States Gulf Coast, and if so, why should there have been so much solid crystalline saltbeneath the floor of the Mediterranean? (D)A Option A
B Option B
C Option C
D Option D

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10. Directions: An introductory sentence for a brief summary of the passage is provided
below. Complete the summary by selecting the THREE answer choices that express themost 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.
Write your answer choices in the spaces where they belong. You can either write the letter ofyour answer choice or you can copy the sentence.

An expedition to the Mediterranean answered some long-standing questions about theocean’s history.
•••

Answer Choices
A The Glomar Challenger expedition investigated changes in invertebrate fauna andsome unusual geologic features.
B Researchers collected fossils to determine which new species migrated from the Atlantic
with older species.
C Scientists aboard the Glomar Challenger were the first to discover the existence ofdomelike masses underneath the seafloor.
D Samples recovered from the expedition revealed important differences in chemicalcomposition and fossil distribution among the sediment layers.
E Evidence collected by the Glomar Challenger supports geologists’ beliefs that theMediterranean had evaporated and become a desert, before it refilled with water.
F Mediterranean salt domes formed after crustal movements opened the straits between the
Mediterranean and the Atlantic, and the Mediterranean refilled with water.

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Reading Practice Set 3
Answers
1. B
2. A
3. B, D
4. A
5. A
6. B
7. D
8. B
9. C
10. A, D, E

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