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5556 questions

Question 1421Question

Read the passage below. Which word most precisely and clearly completes the sentence to show that the architect's plans were detailed and explicit? Fill in the blank.

Fill in the blanks below

Before construction could begin, the architect had to the exact measurements of the building's foundation.
Show answer & explanation

Answer

specify
The correct answer must precisely convey the action of detailing exact measurements in a technical context. Words like 'specify', 'detail', or 'define' accurately indicate that the architect is providing explicit instructions rather than just general ideas.

Step-by-Step Solution

1
Analyze the context of the sentence.
The sentence discusses an architect preparing for construction by providing exact measurements of a foundation.
Understanding the context helps identify the level of detail and precision required.
2
Identify a word that precisely conveys making measurements detailed and explicit.
The word 'specify' or 'detail' fits perfectly because it means to identify clearly and definitely.
Choosing a precise word ensures clarity in technical or formal contexts, which is key to mastering word precision.

Key Concept

Word Precision and Clarity
Estimated Time:45s
Question 1422Question

In 1826, Nicéphore Niépce produced the oldest surviving photograph, which originally required an initial exposure period of eight hours in the sun.

Which of the following options is the best revision of the underlined portion?

Show answer & explanation

Answer: which required an exposure period of eight hours in the sun.

Answer

The option that states 'which required an exposure period of eight hours in the sun.' is the correct answer because it removes the redundant synonyms 'originally' and 'initial' while maintaining the proper subordinate clause structure.
The correct option removes the unnecessary words 'originally' and 'initial,' which are redundant because they both describe the start of the process. It maintains a grammatically correct dependent clause introduced by the relative pronoun 'which' to describe the photograph.

Step-by-Step Solution

1
Analyze the underlined portion for redundancy.
The words 'originally' and 'initial' are identified as synonyms that repeat the same concept of the beginning of the requirement.
Identifying synonymous terms in close proximity helps locate redundancy errors.
2
Evaluate the options to find the one that removes the redundancy.
The option omitting both 'originally' and 'initial' is the most concise and direct.
The correct choice must be the most concise option that preserves the sentence's intended meaning.
3
Check the remaining options for grammatical correctness.
The option starting with 'it' is incorrect because it creates a comma splice. The option containing a semicolon before 'because' is incorrect because it creates a dependent clause fragment.
Eliminating options that introduce new grammatical errors ensures only the grammatically correct, concise option is chosen.

Key Concept

Eliminating redundancy involves removing unnecessary words or phrases that repeat information already expressed or implied in the sentence.
Question 1423Question

[1] In the mid-1980s, French botanist Patrick Blanc revolutionized urban architecture by popularizing the *mur végétal*, or vertical garden. [2] Unlike traditional ivy-covered walls, which can damage brickwork with their roots, Blanc's design uses a structural frame, a PVC layer, and a felt lining that supports plants without soil. [3] The felt is continuously irrigated with nutrient-rich water, allowing a diverse array of species to thrive. [4] Today, his towering green walls cover the facades of museums, shopping centers, and private residences worldwide, offering both aesthetic beauty and natural insulation.

The writer is considering adding the following sentence to the end of the paragraph (after sentence [4]):

'Some of these plants, such as certain species of ferns and mosses, require high levels of humidity to survive.'

Should the writer make this addition?

Show answer & explanation

Answer: No, because it interrupts the paragraph's discussion of the structural design and benefits of the vertical gardens with a tangential detail about the care of specific plants.

Answer

The paragraph should not be added because it deviates from the main focus on structural design and general benefits of vertical gardens by introducing minor, specific requirements of certain plants.
The correct option correctly identifies that the proposed sentence should not be added because it interrupts the paragraph's discussion with a tangential detail. The paragraph focuses on the structural innovation and global success of Patrick Blanc's vertical gardens, and details about humidity requirements for specific plants are off-topic.

Step-by-Step Solution

1
Analyze the main focus of the existing paragraph.
The paragraph describes Patrick Blanc's structural design for vertical gardens and their aesthetic and insulating benefits.
Understanding the paragraph's core topic is essential to determine if the proposed addition is relevant.
2
Evaluate the function of the proposed sentence.
The proposed sentence introduces a specific detail about the humidity needs of ferns and mosses.
This helps determine whether the sentence adds value or distracts from the paragraph's main theme.
3
Determine if the sentence should be added and select the correct option.
The sentence should not be added because it is a tangential detail that interrupts the discussion of structure and benefits. The option stating this is the correct choice.
Matching this reasoning to the choices yields the correct answer.

Key Concept

Evaluating whether a proposed sentence adds relevant support or introduces a tangential distraction to the paragraph's core focus.
Estimated Time:1m 15s
Question 1424Question

For over forty years, the legendary violinist had performed exclusively on a 1715 Stradivarius, making it incredibly difficult for him to part from the instrument upon his retirement.

Which choice is the most idiomatic expression to replace the underlined portion?

Show answer & explanation

Answer: part with

Answer

part with
The correct idiomatic expression for relinquishing ownership or giving up a physical possession is 'part with'. Since a violin is an object, the preposition 'with' must be paired with the verb 'part'.

Step-by-Step Solution

1
Identify the relationship between the verb 'part' and the object 'the instrument' to determine the correct idiomatic preposition.
The sentence describes giving up a physical possession (a Stradivarius violin).
English idioms distinguish between separating from a person ('part from') and giving up an object ('part with').
2
Select the option that pairs the verb 'part' with the correct preposition for objects.
The phrase 'part with' is chosen.
This is the standard English idiom for relinquishing possession of an item.

Key Concept

Idiomatic preposition usage with the verb 'part' when referring to objects versus people.
Question 1425Question

Passage Excerpt:

In 1931, Harry Beck, a temporary draftsman for the London Underground, designed a revolutionary schematic diagram of the transit system. Rather than attempting to show geographical accuracy, Beck created a map that resembled a simplified circuit diagram, with straight lines and clean angles. [1] This design prioritized clarity and utility for commuters navigating the growing network.

The writer wants to add a sentence at Point [1] that provides a specific, concrete detail illustrating how Beck's map simplified the actual geography of London for commuters. Which choice best accomplishes this goal?

Show answer & explanation

Answer: He represented the winding Thames River as a simple horizontal line and spaced the central stations evenly, despite their actual geographic proximity.

Answer

The correct answer is the option that describes representing the Thames River as a simple horizontal line and spacing the central stations evenly.
The correct option directly satisfies the rhetorical goal by providing specific design elements (representing the Thames River as a simple horizontal line and spacing central stations evenly) that illustrate how the map simplified London's geography for passengers.

Step-by-Step Solution

1
Analyze the prompt to identify the specific rhetorical goal.
The goal is to provide a specific, concrete detail illustrating how Beck's map simplified London's actual geography.
This establishes the criteria for evaluating the choices.
2
Evaluate the choices against the identified rhetorical goal.
The options discussing the map's success or Beck's working hours fail to provide details of geographical simplification. The remaining options describe geographical changes.
This eliminates options that are off-topic or fail to meet the rhetorical criteria.
3
Examine the remaining options for grammatical correctness.
The option that joins the two details with a comma splice is grammatically incorrect. The option that describes representing the Thames as a simple horizontal line and spacing stations evenly is grammatically correct and fully satisfies the goal.
This ensures the final choice meets both rhetorical and grammatical standards.

Key Concept

Meeting Specific Rhetorical Goals
Estimated Time:1m 0s
Question 1426Question

The following paragraph is from an essay about transit history.

[1] In 1931, Harry Beck, a temporary draftsman for the London Underground, designed a revolutionary new map of the transit system. [2] Unlike previous maps, which plotted stations based on their true geographic locations, Beck's design was strictly schematic. [3] He realized that passengers traveling underground did not care about above-ground landmarks; they only needed to know how to navigate between stations and where to transfer. [4] This functional simplicity was initially rejected by the Underground's publicity department, which deemed the design too radical for the public. [5] Nevertheless, when a trial run of the pocket-sized map was distributed in 1933, it became an instant success.

For the sake of the logic and cohesion of the paragraph, the following sentence should be added:

"To achieve this schematic look, he represented the subway lines using only horizontal, vertical, or forty-five-degree diagonal paths."

Where is the most logical placement for this sentence?

Show answer & explanation

Answer: After Sentence 2

Answer

After Sentence 2
The correct placement is after Sentence 2. The target sentence begins with the transition phrase 'To achieve this schematic look,' which requires a preceding mention of a schematic design. Sentence 2 concludes by stating that 'Beck's design was strictly schematic,' providing the perfect logical antecedent. Additionally, the target sentence elaborates on how the map was schematic, serving as a bridge between the definition of the design in Sentence 2 and the rationale behind it in Sentence 3.

Step-by-Step Solution

1
Analyze the sentence to be inserted for logical markers and pronouns.
The target sentence contains the phrase 'this schematic look,' indicating it must follow a sentence that introduces the map's schematic nature.
Identifying transition words or demonstrative pronouns helps establish the necessary connection to the preceding text.
2
Scan the paragraph to locate the logical antecedent for the key phrase.
Sentence 2 states that 'Beck's design was strictly schematic,' providing the direct and necessary context for 'this schematic look.'
A demonstrative pronoun like 'this' must refer back to a noun or concept mentioned immediately prior.
3
Evaluate the surrounding sentences to ensure placing the sentence at the candidate spot does not disrupt the narrative flow.
Placing the sentence after Sentence 2 allows it to detail the schematic design before Sentence 3 explains the underlying reasoning and Sentence 4 introduces the rejection of 'This functional simplicity.'
Ensuring the overall cohesion of the paragraph prevents breaking other established logical transitions.

Key Concept

Identifying demonstrative pronoun antecedents and maintaining chronological/logical paragraph progression are essential for correct sentence placement.
Estimated Time:1m 0s
Question 1427Question

The following passage discusses the acoustics of ancient Greek theaters. Which word most precisely and contextually completes the sentence to maintain the formal, academic register of the passage?

Fill in the blanks below

Although the design of the Epidaurus theater has long been celebrated for its acoustic clarity, the exact mechanism behind this phenomenon remained elusive until modern researchers analyzed the site. Modern acoustic testing has revealed that the theater’s limestone seats act as a natural bandpass filter. Specifically, the ridged structure of the limestone steps serves to low-frequency environmental noise—such as the rustle of wind or the chatter of spectators—while simultaneously reinforcing the high-frequency sounds originating from the stage.
Show answer & explanation

Answer

attenuate
The correct word is 'attenuate'. In acoustics and wave physics, to attenuate means to reduce the amplitude, force, or value of a wave. Because the passage is written in a formal, academic register describing the scientific mechanism of a 'bandpass filter' that reduces 'low-frequency environmental noise' while 'reinforcing' other sounds, 'attenuate' is the most precise and contextually appropriate term.

Step-by-Step Solution

1
Analyze the context of the sentence to determine the semantic requirement of the missing word.
The target word must describe what the limestone steps do to 'low-frequency environmental noise' in contrast to 'reinforcing the high-frequency sounds'. Since it acts as a filter that reduces noise while reinforcing voices, the word must mean to reduce the amplitude, force, or intensity of a sound wave.
This establishes the physical and conceptual action of the verb required by the context.
2
Evaluate candidate words for tone, register, and precision in a scientific and acoustic context.
Words like 'soften' or 'hush' are too informal or literary. The word 'attenuate' is the precise scientific and academic term used in physics and acoustics to describe the reduction in force or intensity of a wave (such as sound).
This identifies the most precise word that maintains the formal, academic tone of the passage.

Key Concept

Selecting the most precise word that fits the context and maintains the appropriate tone and register.
Question 1428Question

Despite the critical acclaim of her latest novel, the author remained largely indifferent for the public praise, choosing instead to focus on her next writing project.

Which of the following choices best replaces the underlined portion to maintain idiomatic word choice?

Show answer & explanation

Answer: indifferent to

Answer

indifferent to
The adjective 'indifferent' must be paired with the preposition 'to' when expressing a lack of interest, concern, or sympathy. Thus, 'indifferent to' is the idiomatically correct choice.

Step-by-Step Solution

1
Identify the underlined phrase and the word that requires a prepositional partner.
The adjective 'indifferent' is followed by the preposition 'for' in the passage.
To determine if the original phrasing is correct or if it needs to be changed.
2
Evaluate the idiomatic combination of 'indifferent' with the prepositions in the options.
The correct idiomatic preposition to pair with 'indifferent' is 'to'.
Idiomatic usage requires specific prepositions to be paired with certain adjectives; 'indifferent' always pairs with 'to' when indicating lack of interest or concern.

Key Concept

Idiomatic prepositions require memorizing which prepositions correctly pair with specific verbs, adjectives, or nouns.
Question 1429Question

At the 1893 World's Columbian Exposition in Chicago, Josephine Cochrane showcased her newly invented automatic dishwasher. A top prize was won by the machine, which was because the judges were highly impressed by its design and efficiency.

Which choice is the best version of the underlined portion of the sentence?

Show answer & explanation

Answer: The machine won a top prize because the judges were impressed

Answer

The machine won a top prize because the judges were impressed
The correct choice is active, concise, and grammatically correct. It removes the wordy, passive construction of the original sentence by using the active verb 'won' and directly stating the cause with 'because the judges were impressed'.

Step-by-Step Solution

1
Identify the underlined portion and evaluate it for conciseness and clarity.
The original phrasing is found to be wordy and passive, indicating that a revision is needed to make the sentence direct and active.
ACT style favors active verbs and conciseness when grammatically correct.
2
Analyze the choices to find the one that is grammatically correct and the most concise.
The option stating 'The machine won a top prize because the judges were impressed' is concise, active, and grammatically complete. The option with 'the judges were impressed' creates a comma splice, and the option starting with 'Since' results in a sentence fragment.
Eliminating wordiness must not introduce grammatical errors like comma splices or sentence fragments.

Key Concept

Eliminating Wordiness
Estimated Time:1m 0s
Question 1430Question

The following passage discusses environmental conservation efforts in local communities. Read the passage and consider the register and meaning of the context. Which word most precisely and contextually fits the blank to maintain the formal register of the passage?

Fill in the blanks below

During the dry summer months, local authorities often ask residents to conserve water. By limiting outdoor watering and fixing leaks, communities can help their shared water supply for future use.
Show answer & explanation

Answer

The correct answer is 'preserve' (or accepted equivalents like 'save', 'conserve', or 'protect').
The correct answer is 'preserve' (or accepted equivalents like 'conserve' or 'save') because it precisely describes the action of keeping a resource safe and usable for the future without violating the formal register of the passage.

Step-by-Step Solution

1
Analyze the context of the sentence and the purpose of the blank space.
The blank requires a verb that describes keeping the shared water supply intact, safe, and available for the future.
Understanding the context helps determine the correct meaning and register required for the sentence.
2
Evaluate potential vocabulary choices for register and precision.
Words like 'preserve' or 'conserve' fit the formal tone of a public advisory and precisely describe protecting a resource.
Choosing a word that is appropriate in register prevents the text from sounding overly informal or dramatically exaggerated.

Key Concept

Selecting precise words that match the context and register of the passage.
Estimated Time:45s
Question 1431Question

A student is editing a draft of an essay about modern art history. Based on the paragraph below, which punctuation mark should be placed in the blank to ensure the sentence is punctuated correctly?

Fill in the blanks below

The Mexican painter Frida Kahlo—best known for her uncompromising and vividly colored self-portraits focused her work on themes of identity, the human body, and death. Although she was active in the mid-twentieth century, her artwork did not receive widespread international acclaim until decades after her passing. Today, she is celebrated worldwide as a pioneer of modern art.
Show answer & explanation

Answer

A dash (—) is required to close the nonessential phrase because it was opened with a matching dash.
The sentence contains a nonessential explanatory phrase set off by punctuation. Because the phrase is introduced with a dash, a matching dash must be used to close the phrase to maintain punctuation consistency.

Step-by-Step Solution

1
Identify the nonessential explanatory phrase within the main clause.
The phrase 'best known for her uncompromising and vividly colored self-portraits' is a nonessential modifier describing Frida Kahlo.
Nonessential phrases provide extra information that can be removed without changing the core grammatical structure of the sentence.
2
Examine the punctuation mark that opens the nonessential phrase.
The phrase is introduced with an em dash (—).
To maintain punctuation consistency, nonessential phrases must be enclosed by matching punctuation marks (two commas, two parentheses, or two dashes).
3
Determine the correct punctuation mark to close the nonessential phrase.
A matching em dash (—) must be placed in the blank.
Using a comma, semicolon, or parenthesis would create mismatched punctuation, violating consistency rules.

Key Concept

Dashes must be used in matching pairs when setting off parenthetical or nonessential information within a sentence.
Estimated Time:1m 0s
Question 1432Question

Passage

For decades, physicists believed that the gyroscopic effect—the force generated by spinning wheels—was the primary mechanism keeping a moving bicycle [1] <u>upright. Consequently,</u> researchers have recently constructed experimental bicycles with counter-rotating wheels that cancel out these gyroscopic forces, yet these bicycles remain perfectly stable.

Question 1
Which of the following choices most effectively establishes the logical relationship between the two sentences?

Show answer & explanation

Answer: upright. However,

Answer

upright. However,
The correct option, which uses the transition 'However,' properly establishes a contrast between the long-held belief that gyroscopic forces keep bicycles upright and the recent discovery that bicycles without these forces remain stable. Separating the two independent clauses with a period before the transition is grammatically correct.

Step-by-Step Solution

1
Analyze the logical relationship between the two sentences separated by the transition.
The first sentence states a long-held belief (that gyroscopic effects keep bicycles upright). The second sentence describes an experiment that challenges this belief (bicycles with canceled gyroscopic forces remain stable). This indicates a contrasting relationship.
Identifying the correct logical connection is necessary to choose the appropriate transition category.
2
Evaluate the transition options based on the identified relationship.
'Consequently' (cause-effect) and 'Furthermore' (addition) are incorrect. 'However' (contrast) correctly signals the shift in perspective.
Eliminating options that present incorrect logical relationships narrows down the choices.
3
Check the punctuation of the remaining options to ensure grammatical correctness.
The option containing a period before 'However' is correct because it separates two independent clauses. Joining them with a comma and 'however' creates a comma splice.
Ensuring the chosen transition follows proper sentence structure rules prevents punctuation errors.

Key Concept

Sentence-Level Transitions
Estimated Time:1m 0s
Question 1433Question

A writer is editing a passage about the history of eating utensils and has drafted the following paragraph:

For centuries, Western Europeans ate their meals using only knives, spoons, and their fingers. When the Byzantine princess Maria Argyropoulina arrived in Venice in 1004 to marry the Doge's son, she brought with her a set of golden, two-pronged forks, which she used to eat her food. [1] The Venetian clergy, however, condemned the implement as an insult to God, declaring that human hands were the only tools fit to touch the food created by the heavens. Consequently, forks did not gain widespread acceptance in Italy for another several centuries.

The writer is considering adding the following sentence at Point [1]:

Princess Maria was also known for her elaborate silk gowns and gold jewelry.

Should the writer make this addition at Point [1]?

Show answer & explanation

Answer: No, because it interrupts the paragraph's discussion of the fork's introduction to Venice with irrelevant personal details about the princess.

Answer

No, because it interrupts the paragraph's discussion of the fork's introduction to Venice with irrelevant personal details about the princess.
The correct option correctly identifies that the sentence should not be added because it introduces irrelevant details about Princess Maria's attire and jewelry. This information departs from the paragraph's central focus, which is the introduction of the fork and the controversy surrounding it.

Step-by-Step Solution

1
Analyze the main topic and focus of the paragraph.
The paragraph focuses on the introduction of the fork to Venice by Princess Maria, the Venetian clergy's negative reaction to the utensil, and the resulting delay in its acceptance.
Establishing the paragraph's main theme is necessary to evaluate if the proposed sentence is relevant.
2
Evaluate the content of the proposed sentence.
The proposed sentence discusses Princess Maria's clothing (silk gowns) and personal accessories (gold jewelry).
Determining what the proposed sentence is about allows us to compare it to the main topic of the paragraph.
3
Compare the proposed sentence with the paragraph's focus to determine if it should be added.
The details about the princess's gowns and jewelry are irrelevant to the history of the fork and disrupt the flow of the paragraph, so the sentence should not be added.
This comparison provides both the correct decision (No) and the correct justification (it interrupts the discussion with irrelevant details).

Key Concept

Evaluating Relevance for Adding or Deleting Content
Estimated Time:1m 30s
Question 1434Question

Using advanced X-ray phase-contrast tomography, researchers have successfully read ancient scrolls from Herculaneum without unrolling them. These scrolls, which were carbonized and turned to charcoal by the heat of Mount Vesuvius, contain lost works of Epicurean philosophy.

Which choice most effectively eliminates the redundancy in the underlined portion of the sentence?

Show answer & explanation

Answer: These scrolls, carbonized by the heat of Mount Vesuvius,

Answer

These scrolls, carbonized by the heat of Mount Vesuvius,
The correct choice removes the redundancy of having both 'carbonized' and 'turned to charcoal' (which have the same meaning in this context) and smoothly integrates the description as a participial phrase modifying the subject. This results in a concise, grammatically correct sentence.

Step-by-Step Solution

1
Identify the redundancy in the underlined portion of the sentence.
The words 'carbonized' and 'turned to charcoal' are synonyms that repeat the same idea, meaning one must be eliminated.
ACT English requires eliminating redundant words to ensure the text is as concise as possible while remaining grammatically correct.
2
Evaluate the options for conciseness and grammatical correctness.
The option containing 'carbonized by the heat' eliminates the repetition. Other choices introduce grammatical errors, such as fragments or comma splices.
Eliminating redundancy must not introduce new grammatical errors like fragments or run-on sentences.

Key Concept

Eliminating Redundancy
Estimated Time:45s
Question 1435Question

The writer is considering deleting Sentence 5 from the following paragraph:

[1] In 1856, eighteen-year-old chemistry student William Henry Perkin was attempting to synthesize quinine, a drug used to treat malaria, in his home laboratory. [2] Instead of the clear medicine he hoped for, Perkin produced a dark, sticky sludge in his beaker. [3] Cleaning the flask with alcohol, he noticed that the substance dissolved into a vibrant, purple liquid. [4] This accidental byproduct, which he named mauveine, became the world's first mass-produced synthetic organic dye. [5] Prior to Perkin’s discovery, purple clothing was a luxury reserved exclusively for royalty because the dye had to be painstakingly harvested from thousands of marine snails. [6] Recognizing the commercial potential of his creation, Perkin quickly patented the process and established a factory to manufacture the dye.

Should Sentence 5 be kept or deleted?

Show answer & explanation

Answer: Kept, because it provides historical context that explains why a mass-produced synthetic purple dye was so significant.

Answer

The sentence should be kept because it provides historical context that explains why a mass-produced synthetic purple dye was so significant.
The correct choice is to keep the sentence because it establishes crucial historical context. By explaining that natural purple dye was extremely rare and expensive—requiring harvesting from marine snails—the sentence explains why Perkin's affordable, mass-produced synthetic alternative was such a revolutionary development.

Step-by-Step Solution

1
Analyze the content of the proposed sentence for deletion.
Sentence 5 explains that before Perkin's discovery, purple clothing was an expensive luxury because the natural dye had to be painstakingly harvested from marine snails.
Understanding the specific details in the sentence helps determine if it adds value or distracts from the paragraph's main point.
2
Evaluate the relevance of the sentence to the paragraph's main idea.
The paragraph is about Perkin's accidental invention of mauveine, the first mass-produced synthetic dye. Sentence 5 explains the high cost and rarity of purple dye before this invention, which directly highlights the historical significance and impact of Perkin's cheap synthetic alternative.
A sentence should be kept if it provides essential transition, historical context, or supporting details for the main theme.
3
Select the correct decision and logical justification.
The sentence must be kept, and the correct justification is that it provides historical context showing the significance of the invention.
This matches the choice that suggests keeping the sentence to show why a mass-produced synthetic dye was so important.

Key Concept

Sentence Addition and Deletion Decisions
Estimated Time:1m 30s
Question 1436Question

When the Voyager 1 spacecraft reached the edge of our solar system, scientists were amazed to detect a low, hum-like vibration in the plasma data; it was audible to the ear, and they heard it.

Which choice best eliminates the redundancy in the underlined portion of the sentence?

Show answer & explanation

Answer: it was audible

Answer

it was audible
The option 'it was audible' is correct because it removes the repetitive phrases ('to the ear' and 'heard') while maintaining a grammatically complete independent clause after the semicolon.

Step-by-Step Solution

1
Identify the redundant elements in the underlined phrase.
The phrase contains 'audible,' 'to the ear,' and 'heard,' which are repetitive synonyms representing the same concept.
Redundancy must be eliminated to make the sentence concise and clear.
2
Evaluate the grammar of the concise options relative to the semicolon.
The clause following the semicolon must be independent. The option 'it was audible' is an independent clause, whereas 'which was audible' is a dependent clause that creates a fragment.
The correct answer must be grammatically correct as well as concise.

Key Concept

Eliminating Redundancy
Question 1437Question

During the construction of a fort near the Egyptian port city of Rashid in 1799, French soldiers uncovered a large slab of granodiorite that would later be known as the Rosetta Stone. The stone, which had writing carved into its surface that was written in three different scripts, proved to be the key to deciphering Egyptian hieroglyphs.

Which of the following options, when substituted for the underlined portion, creates the most concise and grammatically correct sentence?

Show answer & explanation

Answer: The stone, featuring text inscribed in three distinct scripts,

Answer

The stone, featuring text inscribed in three distinct scripts,
The correct option is the most concise and grammatically correct choice. It avoids the redundancy of using multiple words to describe the scripts and maintains a clear, direct active structure without grammatical errors.

Step-by-Step Solution

1
Analyze the underlined portion of the sentence for redundancy and wordiness.
The original phrase 'writing carved into its surface that was written' contains repetitive ideas since 'carved' and 'written' both refer to the inscriptions on the stone.
Identifying unnecessary repetition is the first step in resolving wordiness.
2
Evaluate each option to find the one that is grammatically correct and eliminates redundant language.
The phrase 'The stone, featuring text inscribed in three distinct scripts,' expresses the same idea in a clear, concise manner without grammatical errors or unnecessary repetition.
The correct choice must improve conciseness while remaining grammatically sound.

Key Concept

Eliminating Wordiness
Estimated Time:1m 0s
Question 1438Question

The architectural firm submitted several designs for the new city library. Ultimately, the city council selected the plan that was unique and unlike any other they had reviewed.

Which choice is the most concise and grammatically correct way to write the underlined portion of the sentence?

Show answer & explanation

Answer: selected the unique plan they had reviewed.

Answer

selected the unique plan they had reviewed.
The correct choice is the most concise option. Since the word 'unique' means 'unlike any other,' removing the repetitive phrase makes the sentence direct and clear without altering its meaning or introducing grammatical errors.

Step-by-Step Solution

1
Identify any redundant words or phrases in the underlined text.
The word 'unique' means 'unlike any other,' so including both 'unique' and 'unlike any other' is redundant.
Eliminating repetitive words is essential to meet the ACT English test requirement of conciseness.
2
Evaluate the remaining options for proper punctuation and sentence structure.
The option with the semicolon creates a sentence fragment because 'which' starts a dependent clause. The option with the comma creates a comma splice by linking two independent clauses without a coordinating conjunction.
The correct choice must be both concise and grammatically correct.

Key Concept

Eliminating redundancy to achieve conciseness and clarity in writing.
Estimated Time:45s
Question 1439Question

What is the value of the expression 243×(86)324 - 3 \times (8 - 6)^3?

Show answer & explanation

Answer: 00

Answer

The value of the expression is 00.
Applying the standard order of operations (PEMDAS), the parentheses are simplified first to get 22, then the exponent is evaluated to get 23=82^3 = 8. Next, the multiplication is performed to get 3×8=243 \times 8 = 24. Finally, subtraction gives 2424=024 - 24 = 0.

Step-by-Step Solution

1
Simplify the expression inside the parentheses.
86=28 - 6 = 2
According to the order of operations (PEMDAS), operations inside parentheses must be performed first.
2
Evaluate the exponent.
23=82^3 = 8
Exponents are evaluated after parentheses and before multiplication or division.
3
Perform the multiplication.
3×8=243 \times 8 = 24
Multiplication is performed after exponents and before subtraction.
4
Perform the subtraction.
2424=024 - 24 = 0
Subtraction is the final step in this expression.

Key Concept

Order of Operations
Estimated Time:45s
Question 1440Question

The following passage is about the history of climate science.

In 1856, the American scientist Eunice Foote conducted pioneering experiments on the warming effects of various gases. She discovered that a receiver filled with carbon dioxide heated up much more than one filled with common air. Ultimately, she concluded that carbon dioxide, a greenhouse gas that absorbs heat, could significantly alter the Earth's climate.

Which of the following options represents the correct punctuation for the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct option is the one that leaves the sentence unchanged, as it correctly uses a pair of commas to enclose the nonessential appositive phrase and does not introduce unnecessary punctuation within the restrictive clause.
The correct option correctly uses a pair of commas to set off the nonessential appositive phrase 'a greenhouse gas that absorbs heat.' Because this phrase is descriptive and can be removed without affecting the main sentence's meaning, it must be enclosed by commas. Additionally, the restrictive relative clause 'that absorbs heat' is correctly left unpunctuated because it is essential to the meaning of the noun 'gas'.

Step-by-Step Solution

1
Identify whether the underlined phrase is essential or nonessential to the sentence.
The phrase 'a greenhouse gas that absorbs heat' is a nonessential appositive that describes 'carbon dioxide'. Removing it does not change the core grammatical structure or meaning of the sentence.
Nonessential elements must be set off from the rest of the sentence with punctuation, typically commas.
2
Determine the appropriate placement of commas around the nonessential phrase.
A pair of commas is needed: one before the phrase (after 'dioxide') and one after the phrase (after 'heat').
Single dangling commas fail to enclose parenthetical information and create punctuation errors.
3
Analyze internal punctuation of the phrase for restrictive modifiers.
The clause 'that absorbs heat' is a restrictive relative clause modifying 'greenhouse gas' and must not be separated from it by a comma.
Restrictive clauses are essential to define their referent and should never be enclosed in commas.
4
Evaluate the choices to find the one that matches these rules.
The original sentence has a comma after 'dioxide' and after 'heat', and no comma before 'that'. Semicolons cannot set off nonessential appositives because they are not independent clauses.
This confirms that the original punctuation is correct and no change is needed.

Key Concept

Commas with Nonessential and Parenthetical Elements
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