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5556 questions

Question 701Question

During a freezing winter trip to New York City in 1903, Alabama native Mary Anderson noticed that streetcar drivers had to open their front windows or step outside to clear ice and sleet from their windshields, endangering themselves and their passengers. This hazardous situation inspired her to design a rubber squeegee blade operated by a hand lever inside the vehicle. Anderson was granted a patent for her window-cleaning device in 1903, yet manufacturing firms rejected her invention, believing it would distract drivers. Consequently, she never profited from her creation, and the patent eventually expired. [1]

The writer wants to add a sentence at the end of the passage (at point [1]) to conclude the discussion of Mary Anderson's invention. Which choice best accomplishes this goal by summarizing the main significance of her design while remaining consistent with the passage's tone and details?

Show answer & explanation

Answer: Although she never benefited financially, Anderson's design laid the foundation for the standard windshield wipers that would eventually become mandatory safety equipment on all motor vehicles.

Answer

The correct choice is the option that explains how Anderson's design laid the foundation for standard windshield wipers on all motor vehicles, despite her lack of financial benefit.
The correct choice successfully concludes the passage by highlighting the long-term impact and significance of Anderson's windshield wiper design while maintaining grammatical accuracy and consistency with the rest of the text.

Step-by-Step Solution

1
Analyze the paragraph's main theme and determine the purpose of the concluding sentence.
The passage describes Mary Anderson's invention of the windshield wiper, its initial rejection, and her lack of financial profit. The concluding sentence should tie these elements together and state the invention's ultimate significance.
Establishing the main point ensures the conclusion is relevant and comprehensive.
2
Evaluate the options for logical relevance and tone, ensuring no unsupported details are introduced.
The option mentioning the foundation of modern mandatory safety equipment summarizes the impact of her design. The options mentioning electric trolley power or automatic wipers introduce new, unsupported historical details.
A good conclusion summarizes existing ideas rather than introducing new subtopics.
3
Check the remaining options for grammatical correctness.
The option starting with 'Her design was simple' contains a comma splice. The option starting with 'Consequently, drivers had preferred' has an incorrect tense shift ('will fail'). Only the correct option is grammatically sound.
ACT English questions require the correct answer to be both rhetorically effective and grammatically correct.

Key Concept

A successful concluding sentence must summarize the passage's main points and highlight the significance of the topic without introducing new, unsupported information or grammatical errors.
Question 702Question

Identify the correct punctuation mark that completes the sentence boundary in the passage. What punctuation mark must be inserted into the blank to properly end the first sentence?

Fill in the blanks below

Although the telescope was originally designed to observe planets, the astronomer wondered if it could also be used to detect distant nebulae She adjusted the focal lens to begin her search.
Show answer & explanation

Answer

A period (.) is the correct punctuation mark because the first sentence contains an indirect question, which functions as a statement and must end with a period rather than a question mark.
The correct answer is a period. The first sentence is a statement containing an indirect question ('the astronomer wondered if it could also be used to detect distant nebulae'). Indirect questions function as declarative statements and must end with a period rather than a question mark.

Step-by-Step Solution

1
Analyze the structure of the first sentence to determine if it is a direct question or an indirect question.
The clause 'the astronomer wondered if it could also be used to detect distant nebulae' is phrased as a statement reporting what the astronomer wondered (an indirect question), not a direct inquiry.
Indirect questions do not ask a question directly and are grammatically structured as declarative statements.
2
Select the appropriate end-of-sentence punctuation mark based on the sentence type.
Since declarative statements and indirect questions require a period to end the sentence, a period must be used.
Using a question mark would be incorrect for an indirect question, and omitting punctuation or using a comma would create a run-on or comma splice.

Key Concept

Distinguishing between direct and indirect questions to apply correct end-of-sentence punctuation.
Estimated Time:45s
Question 703Question

Determine which single punctuation mark should replace the blank to correctly join the independent clauses in the sentence below.

Fill in the blanks below

Physarum polycephalum, a single-celled slime mold, does not possess a brain or nervous system nevertheless, it can navigate complex mazes to find the shortest path to a food source.
Show answer & explanation

Answer

A semicolon (;)
A semicolon is correct because it is the proper punctuation mark to link two independent clauses, especially when the second clause begins with a conjunctive adverb like 'nevertheless'. Because 'nevertheless' is in lowercase, a period cannot be used without capitalizing the next word, making the semicolon the only grammatically acceptable option.

Step-by-Step Solution

1
Analyze the grammatical structure of the clauses on both sides of the blank.
The clause before the blank ('Physarum polycephalum, a single-celled slime mold, does not possess a brain or nervous system') is an independent clause. The clause after the blank ('nevertheless, it can navigate complex mazes to find the shortest path to a food source') is also an independent clause starting with a conjunctive adverb.
Identifying the clause type helps determine the punctuation marks that are grammatically permissible to connect them.
2
Examine the capitalization of the word following the blank and assess potential punctuation choices.
The word 'nevertheless' starts with a lowercase letter, ruling out a period. A comma is also ruled out because joining two independent clauses with a comma alone results in a comma splice.
This eliminates punctuation marks that would violate sentence structure rules or require capitalization adjustments.
3
Select the correct punctuation mark that joins independent clauses separated by a conjunctive adverb.
A semicolon is the correct punctuation mark because it is designed to link two independent clauses, particularly when the second begins with a conjunctive adverb.
This ensures the sentence is grammatically correct and coherent without introducing structural errors.

Key Concept

Using a semicolon to link closely related independent clauses joined by a conjunctive adverb.
Estimated Time:1m 0s
Question 704Question

In 1967, astrophysicist Jocelyn Bell Burnell observed a series of regular radio pulses that she initially nicknamed 'Little Green Men'; however, further analysis revealed the source to be a rapidly spinning neutron star, it is a pulsar, which emits electromagnetic radiation along its magnetic poles.

Which of the following is the correct punctuation and phrasing for the underlined portion of the sentence?

Show answer & explanation

Answer: star: a pulsar, which emits

Answer

The correct option is the phrasing that reads 'star: a pulsar, which emits', as it uses a colon after a complete independent clause to introduce a clarifying definition.
The phrasing that uses a colon to introduce the appositive phrase defining the neutron star is correct. The clause before the colon is fully independent, and the information after it serves to clarify the specific type of star, which is the proper function of a colon.

Step-by-Step Solution

1
Determine if the clause before the underlined portion is independent.
The clause 'In 1967, astrophysicist Jocelyn Bell Burnell observed a series of regular radio pulses that she initially nicknamed 'Little Green Men'; however, further analysis revealed the source to be a rapidly spinning neutron star' is a complete thought that can stand alone as a sentence.
According to punctuation rules, a colon must be preceded by a complete independent clause.
2
Evaluate the grammatical relationship of the information following the punctuation.
The phrase 'a pulsar, which emits electromagnetic radiation along its magnetic poles' acts as an appositive that clarifies and defines the 'neutron star'.
A colon is used to introduce an explanation, definition, or list that elaborates on the preceding independent clause.
3
Analyze and eliminate incorrect distractors based on punctuation errors.
The original phrasing creates a comma splice; placing a colon after 'was' creates an incomplete clause before the colon; separating the relative clause with a period creates a sentence fragment.
Eliminating these errors leaves only the correct use of the colon to connect the independent clause to its clarifying appositive.

Key Concept

A colon must be preceded by an independent clause and is used to introduce an explanation, definition, illustration, or list that clarifies the preceding clause.
Estimated Time:45s
Question 705Question

During the Northern Renaissance, painters revolutionized the medium of panel painting by experimenting with new binders. Artists who adopted oil-based pigments, which dried much slower than traditional egg tempera achieved unprecedented levels of detail and luminosity. This technical shift allowed for the realistic depiction of light and texture that defined the era.

Which of the following options correctly punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: who adopted oil-based pigments, which dried much slower than traditional egg tempera,

Answer

The correct choice is the option that correctly leaves the essential clause 'who adopted oil-based pigments' integrated without commas and encloses the nonessential clause 'which dried much slower than traditional egg tempera' with a pair of commas.
The clause 'who adopted oil-based pigments' is restrictive (essential) because it defines which specific artists achieved unprecedented detail and luminosity; therefore, it should not be set off by commas. In contrast, the clause 'which dried much slower than traditional egg tempera' is nonrestrictive (nonessential) because it adds extra descriptive information about the pigments, so it must be enclosed by a pair of commas. The correct option correctly leaves 'who adopted oil-based pigments' integrated into the main sentence while enclosing 'which dried much slower than traditional egg tempera' with commas on both sides.

Step-by-Step Solution

1
Analyze the structure of the sentence containing the underlined portion and identify the relative clauses.
The sentence contains two relative clauses modifying nouns: 'who adopted oil-based pigments' modifying 'Artists', and 'which dried much slower than traditional egg tempera' modifying 'pigments'.
Identifying the relative clauses allows us to determine their syntactic role and necessary punctuation.
2
Determine whether the first relative clause is essential (restrictive) or nonessential (nonrestrictive) to the meaning of the sentence.
The clause 'who adopted oil-based pigments' is essential because it specifies which particular group of artists achieved the unprecedented levels of detail and luminosity. Therefore, it should not be set off by commas.
Essential clauses define the nouns they modify and must not be separated from them by punctuation.
3
Determine whether the second relative clause is essential or nonessential.
The clause 'which dried much slower than traditional egg tempera' is nonessential because it merely adds extra descriptive information about oil-based pigments and does not change the core identity of the pigments. Thus, it must be enclosed within a parenthetical pair of commas.
Nonessential elements must be set off by commas on both sides to show they can be removed without altering the primary meaning of the sentence.
4
Select the option that reflects these punctuation rules.
The option that leaves the first clause integrated without commas and places a closing comma after 'tempera' is correct.
This configuration correctly balances the restrictive and nonrestrictive elements of the sentence.

Key Concept

Distinguishing between essential (restrictive) and nonessential (nonrestrictive) clauses, and applying proper comma punctuation to set off nonessential parenthetical elements.
Estimated Time:45s
Question 706Question

Although the paleontologist had expected to find only common bivalve fossils in the limestone stratum, she instead uncovered a well-preserved, complete, skeleton of an ancient marine reptile, which she spent the next week carefully excavating.

Which of the following choices best punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: well-preserved, complete skeleton of an ancient marine reptile, which she

Answer

The correct option is the one that separates the coordinate adjectives with a comma, has no comma before the noun, and uses a comma to introduce the dependent relative clause.
The correct option properly punctuates the sentence by placing a comma between the coordinate adjectives 'well-preserved' and 'complete' to show they independently modify the noun 'skeleton'. It correctly removes the erroneous comma before 'skeleton' and uses a comma to set off the non-essential relative clause starting with 'which'.

Step-by-Step Solution

1
Analyze the coordinate adjectives modifying the noun 'skeleton'.
The adjectives 'well-preserved' and 'complete' are coordinate because they can be reversed ('complete, well-preserved skeleton') and can be joined by 'and' ('well-preserved and complete skeleton'). Therefore, they must be separated by a comma, but no comma should be placed between the final adjective 'complete' and the noun 'skeleton'.
To ensure proper punctuation rules for coordinate adjectives are applied.
2
Determine the relationship between the main clause and the relative clause.
The clause beginning with 'which' is a non-essential relative clause that adds descriptive info about the skeleton. It must be separated from the main clause by a comma, not a semicolon or no punctuation.
To determine the correct punctuation at the clause boundary.
3
Evaluate the choices to find the one that meets all grammatical requirements.
The choice containing 'well-preserved, complete skeleton... which she' is the only option that correctly applies both coordinate adjective punctuation and non-essential clause punctuation without introducing comma splices or fragments.
To select the grammatically correct option.

Key Concept

Commas with Coordinate Adjectives and Non-essential Relative Clauses
Question 707Question

To prepare the spacecraft for its historic voyage, engineers conducted a series of tests on the complex, advanced navigation systems, and they verified that every sensor was calibrated to withstand extreme solar radiation.

Which of the following options is the best choice for the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct choice is the one that retains the original punctuation, separating the coordinate adjectives with a comma and using a comma and coordinating conjunction to link the two independent clauses.
The correct choice keeps the comma between 'complex' and 'advanced' because they are coordinate adjectives. It does not place a comma before 'navigation' because 'navigation' is a cumulative adjective. Finally, it uses a comma before the coordinating conjunction 'and' because 'they verified...' begins a new independent clause.

Step-by-Step Solution

1
Identify whether the adjectives 'complex' and 'advanced' are coordinate or cumulative.
They are coordinate adjectives because they can be reversed ('advanced, complex') and joined with 'and' ('complex and advanced') while retaining the same meaning.
Coordinate adjectives must be separated by a comma.
2
Determine if a comma is needed between 'advanced' and 'navigation'.
No comma is needed because 'navigation' is a cumulative adjective modifying 'systems' rather than a coordinate adjective.
Cumulative adjectives should not be separated by commas.
3
Evaluate the clause boundary after 'systems'.
'Engineers conducted a series of tests...' and 'they verified...' are two independent clauses.
Two independent clauses must be joined by a comma and a coordinating conjunction (such as 'and') or by a semicolon alone.

Key Concept

Commas with coordinate adjectives and independent clauses
Estimated Time:1m 0s
Question 708Question

Deep within the dense canopy of the Guatemalan jungle, archaeologists have long struggled to locate ancient Maya structures. Recently, however, light detection and ranging (LiDAR) technology has revolutionized the field, researchers fire millions of laser pulses from an airplane to map the ground beneath the foliage. This method has revealed thousands of previously hidden ruins, including pyramids, highways, and defensive walls.

Which of the following choices best punctuates the underlined portion of the passage?

Show answer & explanation

Answer: field; researchers fire

Answer

field; researchers fire
The semicolon is used to separate two independent clauses that are closely related. The clause before the punctuation ('Recently, however, light detection and ranging (LiDAR) technology has revolutionized the field') and the clause after ('researchers fire millions of laser pulses...') are both independent because they each contain a subject and a verb and express a complete thought. The option 'field; researchers fire' correctly joins these two independent clauses without introducing grammatical errors.

Step-by-Step Solution

1
Analyze the clause before the underline.
The clause 'Recently, however, light detection and ranging (LiDAR) technology has revolutionized the field' is independent because it contains a subject (technology) and a verb (has revolutionized) and expresses a complete thought.
Identifying clause types is necessary to determine proper punctuation at sentence boundaries.
2
Analyze the clause after the underline.
The clause 'researchers fire millions of laser pulses from an airplane to map the ground beneath the foliage' is also independent because it has a subject (researchers) and a verb (fire) and can stand alone as a sentence.
This determines whether the punctuation must separate two independent clauses.
3
Evaluate the punctuation and grammatical structure of the options.
Joining two independent clauses requires a semicolon, a period, or a comma with a coordinating conjunction. The option 'field; researchers fire' correctly uses a semicolon and maintains the conjugated verb 'fire'.
This eliminates options that create comma splices, fragments, or incorrect semicolon usage.

Key Concept

End-of-Sentence Punctuation
Estimated Time:1m 0s
Question 709Question

[1] In 79 CE, the eruption of Mount Vesuvius buried the villa of Herculaneum, carbonizing hundreds of papyrus scrolls and rendering them too fragile to unroll. [2] For centuries, any attempt to physically open these scrolls resulted in their immediate destruction. [3] Recently, however, researchers have utilized high-resolution X-ray phase-contrast tomography to virtually unwrap the scrolls, revealing the faint density differences between the carbon-based ink and the carbonized papyrus. [4] Advanced machine learning algorithms are then trained to detect these subtle texture variations, translating them into legible Greek characters. [5] Computer scientists have also used similar machine learning models to identify fraudulent paintings in major art museums. [6] As this digital technology continues to advance, scholars hope to recover lost philosophical treatises that have remained unreadable for nearly two millennia.

The author is considering deleting Sentence 5 from the paragraph. Should the sentence be kept or deleted?

Show answer & explanation

Answer: Deleted, because it introduces a separate application of machine learning that digresses from the paragraph's focus on deciphering the scrolls.

Answer

Deleted, because it introduces a separate application of machine learning that digresses from the paragraph's focus on deciphering the scrolls.
The correct option is the one stating the sentence should be deleted because it digresses from the paragraph's focus on deciphering the scrolls. The paragraph centers on the technological process of virtually unwrapping and reading the carbonized scrolls of Herculaneum. Discussing fraudulent paintings in art museums shifts the topic away from this focus and disrupts the flow of the passage.

Step-by-Step Solution

1
Identify the primary topic and focus of the paragraph.
The paragraph details the specific scientific and computational methods used to read the carbonized Herculaneum scrolls.
Determining paragraph unity requires establishing its specific scope.
2
Evaluate the relevance of Sentence 5 to that primary topic.
Sentence 5 discusses using machine learning to detect fraudulent paintings in art museums.
Analyzing the sentence in context reveals whether it contributes to the development of the main topic.
3
Decide whether the sentence should be kept or deleted.
The sentence should be deleted because identifying fake paintings is a different subject that interrupts the development of the scroll-deciphering narrative.
Sentences that digress from the established focus of a paragraph must be removed.
4
Evaluate the options to find the correct decision and logical explanation.
The option recommending deletion because the sentence digresses from the focus on the scrolls is the only one with both a correct decision and an accurate rhetorical reason.
An ACT English add/delete option is only correct if both the yes/no decision and the rationale are sound.

Key Concept

Evaluating relevance for adding or deleting content based on the paragraph's specific focus.
Question 710Question

The following is an excerpt from an essay about early Earth's climate.

[1]
In 19721972, astronomers Carl Sagan and George Mullen pointed out a puzzling contradiction that threatened our understanding of Earth's early history. According to standard astrophysical models, our sun was about 3030 percent dimmer during the Archean Eon, four billion years ago, than it is today. With so little solar energy reaching the planet, Earth should have been a frozen wasteland, completely locked in ice. Yet, geological evidence from that same period—such as water-worn pebbles and ancient sedimentary rocks—reveals that liquid water flowed abundantly across the surface, and primitive life was already thriving.

[2]
To resolve this paradox, researchers have proposed various atmospheric models. One prominent theory suggests that a dense greenhouse gas envelope, consisting of carbon dioxide and perhaps ammonia or methane, acted as a heavy blanket to trap what little heat the faint sun provided. Others argue that Earth's lower albedo, or reflectivity, allowed the surface to absorb more solar radiation than it does today. Understanding how Earth maintained its liquid oceans during this period is not just a historical curiosity; it also helps astronomers define the boundaries of habitable zones around distant stars.

Which choice provides the most effective transition from the first paragraph to the second paragraph and introduces the main topic of the second paragraph?

Show answer & explanation

Answer: To resolve this paradox, researchers have proposed various atmospheric models.

Answer

The phrasing that states 'To resolve this paradox, researchers have proposed various atmospheric models.' is correct because it provides a grammatically sound transition that links the paradox of the first paragraph to the scientific models described in the second paragraph.
The correct answer, which mentions proposing various atmospheric models to resolve the paradox, is grammatically correct and establishes a logical link between the paradox of the faint young sun (described in the first paragraph) and the specific atmospheric hypotheses (discussed in the second paragraph).

Step-by-Step Solution

1
Analyze the relationship between the first and second paragraphs to determine the transition needed.
The first paragraph describes the 'faint young sun paradox' (a dim early sun but liquid water on Earth), while the second paragraph discusses specific theories (greenhouse gases and albedo) to explain it.
An effective transition must connect this contradiction (the paradox) to the explanations (the models).
2
Evaluate the grammar of the transition options.
Identify that several options introduce grammatical errors such as sentence fragments, comma splices, or incorrect semicolon usage.
The correct option must not only be contextually appropriate but also grammatically correct.
3
Identify the correct choice based on grammar and context.
The correct choice connects the paragraphs logically without introducing any punctuation or structural errors.
This ensures the passage maintains flow, clarity, and grammatical precision.

Key Concept

Establishing transitions and paragraph-level topic sentences that logically connect and introduce paragraph topics.
Estimated Time:1m 15s
Question 711Question

Many local community gardens have started implementing rainwater harvesting systems to conserve water. These systems collect rain that runs off roofs and store it in large barrels. Which can then be used to water the plants during dry spells. This practice helps reduce municipal water usage significantly.

Which of the following options best corrects the underlined portion of the passage?

Show answer & explanation

Answer: barrels, which

Answer

barrels, which
The correct option correctly uses a comma to subordinate the relative clause beginning with 'which' to the main clause. This avoids a fragment and ensures a grammatically sound sentence.

Step-by-Step Solution

1
Analyze the underlined portion and the clause that follows it to determine if it is independent or dependent.
The clause 'Which can then be used...' begins with a relative pronoun and lacks a complete thought, making it dependent.
Correct end-of-sentence punctuation depends on whether the clauses on both sides can stand alone as complete sentences.
2
Evaluate the current punctuation and options to see which choice avoids creating a sentence fragment or a comma splice.
Using a period or a semicolon creates a fragment because the second clause is dependent. Replacing 'which' with 'this' creates a comma splice.
Dependent relative clauses must be joined to their independent clause using a comma rather than terminal punctuation or coordination that creates a comma splice.
3
Select the option that joins the clauses correctly.
The phrase 'barrels, which' correctly subordinates the relative clause and connects it to the main clause.
This establishes proper sentence boundaries and makes the passage grammatically correct.

Key Concept

Identifying sentence boundaries and ensuring that dependent relative clauses are connected to independent clauses without creating sentence fragments.
Estimated Time:45s
Question 712Question

During a trolley ride in a freezing New York City winter, Mary Anderson observed the driver repeatedly opening the front window pane to brush away falling sleet, exposing passengers to the biting cold. Determined to find a solution, she sketched a device featuring a hand-operated lever inside the vehicle linked to a rubber blade on the outside. Although she secured a patent for her mechanical sweeper in 1903, manufacturing companies rejected her design, viewing it as a dangerous distraction for drivers.

The writer wants to add a sentence at the end of the paragraph that contrasts the initial commercial failure of Mary Anderson's invention with its eventual universal adoption. Which choice best accomplishes this goal?

Show answer & explanation

Answer: By the time her patent expired in 1920, windshield wipers had become standard equipment on most consumer vehicles, including the Ford Model T.

Answer

By the time her patent expired in 1920, windshield wipers had become standard equipment on most consumer vehicles, including the Ford Model T.
The correct option is the one stating that by the time her patent expired in 1920, windshield wipers had become standard equipment. This choice successfully contrasts the initial rejection of Mary Anderson's design in 1903 with its eventual integration as standard equipment on most consumer vehicles.

Step-by-Step Solution

1
Analyze the prompt's rhetorical goal.
The prompt requires a sentence that contrasts the initial rejection and commercial failure of Mary Anderson's invention in 1903 with its eventual widespread and standard use.
This establishes the criteria for evaluating the choices.
2
Evaluate the choices against the rhetorical goal.
The choice discussing the 1920 patent expiration and standard equipment on vehicles like the Ford Model T matches the goal. The options discussing Robert Kearns or the National Inventors Hall of Fame fail to address this specific contrast.
Eliminating choices that do not meet the rhetorical goal narrows down the candidates.
3
Check the remaining candidates for grammatical correctness.
The choice detailing the 1920 patent expiration is grammatically correct. The choice starting with 'She never profited from the invention herself' is incorrect because it contains a comma splice.
ACT English requires the correct option to be grammatically flawless.

Key Concept

Meeting Specific Rhetorical Goals
Question 713Question

While the school's teachers prepared for the upcoming semester, the administrators' chief goal was it's successful launch.

Which of the following is the correct spelling and punctuation of the underlined portion of the sentence?

Show answer & explanation

Answer: administrators' chief goal was its

Answer

administrators' chief goal was its
The correct option correctly uses the plural possessive "administrators'" to show that the goal belongs to the collective group of administrators, and the possessive pronoun "its" to modify the noun phrase "successful launch."

Step-by-Step Solution

1
Determine if the noun "administrators" should be singular or plural, and how to make it possessive.
The context refers to the school's collective staff in the plural (indicated by "teachers"), so "administrators" should be plural. To show possession of "chief goal," the plural possessive form "administrators'" must be used.
Plural nouns ending in -s show possession by placing an apostrophe after the final -s.
2
Determine whether to use a contraction or a possessive pronoun before "successful launch."
The sentence requires the possessive pronoun "its" to show that the launch belongs to the semester. Using "it's" (it is) would create a grammatical error.
Possessive pronouns (such as its, their, and whose) do not use apostrophes, while contractions (such as it's, they're, and who's) do.
3
Combine the correct forms to identify the correct option.
The correct phrase is "administrators' chief goal was its".
This option correctly applies the rules of plural possession and possessive pronouns.

Key Concept

Apostrophes for Plural Possessives and Possessive Pronouns vs. Contractions
Estimated Time:1m 0s
Question 714Question

The document <u>that contains the signature, which was drafted in 17761776,</u> is preserved in the national archives. It is displayed under protective glass to prevent fading.

Which choice is the correct punctuation for the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct option is 'NO CHANGE', which leaves the restrictive clause without commas and encloses the nonessential parenthetical clause in a pair of commas.
The correct option maintains the sentence's structure by keeping the restrictive clause 'that contains the signature' without commas, while properly enclosing the nonessential parenthetical clause 'which was drafted in 17761776' with a pair of commas.

Step-by-Step Solution

1
Identify the restrictive clause 'that contains the signature' and the nonessential clause 'which was drafted in 17761776'.
The clause 'that contains the signature' specifies which document and is restrictive. The clause 'which was drafted in 17761776' adds extra information and is nonessential.
This determines which parts of the sentence require commas and which do not.
2
Apply the punctuation rules for restrictive and nonessential clauses.
Keep the restrictive clause without commas and enclose the nonessential clause in a pair of commas.
A pair of commas is necessary to correctly set off nonessential information from the main sentence structure.

Key Concept

Distinguishing between restrictive and nonessential clauses to apply commas correctly.
Question 715Question

During his expedition to the Antarctic, the explorer packed only the absolute essentials: a thermal tent, a sleeping bag, and a portable stove.

Which of the following options correctly punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: essentials: a thermal

Answer

essentials: a thermal
The correct option uses a colon to separate a complete sentence (independent clause) from a list that describes the essentials. This matches the standard rules of colon usage.

Step-by-Step Solution

1
Identify the clause preceding the punctuation mark.
The preceding clause is 'During his expedition to the Antarctic, the explorer packed only the absolute essentials'.
This clause contains a subject and a verb and expresses a complete thought, meaning it is an independent clause.
2
Determine the grammatical role of the text following the punctuation mark.
The text 'a thermal tent, a sleeping bag, and a portable stove' is a list of items describing the essentials.
Since the preceding clause is independent and is followed by a list, a colon is the correct punctuation to introduce it.

Key Concept

A colon must be preceded by an independent clause (a complete sentence) when used to introduce a list, explanation, or elaboration.
Estimated Time:45s
Question 716Question

For decades after the Tudor warship *Mary Rose* was raised from the Solent in 1982, conservators kept the wooden hull constantly saturated with a chilled freshwater mist to prevent it from drying out and collapsing. Eventually, they began actively replacing the water in the wood cells with polyethylene glycol (PEG), a water-soluble polymer.

Given that all the choices are true, which choice most clearly highlights the transition from temporary preservation methods to a permanent, structural stabilization technique while emphasizing the scientific complexity of the process?

Show answer & explanation

Answer: By slowly increasing the concentration of the polymer over decades, conservators successfully infused the timber's cell walls to structurally reinforce the decaying wood, allowing the misting sprays to finally be turned off.

Answer

The correct option is the one stating that by slowly increasing the concentration of the polymer over decades, conservators infused the cell walls to structurally reinforce the decaying wood, allowing the misting sprays to be turned off.
The correct choice successfully establishes the transition from temporary preservation (misting sprays) to a permanent structural stabilization technique (infusing the cell walls to structurally reinforce the decaying wood) and highlights the scientific complexity (slowly increasing the polymer's concentration over decades).

Step-by-Step Solution

1
Analyze the prompt to identify the specific rhetorical goals required: transitioning from temporary preservation to permanent structural stabilization, and emphasizing scientific complexity.
The correct choice must show temporary preservation methods ending, permanent structural reinforcement beginning, and mention complex scientific details like concentration changes or cellular infusion.
Understanding the precise criteria is essential to evaluate the choices effectively.
2
Evaluate each option for grammatical correctness.
The option starting with 'Conservators slowly increased the polymer's concentration' contains a comma splice and is eliminated.
ACT English choices must be grammatically correct first.
3
Evaluate the remaining options against the rhetorical goals.
The option about the museum facility ignores the preservation methods. The option comparing the chemical treatment to water sprays is too simple and lacks details of scientific complexity. The option describing the slow increase of polymer concentration and infusion of cell walls meets all criteria.
Only one option fulfills all elements of the rhetorical prompt.

Key Concept

Meeting Specific Rhetorical Goals
Question 717Question

Before beginning the pottery class, the instructor listed the required materials, including: clay, a sponge, and a wire tool.

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

Show answer & explanation

Answer: materials: clay

Answer

The option that replaces the underlined portion with 'materials: clay' is correct, as it properly introduces a list after an independent clause.
The correct choice replaces the error in the original sentence by placing a colon directly after the word 'materials'. This is correct because the preceding clause 'Before beginning the pottery class, the instructor listed the required materials' is independent, and the colon properly introduces the subsequent list.

Step-by-Step Solution

1
Analyze the original sentence structure to identify any errors.
The original text features a colon after 'including', which is incorrect because a colon should not separate a preposition or participle from its objects.
This shows that the original phrasing needs correction.
2
Determine if the clause preceding the list is independent in the alternative phrasings.
The clause 'Before beginning the pottery class, the instructor listed the required materials' can stand alone as a complete sentence.
A colon must always be preceded by a complete independent clause.
3
Select the correct punctuation to connect the independent clause and the list.
A colon placed after 'materials' is the correct punctuation to introduce the list of items ('clay, a sponge, and a wire tool').
This rules out semicolons (which require two independent clauses) and commas (which are insufficient to introduce a list in this context).

Key Concept

Colons must be preceded by an independent clause and can be used to introduce lists, explanations, or quotes.
Question 718Question

During the Islamic Golden Age, scholars made significant strides in understanding the behavior of light. The physicist Ibn al-Haytham , who is often considered the father of modern optics, revolutionized scientific methodology through his rigorous experiments. In his influential work *Book of Optics*, he demonstrated that light travels in straight lines and enters the eye to produce vision.

Which choice best punctuates the underlined portion of the sentence?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct answer is the option that keeps the original punctuation (NO CHANGE). The clause 'who is often considered the father of modern optics' is a nonessential relative clause because the subject 'Ibn al-Haytham' is a proper noun and already specifically identified. Therefore, the clause must be set off with a pair of commas. Keeping the comma before 'who' and after 'optics' correctly punctuates the sentence.
The clause starting with 'who' is nonessential because the subject 'Ibn al-Haytham' is a proper noun and is already fully identified. Therefore, this parenthetical information must be enclosed by a pair of commas. The original text correctly places a comma before 'who' and a comma after 'optics' before the main verb 'revolutionized'.

Step-by-Step Solution

1
Identify the grammatical role of the underlined clause.
The clause starting with 'who' is a relative clause modifying the proper noun 'Ibn al-Haytham'.
Determining whether a clause is essential (restrictive) or nonessential (nonrestrictive) dictates how it must be punctuated.
2
Determine whether the clause is essential or nonessential.
Because the subject 'Ibn al-Haytham' is already a specifically named individual, the relative clause is nonessential information that could be removed without changing the core meaning of the sentence.
Nonessential elements must be set off from the rest of the sentence by a matching pair of punctuation marks, such as commas.
3
Evaluate the choices to find the correct punctuation structure.
A pair of commas must enclose the clause. The comma before 'who' and the comma after 'optics' correctly isolate the nonessential element.
Omitting one comma, using a semicolon, or using a restrictive pronoun with commas would violate standard punctuation and usage rules.

Key Concept

Commas with Nonessential and Parenthetical Elements
Question 719Question

In his landmark studies of memory, psychologist Hermann Ebbinghaus identified a critical phenomenon: the forgetting curve demonstrates that information is lost rapidly after learning unless it is actively reviewed.

Which of the following is the most appropriate edit to the underlined portion?

Show answer & explanation

Answer: NO CHANGE

Answer

The correct option is the one that leaves the sentence unchanged, using a colon after 'phenomenon' and before 'the forgetting'.
The original punctuation is correct. The colon is preceded by a complete, independent clause ('In his landmark studies of memory, psychologist Hermann Ebbinghaus identified a critical phenomenon') and is followed by an independent clause that explains the phenomenon. This aligns with ACT standards for colon usage.

Step-by-Step Solution

1
Analyze the clause preceding the punctuation mark.
The clause 'In his landmark studies of memory, psychologist Hermann Ebbinghaus identified a critical phenomenon' is an independent clause because it contains a subject and a verb and can stand alone as a complete sentence.
According to grammar rules, a colon must always be preceded by an independent clause.
2
Analyze the clause or phrase following the punctuation mark.
The clause 'the forgetting curve demonstrates that information is lost rapidly after learning unless it is actively reviewed' is also an independent clause that directly explains and amplifies the 'phenomenon' mentioned in the first clause.
A colon is appropriate for joining two independent clauses when the second clause explains or illustrates the first.
3
Evaluate the incorrect options to identify errors.
The options using 'which is:', 'defined by:', and 'because:' all place the colon immediately after a verb, a preposition, or a subordinating conjunction, which violates the rule that the colon must follow a complete, independent clause.
Placing a colon after a verb, preposition, or subordinating conjunction results in an incomplete sentence preceding the colon.

Key Concept

Colons must be preceded by an independent clause and should not be placed directly after verbs, prepositions, or subordinating conjunctions.
Question 720Question

Reading Between the Lines

[1]
In 19481948, Norman Joseph Woodland, a graduate student at Drexel Institute of Technology, set out to solve a persistent problem for supermarkets: how to automate the tedious process of inventory checking and checkout. Standard methods relied on manual entry, which was slow and prone to human error. Woodland, along with his classmate Bernard Silver, began brainstorming solutions, but their initial ideas, which involved ultraviolet ink, proved impractical and expensive.

[2]
The breakthrough came in an unexpected setting. While visiting his grandfather in Miami, Woodland sat on the beach, pondering how to encode information visually. He idly ran his fingers through the sand, pulling four fingers toward him to draw parallel lines. Looking down at the patterns left behind, he had a sudden realization. He could adapt the concept of Morse code—a system he had learned in the Boy Scouts—by extending the dots and dashes vertically to create thin lines and thick lines. By reading these lines with a light source, a machine could instantly decode the information.

[3]
Woodland and Silver patented their "Classifying Apparatus and Method" in 19521952, but the technology required to read the code—including lasers and computers small enough to fit in a store—did not yet exist. It would take more than two decades, and the development of the microchip and helium-neon lasers, before the barcode would make its commercial debut. On June 2626, 19741974, a pack of chewing gum was scanned at a supermarket in Troy, Ohio, marking the birth of a technology that would revolutionize global commerce and logistics.

Suppose the writer's goal had been to write an essay that details the collaborative efforts and equal division of technical labor between Norman Joseph Woodland and Bernard Silver in the commercialization of the barcode. Would this essay successfully fulfill that goal?

Show answer & explanation

Answer: No, because the essay focuses primarily on Woodland’s individual breakthrough and subsequent technological developments rather than detailing a collaborative division of labor in commercializing the invention.

Answer

No, because the essay focuses primarily on Woodland’s individual breakthrough and subsequent technological developments rather than detailing a collaborative division of labor in commercializing the invention.
The essay does not fulfill the stated goal. While it mentions Bernard Silver as Woodland's classmate and co-patent holder, it does not describe their collaborative efforts or any division of labor between them. Instead, it describes Woodland's solitary inspiration on the beach and attributes the final commercialization to broader technological advancements like microchips and lasers. Therefore, the option explaining that the essay focuses on Woodland's individual breakthrough and subsequent developments is correct.

Step-by-Step Solution

1
Analyze the writer's goal stated in the prompt.
The goal is to write an essay that details the collaborative efforts and equal division of technical labor between Woodland and Silver in commercializing the barcode.
Understanding the precise requirements of the goal is essential to evaluating the essay's success.
2
Evaluate the passage content against the goal.
The passage mentions Silver briefly in the first and third paragraphs but focuses almost entirely on Woodland's solo realization on the beach and the independent development of lasers and microchips by others.
Comparing the text's actual focus to the hypothetical goal determines if the goal is met.
3
Select the correct direction (Yes or No) and evaluate the reasoning in the options.
The essay does not meet the goal, eliminating the 'Yes' options. Among the 'No' options, the one claiming they abandoned the project is factually incorrect. The correct option is the one explaining that the essay focuses on Woodland's individual breakthrough and subsequent technology.
This isolates the correct option by matching both the correct direction and factual support from the text.

Key Concept

Evaluating Whole-Essay Goals and Purpose
Estimated Time:1m 30s
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