Use Precise Language and Vocabulary
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5th Grade Writing › Use Precise Language and Vocabulary
Diego wrote informational writing about shapes. Which revision used precise geometry vocabulary instead of vague words?
“A triangle has three sides and three corners,” because “corners” is the most precise term.
“A circle is round with no corners,” because “round” is a technical math definition.
“A square is really even,” because “even” clearly explains angles and side lengths.
“A triangle is a polygon with three sides and three vertices,” because it uses correct math terms.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'corners' is everyday language; 'vertices' is the precise mathematical term for the points where sides of a polygon meet. In this scenario, Diego writes about geometric shapes. The most precise revision uses 'polygon' (technical term for closed figures with straight sides) and 'vertices' (mathematical term for corners). These geometry terms make the explanation more mathematically precise than using everyday words like 'corners' or vague descriptions like 'really even.' Choice C is correct because it accurately identifies the revision using precise geometry vocabulary. For example, it correctly shows that 'polygon' and 'vertices' are the proper mathematical terms, replacing everyday language like 'corners' with technical terminology that mathematicians use. This demonstrates understanding that domain-specific vocabulary is more accurate than general language. Choice B represents the error of thinking everyday language is precise enough. Students who choose this may not recognize that 'corners' is informal compared to 'vertices.' This happens because students might not know the technical mathematical terms, or they may think that if a word communicates the idea clearly in everyday language, it's precise enough for academic writing, not understanding that each field has specific technical vocabulary. To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('big clouds,' 'goes up,' 'things'). Precise: specific, exact terms ('cumulonimbus clouds,' 'evaporates,' 'primary consumers'). Teach domain-specific vocabulary by subject: Science (organism, cell, evaporation, condensation, photosynthesis, ecosystem, producer, consumer, decomposer), Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation), Social Studies (taxation, representation, Parliament, constitution, amendment, sovereign, delegate), Arts (tempo, dynamics, perspective, composition, harmony, palette, medium). Practice revision: Give vague informational paragraph, have students identify vague words ('big,' 'things,' 'goes,' 'makes,' 'stuff,' 'gets'), then replace with precise, domain-specific terms.
In Chen’s water-cycle informational writing, which phrase was vague language, not precise science vocabulary?
“condenses into tiny droplets,” because it named the process that forms clouds.
“goes up into the air,” because it did not name the process or the state change.
“percolates into soil as groundwater,” because it explained where water moved underground.
“precipitation—rain, snow, sleet, or hail,” because it listed exact types of water falling.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'water goes up into the air' is vague because it doesn't name the process or explain the state change; 'water evaporates' is precise because it names the specific process of liquid changing to vapor. In this scenario, Chen writes about the water cycle. The phrase 'goes up into the air' is vague language because it uses everyday words that don't explain the scientific process. In contrast, phrases like 'precipitation,' 'percolates,' 'groundwater,' and 'condenses' use precise scientific vocabulary that names specific processes and states. Choice C is correct because it accurately identifies the vague language. For example, 'goes up into the air' fails to name the process (evaporation) or the state change (liquid to vapor), using general movement description instead of scientific terminology. This demonstrates understanding that vague language lacks the technical precision needed for scientific explanation. Choice A represents the error of not recognizing precise language. Students who choose this may not understand that 'precipitation' is a technical term. This happens because students might think any phrase with details is vague, or not recognize domain-specific vocabulary when they see it, especially when terms like 'precipitation' might seem familiar from weather reports but are actually precise scientific vocabulary. To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('big clouds,' 'goes up,' 'things'). Precise: specific, exact terms ('cumulonimbus clouds,' 'evaporates,' 'primary consumers'). Teach domain-specific vocabulary by subject: Science (organism, cell, evaporation, condensation, photosynthesis, ecosystem, producer, consumer, decomposer), Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation), Social Studies (taxation, representation, Parliament, constitution, amendment, sovereign, delegate), Arts (tempo, dynamics, perspective, composition, harmony, palette, medium). Practice revision: Give vague informational paragraph, have students identify vague words ('big,' 'things,' 'goes,' 'makes,' 'stuff,' 'gets'), then replace with precise, domain-specific terms.
Jamal explained painting methods in informational writing. How did precise language help him explain his process?
It added domain-specific terms like impasto and glazing, which told exactly how he applied paint.
It replaced art terms with vague words like “stuff,” so the steps sounded simpler.
It made the writing mysterious by hiding details, so readers had to guess what tools he used.
It used only general academic words like “utilize,” without naming any art techniques or tools.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'put on thick paint' is vague; 'applied paint using impasto technique' is precise because 'impasto' is the art term for thick paint application that creates texture. In this scenario, Jamal explains painting methods. The precise language helped by adding domain-specific terms like 'impasto' (thick paint application) and 'glazing' (thin transparent paint layers). These art terms tell exactly how paint was applied, making the process explanation more technically accurate than vague descriptions. Choice B is correct because it accurately explains how precision improves the explanation. For example, it correctly identifies that adding 'impasto' and 'glazing' tells exactly how paint was applied, replacing vague descriptions with technical art terminology that allows readers to understand the specific techniques used. This demonstrates understanding that domain-specific vocabulary is more accurate than general language. Choice A represents the error of thinking vague language creates mystery. Students who choose this may misunderstand the purpose of informational writing. This happens because students might confuse creative writing goals with informational writing goals (thinking mystery is good when informational writing should be clear and precise), or not recognize that precision helps readers understand processes better. To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('big clouds,' 'goes up,' 'things'). Precise: specific, exact terms ('cumulonimbus clouds,' 'evaporates,' 'primary consumers'). Teach domain-specific vocabulary by subject: Science (organism, cell, evaporation, condensation, photosynthesis, ecosystem, producer, consumer, decomposer), Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation), Social Studies (taxation, representation, Parliament, constitution, amendment, sovereign, delegate), Arts (tempo, dynamics, perspective, composition, harmony, palette, medium). Practice revision: Give vague informational paragraph, have students identify vague words ('big,' 'things,' 'goes,' 'makes,' 'stuff,' 'gets'), then replace with precise, domain-specific terms.
Chen wrote informational writing about the water cycle. Draft: “Water goes up and makes clouds.” Revision: “Water evaporates into water vapor and condenses into clouds.” Which words are precise, domain-specific vocabulary?
“goes up,” “makes,” and “comes back down,” because they tell the events in order for readers.
“evaporates,” “water vapor,” and “condenses,” because they name scientific processes and materials in the water cycle.
“important,” “whole thing,” and “again,” because they sound formal and help the explanation feel serious.
“tempo,” “meter,” and “downbeat,” because they are technical words that explain how clouds form.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'water goes up into the air' is vague; 'water evaporates, transforming from liquid to water vapor' is precise because 'evaporates' is the scientific term for the process and explains exactly what happens. In this scenario, Chen writes about the water cycle. The initial version uses vague language: 'goes up and makes clouds.' The revised version uses precise, domain-specific vocabulary: 'evaporates,' 'water vapor,' and 'condenses.' The domain-specific terms—evaporates, water vapor, condenses—make the explanation more scientifically accurate by naming the exact processes and states of matter. Choice B is correct because it accurately identifies the domain-specific vocabulary used. For example, it correctly identifies 'evaporates,' 'water vapor,' and 'condenses' as precise scientific terms that replace vague 'goes up' and 'makes,' explaining the actual processes rather than just describing motion. This demonstrates understanding that domain-specific vocabulary is more accurate than general language. Choice A represents the error of identifying vague terms as precise. Students who choose this may think any descriptive word is precise. This happens because students might confuse description with precision (thinking words that tell order = precise when precision means exact, appropriate technical terms), or not understand what makes vocabulary domain-specific (must be technical terms for that field, not just descriptive words). To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('big clouds,' 'goes up,' 'things'). Precise: specific, exact terms ('cumulonimbus clouds,' 'evaporates,' 'primary consumers'). Teach domain-specific vocabulary by subject: Science (organism, cell, evaporation, condensation, photosynthesis, ecosystem, producer, consumer, decomposer), Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation), Social Studies (taxation, representation, Parliament, constitution, amendment, sovereign, delegate), Arts (tempo, dynamics, perspective, composition, harmony, palette, medium). Practice revision: Give vague informational paragraph, have students identify vague words ('big,' 'things,' 'goes,' 'makes,' 'stuff,' 'gets'), then replace with precise, domain-specific terms.
Maya analyzed a song in informational writing. Which words were technical, domain-specific music vocabulary?
evaporation, condensation, and precipitation, because they explain what happens when music changes.
fast, loud, and nice, because they are easy words that everyone understands right away.
polygon, vertex, and quadrilateral, because they are technical terms for musical notes.
allegro, forte, and 4/4 meter, because they precisely describe tempo, dynamics, and rhythm.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'fast music' is vague; 'allegro tempo' is precise because 'allegro' is the musical term for a specific speed range (120-168 beats per minute). In this scenario, Maya writes about music analysis. The precise, domain-specific vocabulary includes 'allegro' (tempo marking), 'forte' (dynamics marking), and '4/4 meter' (time signature). These musical terms make the analysis more technically correct by specifying exact tempo, volume, and rhythmic structure. Choice A is correct because it accurately identifies the domain-specific vocabulary used. For example, it correctly identifies 'allegro,' 'forte,' and '4/4 meter' as precise musical terms that describe tempo, dynamics, and rhythm, replacing vague words like 'fast' and 'loud' with technical terminology. This demonstrates understanding that domain-specific vocabulary is more accurate than general language. Choice B represents the error of preferring vague terms over precise ones. Students who choose this may think easy words are better than technical terms. This happens because students might not recognize which terms are technical for the subject area, or believe that simple language is always preferable, not understanding that precision improves explanation by providing accurate, technical information. To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('big clouds,' 'goes up,' 'things'). Precise: specific, exact terms ('cumulonimbus clouds,' 'evaporates,' 'primary consumers'). Teach domain-specific vocabulary by subject: Science (organism, cell, evaporation, condensation, photosynthesis, ecosystem, producer, consumer, decomposer), Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation), Social Studies (taxation, representation, Parliament, constitution, amendment, sovereign, delegate), Arts (tempo, dynamics, perspective, composition, harmony, palette, medium). Practice revision: Give vague informational paragraph, have students identify vague words ('big,' 'things,' 'goes,' 'makes,' 'stuff,' 'gets'), then replace with precise, domain-specific terms.
Chen revised informational writing about the water cycle. Draft: "The water goes back to the ocean and the whole thing starts again." Revision: "Water accumulated in rivers or percolated into soil as groundwater, eventually flowing back to the ocean." What made the revised version more precise?
It used exact process words like percolated and groundwater, so readers learned how water moved instead of only that it returned.
It used emotional language about oceans, which explained the water cycle better than technical words about soil and water.
It repeated the same idea in more sentences, which made it precise even though it did not add details about movement.
It avoided science vocabulary, which helped readers imagine the cycle without needing any specific information or steps.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'water goes back' is vague; 'water percolated into soil as groundwater' is precise because it explains the specific process and destination. In this scenario, Chen revises writing about the water cycle. The initial version uses vague language: 'goes back to the ocean and the whole thing starts again.' The revised version uses precise, domain-specific vocabulary: 'accumulated,' 'percolated,' 'groundwater.' The domain-specific terms—accumulated, percolated, groundwater—make the explanation scientifically accurate about water movement. Choice A is correct because it accurately explains how precision improves the explanation. For example, it correctly recognizes that using exact process words like 'percolated' and 'groundwater' helps readers learn how water moved (through soil infiltration) instead of only that it returned, providing specific pathways rather than vague descriptions. This demonstrates understanding that precise terms explain processes technically. Choice B represents the error of thinking precision means avoiding technical vocabulary. Students who choose this may believe simple language is better or not understand that technical terms make explanations more accurate, not less accessible. This happens because students might think technical vocabulary makes writing harder to understand, when actually it makes explanations more accurate and informative. To help students use precise language and domain-specific vocabulary: Model thinking aloud: 'I could say the water goes back, but that's vague. The scientific terms are percolated into soil as groundwater, which explains exactly how water moves underground. That's more precise and informative.' Emphasize: Precise language shows understanding and helps readers learn accurately. Technical terms explain exactly what happens in natural processes.
Chen wrote informational writing about the water cycle. First draft: "Water goes up into the air and makes clouds. Then it comes back down as rain or snow." Revision: "Water evaporated into water vapor, rose into the atmosphere, and condensed into droplets that formed clouds. The droplets fell as precipitation." Which words showed precise, domain-specific vocabulary?
"transform," "process," and "complete" because formal words always counted as domain-specific vocabulary in science writing.
"ocean," "air," and "clouds" because they were common words that any reader would know in a science explanation.
"goes up," "makes clouds," and "comes back down" because they sounded clear and simple for informational writing about the water cycle.
evaporated, water vapor, atmosphere, condensed, and precipitation because they named exact science processes instead of vague actions.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'water goes up into the air' is vague; 'water evaporates, transforming from liquid to water vapor' is precise because 'evaporates' is the scientific term for the process and explains exactly what happens. In this scenario, Chen writes about the water cycle. The initial version uses vague language: 'goes up,' 'makes clouds,' and 'comes back down.' The revised version uses precise, domain-specific vocabulary: 'evaporated,' 'water vapor,' 'atmosphere,' 'condensed,' and 'precipitation.' The domain-specific terms—evaporated, water vapor, atmosphere, condensed, precipitation—make the explanation more scientifically accurate. Choice B is correct because it accurately identifies the domain-specific vocabulary used. For example, it correctly identifies 'evaporated' and 'condensed' as precise scientific terms that replace vague 'goes up' and 'makes clouds,' explaining the actual processes rather than just describing motion. This demonstrates understanding that domain-specific vocabulary is more accurate than general language. Choice A represents the error of identifying vague terms as precise. Students who choose this may think any simple word is good for science writing or not recognize which terms are technical for the subject area. This happens because students might not understand what makes vocabulary domain-specific (must be technical terms for that field, not just simple words). To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('big clouds,' 'goes up,' 'things'). Precise: specific, exact terms ('cumulonimbus clouds,' 'evaporates,' 'primary consumers'). Teach domain-specific vocabulary by subject: Science (organism, cell, evaporation, condensation, photosynthesis, ecosystem, producer, consumer, decomposer). Practice revision: Give vague informational paragraph, have students identify vague words ('big,' 'things,' 'goes,' 'makes,' 'stuff,' 'gets'), then replace with precise, domain-specific terms.
Jamal wrote informational writing about painting techniques. Vague: "I put paint on the paper in different ways." Precise: "I used impasto with a palette knife and added depth using glazing." Which words showed precise, domain-specific art vocabulary?
impasto, palette knife, and glazing because they named specific tools and methods artists used to apply paint.
"nice," "cool," and "interesting" because opinion words were the most technical way to explain art choices.
"put paint," "different ways," and "depth" because general phrases were always clearer than technical art terms.
Parliament, delegate, and sovereign because history terms explained how paint changed during a project.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'put paint on paper in different ways' is vague; 'used impasto with a palette knife' is precise because it names the specific technique and tool. In this scenario, Jamal writes about painting techniques. The initial version uses vague language: 'put paint on the paper in different ways.' The revised version uses precise, domain-specific vocabulary: 'impasto,' 'palette knife,' and 'glazing.' The domain-specific terms—impasto, palette knife, glazing—make the explanation technically correct for art. Choice B is correct because it accurately identifies the domain-specific vocabulary used. For example, it correctly identifies 'impasto,' 'palette knife,' and 'glazing' as terms that name specific tools and methods artists use to apply paint, replacing vague 'different ways' with exact artistic techniques. This demonstrates understanding that domain-specific vocabulary is more accurate than general language. Choice C represents the error of using vocabulary from the wrong domain. Students who choose this may not understand that different subjects have different technical vocabularies or think any formal words count as domain-specific. This happens because students might not recognize that domain-specific means technical terms for that particular field (art terms for art, not history terms). To help students use precise language and domain-specific vocabulary: Teach domain-specific vocabulary by subject: Arts (tempo, dynamics, perspective, composition, harmony, palette, medium, impasto, glazing). Practice revision: Give vague informational paragraph, have students identify vague words, then replace with precise, domain-specific terms. Teach why precision matters: Precise language shows understanding and helps readers learn accurately about specific techniques.
Diego wrote informational writing about shapes. Vague: "A triangle has three sides and three corners." Precise: "A triangle is a polygon with three sides and three vertices." Which version used vague language instead of precise terms?
The precise version, because polygon and vertices were general words that did not explain a triangle clearly.
Neither version was vague because any word about shapes counted as technical vocabulary in geometry.
Both versions were equally vague because they both mentioned three sides and did not include any math vocabulary.
The vague version, because "corners" was less specific than the geometry term vertices used in the revision.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'corners' is vague; 'vertices' is precise because it's the mathematical term for the points where sides meet in a polygon. In this scenario, Diego writes about shapes. The initial version uses vague language: 'corners.' The revised version uses precise, domain-specific vocabulary: 'polygon' and 'vertices.' The domain-specific terms—polygon, vertices—make the explanation mathematically precise. Choice C is correct because it accurately identifies which version used vague language. For example, it correctly recognizes that 'corners' in the vague version was less specific than the geometry term 'vertices' used in the revision, showing that everyday words like 'corners' are vague compared to mathematical terminology. This demonstrates understanding that replacing vague words with exact terms improves informational writing. Choice A represents the error of misidentifying which terms are precise. Students who choose this may think 'polygon' and 'vertices' are general words or not recognize these as specific geometry terms. This happens because students might not recognize which terms are technical for the subject area or think unfamiliar words must be vague. To help students use precise language and domain-specific vocabulary: Teach difference between vague and precise—Vague: general, everyday words ('corners,' 'sides'). Precise: specific, exact terms ('vertices,' 'polygon'). Teach domain-specific vocabulary by subject: Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation). Emphasize: Use technical terms correctly. 'Corners' might work in everyday speech, but 'vertices' is the precise mathematical term.
In Sofia’s informational math writing, which words were precise, domain-specific vocabulary?
mean, data set, and sum were math technical terms that named exact steps, not general actions, so readers could follow and repeat her method.
evaporation, condensation, and precipitation were domain-specific, but they were science terms and did not appear in Sofia’s mean calculation writing.
“Did the problem,” “using numbers,” and “some adding” were precise because they sounded confident, even though they did not name the exact math operations.
tempo, forte, and measure were the most precise words because they are technical terms, but they belong to music, not Sofia’s math explanation.
Explanation
This question tests the ability to use precise language and domain-specific vocabulary to inform about or explain a topic in informational/explanatory writing (CCSS.W.5.2.d). Students must replace vague, general language with exact, technical terms appropriate for the subject area, making explanations more accurate and informative. Precise language means using exact, specific words instead of vague, general words. Domain-specific vocabulary refers to technical terms used in particular subject areas—science (evaporation, photosynthesis, precipitation), math (sum, mean, polygon, congruent), social studies (taxation, representation, sovereign), arts (tempo, perspective, palette). For example, 'did the problem' is vague; 'calculated the mean by finding the sum and dividing by the quantity' is precise because it uses mathematical terms that explain exactly what operations were performed. In this scenario, Sofia writes about calculating the mean in mathematics. The question asks students to identify which words are precise, domain-specific vocabulary for math. The domain-specific terms—mean, data set, sum—make the explanation mathematically precise. Choice A is correct because it accurately identifies the domain-specific vocabulary used in mathematics. For example, it correctly identifies 'mean,' 'data set,' and 'sum' as math technical terms that name exact steps, not general actions, so readers could follow and repeat her method. This demonstrates understanding that domain-specific vocabulary provides exact terminology for mathematical operations. Choice B represents the error of identifying vague terms as precise. Students who choose this may think confident-sounding phrases equal precision or not recognize which terms are technical for mathematics. This happens because students might not understand that precision requires specific mathematical terminology, not just confident language. To help students use precise language and domain-specific vocabulary: Teach domain-specific vocabulary by subject: Math (sum, product, quotient, mean, median, polygon, vertex, congruent, perimeter, area, equation). Practice revision: Give vague informational paragraph, have students identify vague words ('did the problem,' 'using numbers'), then replace with precise, domain-specific terms. Emphasize: Use technical terms correctly. If you don't know the precise term, learn it—that's part of mastering the subject.