8th Grade ELA Quiz: Conduct Research And Generate Questions

What this quiz covers

This quiz focuses on Conduct Research And Generate Questions, giving you a quick way to practice the rules, question types, and explanations that matter most for 8th Grade ELA.

How to use this quiz

Try each quiz question before looking at the correct answer. Use the explanations to review missed ideas, then come back to similar questions until the pattern feels familiar.

Question 1

1. “How has the growth of every social media platform changed communication, politics, and relationships worldwide since the 1990s?”
2. “How do popular social media apps shape the way people around the world think, feel, and behave today?”
3. “How does daily Instagram use relate to self-esteem and sleep habits in teenagers?” (correct answer)
4. “How did early websites and companies develop the first social media platforms over time?”

Explanation: The strongest revision narrows the topic to something you could actually investigate in a week with three sources. Asking how daily Instagram use relates to self-esteem and sleep habits in teenagers names one platform, one behavior, two measurable effects, and one age group—specific enough that a news article, psychology website, and documentary clip could each contribute evidence. The choice about every platform changing communication, politics, and relationships worldwide since the 1990s is still far too broad, covering decades and the whole planet—no three sources could answer it in a week. The choice about how popular apps shape the way people everywhere think, feel, and behave sounds specific but keeps the same problems as the original question: 'people around the world' and 'think, feel, and behave' cover almost everything. The choice about how early companies developed the first platforms is really a history fact-lookup; it drifts away from studying social media's effects and doesn't need synthesis across your sources. Only the Instagram question focuses the scope while keeping real research value.

Question 2

1. How do healthy eating needs change for people of every age across the world’s different cultures and climates?
2. How can an 8th grader build a balanced school lunch using MyPlate guidelines and our cafeteria menu? (correct answer)
3. What makes some everyday foods count as healthy choices while others are considered less healthy for teens?
4. How do the chemical structures of glucose and other sugars affect the way the human body stores energy?

Explanation: The strongest refinement narrows the question to a specific age group, a specific meal, and a specific practical goal: helping an 8th grader plan a balanced school lunch. This scope fits the 5-day limit and lets you actually use all four sources together—MyPlate for meal structure, the pediatrician page and teen nutrition book for what adolescents need, and the cafeteria menu for real choices. The option about eating needs across every age, culture, and climate is still far too broad to answer well in 5 days, and your sources focus on teen nutrition, not the whole world. The option asking what makes some foods healthier than others for teens sounds reasonable but stays vague—it never narrows to a workable, answerable project and offers no plan for using the menu or MyPlate. The option about the chemical structure of glucose and how the body stores energy shifts to biochemistry, which your nutrition-focused sources can’t support and which drifts away from meal planning. Only the school-lunch question matches your sources, timeframe, and purpose while staying meaningful.

Question 3

1. The student researched well by keeping each source in its own paragraph; separating evidence this way is exactly what good synthesis of multiple sources looks like.
2. The student used too few sources; a serious project needs many more than four, so they should gather additional textbooks, articles, and captions to be credible.
3. The student has multiple sources but did not synthesize them; they should combine evidence to explain major push/pull factors and show how sources support or differ. (correct answer)
4. The student framed the question poorly, since a migration this large has too many causes to research and no single write-up could ever connect that much evidence.

Explanation: The heart of research isn't collecting facts—it's connecting them. This student gathered four solid sources but left each fact stranded in its own paragraph. The best evaluation notes that the student has multiple sources but never synthesized them, and should combine the evidence to explain major push/pull factors (like discrimination pushing people from the South and factory jobs pulling them North) and show where sources agree or differ. That's the skill being tested. The option praising the student for keeping each source separate is wrong: separation is the actual problem, not a sign of synthesis. The option claiming four sources is too few misfires because four appropriate sources is plenty for a one-week project—the trouble is how they're used, not how many there are. The option saying the question was framed poorly is also wrong: "Why did people join the Great Migration?" is a clear, answerable research question, and the causes can absolutely be connected—that's exactly what synthesis does. Only one choice correctly identifies that the student needs to weave the sources together into a single explanation.

Question 4

1. “What makes a park beautiful to visit (design, plants, views)?” “Why do people enjoy spending time outdoors in general?” “Which country has the most impressive public parks worldwide?”
2. “How many public parks currently exist across the entire world?” “When were the very first city parks originally invented?” “What is the largest park anywhere on the planet?”
3. “How does the city collect community feedback about parks (surveys, meetings, online forms)?” “What criteria are used to choose a park location (safety, walkability, equity)?” “How does park funding work (grants, taxes, donations)?” (correct answer)
4. “How do nearby cities handle their own park planning (timelines, priorities, costs)?” “What role do local businesses play in supporting new parks?” “How long does building a park usually take?”

Explanation: The keyed set works because each question grows directly out of what the student already discovered: they learned decisions combine community feedback, land factors, and budget, so they now dig deeper into each one—how feedback is gathered, what criteria pick a location, and how funding works. Every question is focused enough to answer in a week using the same kinds of local sources, and together they open three different but related paths. The set asking what makes a park beautiful, why people enjoy the outdoors, and which country has the most impressive parks drifts away from the original question about how the city makes decisions—it explores taste and global comparisons instead of the local decision process. The set counting how many parks exist worldwide, when parks were invented, and the largest park on Earth asks trivia-style lookup questions that don't build on the student's findings and can't be answered with local city sources. The set about nearby cities, local businesses, and how long building takes is tempting because it sounds practical, but it shifts focus to other cities and construction timelines rather than extending how OUR city decides where to build—so it wanders off the original inquiry. Only the keyed set stays anchored to the city's actual decision-making while branching into feedback, criteria, and funding.

Question 5

1. “Why did people in the South decide to move north during this time?” “What made life hard for African Americans in the southern states?” “How did factory jobs during World War I open up new work?”
2. “How did northern newspapers and recruiters influence decisions to move?” “How did housing policies in northern cities affect migrants after they arrived?” “How did the Great Migration change music or culture in Chicago?” (correct answer)
3. “How did migration shape every American city over the last two hundred years?” “Why do people everywhere leave their homes for new places?” “What role has movement played across all of world history?”
4. “In which year did the Great Migration first begin in the country?” “In which year did this large movement of people finally end?” “Which northern states received the largest number of migrants?”

Explanation: The best set asks about northern newspapers and recruiters, housing policies after migrants arrived, and cultural change in one city like Chicago. These questions grow directly out of what Jordan already found, push the research into new directions (persuasion, policy, culture), and each is narrow enough to answer in another one-week project. The set about why people moved north, southern hardships, and wartime factory jobs is weak because Jordan already answered these in the first project—they repeat findings instead of extending them. The set about every American city over two hundred years, people everywhere, and all of world history is far too broad to research in a short project; no single week of sources could cover that scope. The set asking which year it began, which year it ended, and which states received the most migrants only calls for single facts you could look up in minutes—these aren’t open questions that require synthesizing sources, so they don’t extend the inquiry.

Question 6

1. “How does music influence a listener’s mood?” “Does the tempo of a song change how it makes people feel?” “Do different age groups react differently to the same songs?”
2. “Which types of tasks (math practice vs reading) are most affected by background music?” “Does volume level change the effect?” “Do results differ for students who say they’re easily distracted?” (correct answer)
3. “How has recorded music technology developed over the last century?” “Which musical styles became popular in each decade?” “How did radio and streaming shape listening habits worldwide?”
4. “Is instrumental music better than music with lyrics for concentration?” “Should schools play music during class time?” “Do most students prefer studying with music or in silence?”

Explanation: The strongest set asks about the specific variables that could explain why the two studies disagree: whether the task is math or reading, how loud the music is, and whether easily distracted students respond differently. Each question is narrow enough to investigate in a few days and directly targets the conflict between the sources, so it extends the original inquiry instead of leaving it. The mood-and-tempo set is researchable, but it drifts to how music makes people feel rather than how it affects studying, so it never addresses the concentration conflict. The recorded-music-technology set is focused and answerable, yet it turns into a history-of-music project that has nothing to do with comparing the two studies' claims. The instrumental-versus-lyrics set stays on the topic of studying and even names a real variable, but it mixes in opinion and preference questions ('Should schools play music?', 'Do students prefer music or silence?') that ask what people like rather than investigating why the studies reached different results. Only the first set consistently probes the conditions that might reconcile the conflicting findings.

Question 7

1. Priya's method is sound because one clearly written online source can fully answer her question; adding more sources would only repeat the same information she already found.
2. Priya's real problem is her question itself, since concentration is too vague to study; she should replace it with a narrower topic that has one obvious factual answer.
3. Priya relies on a single, possibly unreliable source and makes an overconfident claim; she should use multiple credible sources and compare evidence. (correct answer)
4. Priya's topic is far too broad for five days, so her question is the weakness; she should widen it to cover how all nutrition choices affect every part of learning.

Explanation: The best answer points out that Priya trusted one blog post by an unknown author and then made a sweeping claim that dehydration "always" cuts scores in half. Good short research uses several credible sources, checks who wrote them, and keeps claims matched to the evidence—so this option names the actual problem and the fix. The choice saying one clear online source is enough is wrong because being online does not make a source reliable, and a single source cannot confirm a strong claim or reveal errors and bias. The choice blaming her question for being too vague is wrong because attention and test performance are regularly measured, and her focused question is fine—her sourcing is the issue. The choice calling her topic too broad is also wrong: a question about dehydration and concentration is well scoped, and widening it to all nutrition and all learning would make a 5-day project unmanageable. Only the answer about using multiple credible sources and comparing evidence fixes what actually went wrong.

Question 8

1. “What have scientists learned about the layers of a rainforest, and where can our class find that information quickly?”
2. “How have community gardens in our city affected access to fresh produce in the last five years, and what challenges do organizers report?” (correct answer)
3. “What has caused the history of food, science, cooking, and farming to develop the way it has across the whole world?”
4. “Which community garden in our city is the prettiest, and which one would most people say they personally like best?”

Explanation: The best research question is the one about how community gardens have affected access to fresh produce over five years and what challenges organizers report. It is focused on one city and one timeframe, yet it opens several paths to explore—neighborhood differences, funding, health effects—and it truly needs multiple sources: books on urban gardening, websites with local data, and an interview with organizers. The rainforest question sounds researchable, but it points to facts you can look up in a single reference and even asks where to find them fast, so it needs no real synthesis across sources. The question about the history of food, science, cooking, and farming across the whole world is far too broad for a 3–5 day sprint; you could never cover that scope with 2–5 sources. The question about which garden is the prettiest and which one people personally like best asks for opinions and personal preferences, which sources cannot answer or prove. Only the fresh-produce question matches the assignment's scope, source variety, and room to extend—so it is the single best choice.

Question 9

1. They are mostly opinions, so they cannot be used to estimate savings.
2. They are varied and relevant: real school data plus expert info and efficiency comparisons, which can be synthesized to estimate savings within a week. (correct answer)
3. They are not appropriate because only a single source is allowed in a short project.
4. They are too many sources for a week because any project with more than two sources is impossible.

Explanation: Tests conducting short research projects to answer questions (including self-generated questions), drawing on several sources (multiple not single), and generating additional related focused questions that allow multiple avenues of exploration extending initial inquiry. Short research projects develop research skills through manageable focused investigations: student self-generates specific question "How much electricity could our school save by switching classroom lights from fluorescent to LED?" and plans 5 sources combining real data with expert information for comprehensive analysis within 1-week timeframe. Drawing on several sources strengthens research through variety and relevance: school's electric bill provides actual baseline usage data (real numbers for current costs), district facilities webpage offers context about current lighting systems, government calculator enables standardized savings projections, article comparing LED vs fluorescent supplies technical efficiency data, custodian interview contributes practical insights about implementation—together these sources provide quantitative data, technical specifications, and practical considerations necessary for estimating savings. Answer B correctly explains sources are varied and relevant: real school data plus expert info and efficiency comparisons, which can be synthesized to estimate savings within a week—the combination allows student to calculate current usage (from bill), understand current system (from facilities page and custodian), research LED efficiency advantage (from comparison article), apply savings calculator (government tool), and consider practical factors (custodian's experience)—synthesis produces estimated savings grounded in actual school data and technical research. The incorrect options misunderstand appropriate source use: A dismisses sources as opinions when bill provides hard data, calculator uses established formulas, and article presents technical specifications; C incorrectly claims only single source allowed when multiple sources are required for synthesis; D suggests more than two sources makes project impossible when 5 sources are manageable in week for focused question. Effective source selection for estimation requires: real baseline data (electric bill shows actual usage/costs), technical information (efficiency comparisons provide percentage improvements), practical context (custodian knows number of fixtures, usage patterns, maintenance needs), calculation tools (standardized method for projecting savings), authoritative information (government and district sources ensure accuracy)—combining quantitative and qualitative sources enables realistic estimation. Student demonstrates sophisticated research planning: self-generated question addresses real school issue, source selection balances data with expertise, variety enables comprehensive analysis, all sources accessible within week—showing how focused question with well-chosen sources makes meaningful research feasible in short timeframe.

Question 10

1. Yes; they are related to environmental impact, are specific enough to investigate, and open different directions (waste systems, materials, and microplastics). (correct answer)
2. No; they wander off topic because donation and washing questions abandon environmental impact for unrelated consumer shopping trends and product costs.
3. No; they are too broad because each question would require studying every textile and pollution source before it could be answered.
4. Yes; but only because they repeat the original question in three slightly reworded forms rather than opening any new directions.

Explanation: The correct answer is that these questions do extend the research well. Each one grows out of what the student learned about fast fashion and the environment, yet points in a fresh direction: donation programs explore waste systems, materials explore carbon footprint, and washing habits explore microplastics. All three are focused enough to investigate in a few days with several sources, so they build on the original inquiry instead of drifting away or repeating it. The choice claiming the questions wander off topic is wrong—donation, materials, and washing are all environmental impacts of clothing, not unrelated shopping trends. The choice calling them too broad is also wrong: each question targets one specific aspect (donation programs, named materials, washing microplastics), not every textile or pollution source. The final choice is wrong because the three questions cover clearly different topics rather than restating the original question, so they open new directions, not just reword one idea.

Question 11

1. “Which flowers in the garden look the most colorful to visitors this spring?” “Do more insects show up on warm days than on cool days outside?” “What kinds of gardens do most schools in the country choose to plant?”
2. “How does changing bloom times (adding early-spring flowers) affect pollinator visits over two weeks?” “How do pesticide-free practices compare to other methods for increasing pollinators at school?” “Which native plants would support pollinators that were rare in our observations?” (correct answer)
3. “Which insects live in every region of the world, and what does each of them eat?” “How do all the world’s gardens differ in the plants that people grow there?” “What is the total number of pollinator species found across the entire planet?”
4. “What is the scientific name of one bee species that visited the garden?” “How many petals does a typical daisy have on a single bloom?” “What year did our school first decide to plant a garden here?”

Explanation: The best set builds directly on what Tasha actually found and stays small enough to investigate in another short project. Because she learned bloom timing matters, she can test adding early-spring flowers; because the sponsor mentioned pesticide-free areas, she can compare that practice to others; because some pollinators were rare, she can ask which native plants would support them. Each question grows from a specific finding and points to a new, focused direction. The colorful-flowers set drifts into opinion and vague topics—“look most colorful” isn’t measurable, and “what gardens do most schools plant” abandons her local investigation. The world-insects set is impossibly broad: cataloging every insect on the planet or every garden worldwide can’t be researched in a week and drops her school focus. The last set asks isolated fact-lookups—one bee’s scientific name, a daisy’s petal count, the garden’s founding year—that you answer once and stop; none extends her research or connects to her findings about attraction and management. Only one set turns her discoveries into testable, appropriately sized next questions.

Question 12

1. “Which printing press design was the largest ever built in Europe?” “What materials and colors were used to make early printing ink?” “How many books did the very first presses produce each day?”
2. “How did the printing press affect the Reformation in one specific region?” “How did governments respond to the faster spread of ideas (censorship or licensing)?” “How did printing change who could afford books over the next 100 years?” (correct answer)
3. “How did every invention in human history change the way that people everywhere shared their ideas?” “Why do all new technologies always improve every society that uses them across all of time?”
4. “Was Johannes Gutenberg considered a famous person during his own lifetime in Europe?” “In what year was Gutenberg born, and in what year did he eventually die?” “Where did Gutenberg live?”

Explanation: The best set takes what Diego actually learned and pushes it further into focused, researchable questions. Because his sources showed printing spread religious ideas, he asks how it affected the Reformation in one specific region; because faster spread creates control problems, he asks how governments responded with censorship or licensing; because copying became cheaper, he asks how affordability changed over 100 years. Each question grows from a finding, stays narrow enough for another short project, and opens a different angle—religious, political, and economic. The set asking about the largest press design, ink materials, and daily book counts stays on physical trivia; these facts don’t extend his conclusion about how ideas spread. The set asking about every invention in history and whether all technologies always improve every society is far too broad to research in four days and abandons the printing-press focus entirely. The set asking whether Gutenberg was famous, when he was born and died, and where he lived seeks simple biographical facts rather than extending what he learned about printing’s impact on ideas. Only the middle set turns research findings into new, focused inquiry.

Question 13

1. How is trash defined by our district, and what everyday items do most people throw away without thinking about where the waste ends up afterward?
2. How can our cafeteria reduce food waste this semester, and which strategies (share table, composting, smaller portions) are best supported by evidence from our audit and outside sources? (correct answer)
3. What are all the important changes in recycling programs across the entire world from the year 1900 up to today, and why did each one happen?
4. Did our cafeteria throw away exactly 312 milk cartons last Tuesday, and was that number higher or lower than the total counted on the previous Monday?

Explanation: The best question names a specific place (our cafeteria), a clear goal (reducing food waste this semester), and several strategies to compare (share table, composting, smaller portions). Because it asks which strategies the evidence best supports, you must pull data from the audit and combine it with the outside sources—giving you several paths to explore that still fit in one week. The definition question only asks what trash is and what people throw away; you could answer it with a quick look-up, so it doesn't require you to weigh evidence or explore options. The worldwide recycling-history question is far too broad for a 1-week project with just a few sources—you could never cover every change across the whole world since 1900. The milk-carton question is too narrow: it asks for one exact count on one day, which is a single fact to verify, not a question that needs multiple sources and real synthesis. Only the cafeteria food-waste question is both focused and open enough to support genuine research.

Question 14

1. “Which native plants appear in the community garden list?”, “What did the field guide say about local native flowers?”, and “Which pollinators did the observation notes already record visiting?”
2. “Which neighborhood garden has the prettiest overall arrangement of flowers?”, “Should every household in the city be required by law to plant natives?”, and “What is the single best plant that everyone everywhere should grow?”
3. “How do bloom season and flower shape affect which pollinators visit?”, “Which 3 native species would be best for a shaded school courtyard and why?”, and “How do pesticides used on ornamentals change pollinator visits according to extension sources?” (correct answer)
4. “How many pollinator species exist across the entire planet Earth?”, “What are all the ecosystems that can be found anywhere in the world?”, and “What is the total number of native plants growing on every continent?”

Explanation: The best set opens genuinely new, focused directions that grow out of what Aiden already learned. Asking how bloom season and flower shape affect visits deepens the plant–pollinator idea; asking which 3 native species suit a shaded courtyard applies findings to a new setting with a real constraint; asking how pesticides change visits investigates a factor discovered during research. Each is specific, researchable, and points somewhere different—exactly what “extends into different focused directions” means. The set asking which plants are in the garden list, what the field guide said, and which pollinators the notes recorded only re-gathers information Aiden already collected, so it repeats the project instead of extending it. The set about the “prettiest” arrangement, a legal planting requirement, and the “single best plant everywhere” mixes subjective taste, a policy demand, and an impossible universal claim—none is a focused, researchable extension. The set counting all pollinator species on Earth, all ecosystems worldwide, and native plants on every continent is impossibly broad and cannot be answered by a short neighborhood study. Only one set both narrows scope and moves the inquiry forward.

Question 15

1. It is too broad because covering the effects of every civil rights law on voting nationwide would require far more than a week and dozens of sources.
2. It is focused and time-bounded (place + years + topic), and the planned sources are accessible enough to answer it in about a week. (correct answer)
3. It is too narrow because the change in access can be settled with one date from a single source, so gathering several sources is unnecessary work.
4. It is unanswerable because state-level voting records from the 1960s were sealed and only available to researchers with special government clearance.

Explanation: The best answer recognizes that Jordan's question is scoped tightly by place (Mississippi), time (1964–1968), and topic (the Voting Rights Act's effect on access), which makes it manageable in five days—and his planned mix of a textbook, National Archives documents, a student article, and a newspaper retrospective are all reachable and let him synthesize how access actually changed. The "too broad" choice misreads the question: it treats it as covering every voting law across the whole country, but Jordan limited himself to one act, one state, and four years, so it is not broad at all. The "too narrow" choice is wrong because explaining how access changed requires combining legal text, real data, and local effects—not a single date or yes/no lookup, so multiple sources genuinely help. The "unanswerable" choice invents a false barrier: voting-law history and 1960s civil rights records are public through archives, libraries, and educational sources like the ones Jordan already listed, so no special clearance is needed.

Question 16

1. “What are the most effective policies that every country worldwide should adopt to completely end global warming in the coming decades?”
2. “How has the number of extremely hot days changed in our state over the last 30 years, and what impacts does that have on students’ outdoor activities?” (correct answer)
3. “In what ways have rising temperatures, shifting rainfall, and melting ice altered ecosystems and communities across the whole planet over time?”
4. “What are the causes, effects, and possible solutions of climate change for every ecosystem and region found on Earth?”

Explanation: The best revision narrows the topic enough to finish in a week with the four sources: it names one place (our state), one clear measure (extremely hot days), one timeframe (30 years), and one specific impact (students’ outdoor activities). NASA data and the local heat-day story directly support it, and the textbook explains the science—so Sam can synthesize sources instead of just looking up one fact. The policy question asking what every country should do to end global warming stays impossibly broad and shifts to global solutions no student could research from four sources in a week. The question about how rising temperatures, rainfall, and melting ice have altered ecosystems worldwide sounds detailed, but 'across the whole planet' keeps the scope as wide as the original. The question covering causes, effects, and solutions for every ecosystem and region on Earth actually widens the topic instead of focusing it. Only the state-and-students question tightens the question while staying answerable with Sam’s sources.

Question 17

1. “How does bottled water get contaminated?”, “Why do so many people worry about microplastics in the water they drink?”, and “Are the plastic pieces found in bottled water the same size as pieces found in other foods?”
2. “Which bottled water brand contains the most microplastics of any brand sold worldwide?”, “How could countries pass laws to ban plastic packaging everywhere?”, and “What would happen to the ocean if every company stopped using plastic bottles?”
3. “How do sampling steps (like rinsing bottles and wearing cotton vs. synthetic clothing) change microplastic counts?”, “How do microscopy and spectroscopy compare for identifying plastic types in a school-friendly summary?”, and “Do microplastic counts differ between bottled water and filtered tap water in our town?” (correct answer)
4. “What is the chemical formula that scientists use to describe common plastics?”, “Who first invented and started selling bottled water for people to buy?”, and “When did companies begin putting drinking water into plastic bottles instead of glass?”

Explanation: The best set asks how sampling steps change counts, how microscopy and spectroscopy compare, and whether bottled water differs from local tap water. These questions grow directly out of Maya's findings: they extend the "contamination control matters" agreement, dig into the "which method is most accurate" disagreement, and apply her learning to a local comparison. Each is specific, answerable in a few days, and points research in a different focused direction. One set asks broad, feelings-based questions—how contamination happens, why people worry, whether pieces match other foods—that stay vague and don't build on her method-and-contamination work. Another set is far too big for a one-week project: ranking every brand worldwide, imagining global plastic bans, and predicting ocean-wide effects are policy and scope questions, not measurement ones she could actually investigate. The last set is just single-fact lookups—a chemical formula, who invented bottled water, and when plastic bottles replaced glass—that could be answered with one quick search and don't require synthesizing or extending her research at all. Only the first set turns what she found into new, focused investigations.

Question 18

1. Revise to: “What materials and manufacturing steps are used to produce a standard single-use plastic grocery bag today?”
2. Revise to: “What are all the environmental, economic, social, and legal arguments for and against banning single-use plastic bags in cities?”
3. Revise to: “What were the environmental and economic effects in the first year after a plastic bag ban in a nearby city, and what evidence suggests similar effects might happen here?” (correct answer)
4. Revise to: “How have consumer shopping habits and waste levels changed globally in every country that has restricted plastic products?”

Explanation: A strong one-week research question stays specific enough to answer with the available sources while still opening several lines of inquiry. The winning revision focuses on one nearby city, one timeframe (the first year), and two measurable effect types (environmental and economic), then asks what evidence predicts similar results here—so Harper can use the ordinance text, environmental group, grocery manager, economics explainer, and council packet, and still explore multiple angles. The question about a bag’s materials and manufacturing steps is too narrow: it’s a single factual lookup with no room for multiple avenues of exploration. The question asking for all arguments for and against a ban across cities is too broad and unfocused—covering every social and legal angle in every city can’t be researched well in a week. The question about global shopping habits and waste in every country that has restricted plastics is also too broad; that worldwide scope is impossible to answer well with five local sources in a week. Only the focused revision balances a manageable scope with real depth.

Question 19

1. Her sources are already varied and balanced, so the promotional webpage is likely the most reliable option for explaining the technology's real limitations and risks.
2. Her sources may be biased or unverifiable, so she should add an independent, student-friendly source (such as a reputable tech explainer on accuracy and bias) and compare claims across them. (correct answer)
3. Her plan should drop the encyclopedia entry and lean mainly on the video, since a clear visual demonstration usually explains a technology better than written text can.
4. Her sources are fine for background, but she should spend the week hands-on testing facial recognition on classmates instead of researching how it actually works.

Explanation: Priya's question needs sources that reliably explain how facial recognition works AND its limitations. Her three picks are all shaky: a promotional page tends to emphasize benefits and hide problems, an encyclopedia entry gives basics but little on accuracy or bias, and an uncited video can't be checked for reliability. The best critique points this out and fixes it—add an independent, student-friendly source (like a tech explainer on accuracy and bias) and compare what each source claims. That's how you spot where sources agree, disagree, or leave things out. The choice calling her sources 'varied and balanced' and trusting the promotional page for limitations is wrong: a company has a conflict of interest and won't stress its own product's flaws. Leaning mainly on the video is wrong too—a visual demo might show the technology in action, but an uncited video isn't verifiable and doesn't cover accuracy or bias. Replacing research with hands-on testing on classmates misses the point: trying it out won't explain how the technology works or reveal documented concerns about bias and privacy. Only the choice that questions credibility and adds an independent source you can compare gives Priya a source plan strong enough to answer her question well.

Question 20

1. “How does the amount of sleep teenagers get each night shape their overall health, mood, learning, and social life over time, according to experts?”
2. “How do sleep habits across every age group worldwide affect health, and what nationwide policies should governments and schools adopt to fix the problem?”
3. “How does getting 7 vs. 9 hours of sleep affect 8th graders’ attention and mood during the school day, according to health and psychology sources?” (correct answer)
4. “How have scientists historically defined sleep, and what physical stages does the human body cycle through during a full night of rest?”

Explanation: The best revision names a specific comparison (7 vs. 9 hours), a specific group (8th graders like Lila), specific effects (attention and mood), a specific setting (the school day), and source types that match what she has. That scope is focused enough to answer in four days, yet open enough to require combining her three sources. The option about how sleep shapes “overall health, mood, learning, and social life” stays too broad—it packs in many effects and no comparison, so four days and three sources can’t cover it. The option about “every age group worldwide” and “nationwide policies” has an impossible scope and drifts into a separate policy question beyond sleep’s effects. The option asking how scientists define sleep and what stages the body cycles through is a factual lookup with a settled answer, not an open inquiry that needs synthesis. Only the keyed question balances real focus with genuine research.