Use of evidence

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PSAT Reading & Writing › Use of evidence

Questions 1 - 10
1

A mid-sized city tested a bus-priority pilot: painted dedicated lanes on three of its busiest corridors during rush hour and adjusted signal timing. GPS logs show average bus travel times on those corridors dropped by 12 percent, with variability halved; on control corridors without changes, no improvement was detected. A rider survey taken during the pilot found 60 percent of respondents on the treated corridors reported arriving on time more often; on untreated corridors, responses were unchanged. Due to budget limits, officials must decide how to scale the program. The available evidence establishes benefits only on the corridors where changes were made, so in choosing next steps, the city can conclude that _______.

Which choice most logically completes the text?

The city should immediately convert every arterial into a bus-only street.

The pilot does not provide evidence about effects on corridors that differ from those modified.

The observed gains occurred because riders started arriving earlier for their buses.

The survey proves that improved reliability increases total transit funding.

Explanation

Only B states the warranted limit of the findings: the data pertain to the treated corridors, not different ones. A is an unsupported policy leap, C reverses cause and effect, and D is a non sequitur unrelated to the measured outcomes.

2

After a schedule overhaul in early 2023, the city's transit department reviewed average weekday bus ridership on three routes that serve downtown. Officials claim that ridership rose on all routes compared with 2022 levels. The table summarizes the counts. Counts reflect spring averages, collected on comparable weekdays. (Grayscale table; Times New Roman) Average Weekday Ridership (riders/day) Route | 2022 | 2023 A | 1800 | 2000 B | 1350 | 1500 C | 900 | 1000

Which choice best describes data from the table that support the claim?

Route A had the highest ridership in 2023.

Each route increased from 2022 to 2023: +200 (A), +150 (B), +100 (C).

Total weekday ridership in 2023 exceeded 5,000 riders/day.

Weekend ridership trends were similar across routes.

Explanation

The table shows increases of 200 (A), 150 (B), and 100 (C), confirming that ridership rose on all routes. A is irrelevant to the claim, C is numerically incorrect, and D cites weekend data not shown.

3

Some education researchers argue that adolescent biology renders early school start times misaligned with students' natural sleep patterns. According to chronobiology studies, teenagers experience a delayed release of melatonin, making it difficult for them to fall asleep before 11 p.m. A policy analyst contends that therefore, moving the first bell at least 45 minutes later should measurably improve learning, not merely by boosting attendance or convenience, but by enabling students to obtain more total sleep and more REM sleep just before waking. The analyst dismisses claims that homework load and extracurriculars are the principal drivers of fatigue, noting that comparable workloads yield different outcomes depending on start times. If increased sleep quantity and quality are truly the mechanisms at work, then later starts should produce academic gains even when other school practices remain unchanged.

Which finding, if true, would most directly support the scholar's claim?

After several districts delay start times, teenage car accidents drop by 20% within a year.

Schools that add a free breakfast program report a 5% rise in daily attendance.

In a randomized multi-district pilot, students in schools shifting the first bell 50 minutes later slept 43 minutes more per night and outperformed control schools on standardized math exams by 0.2 SD without other policy changes.

A national survey of college students finds that most prefer afternoon classes to morning classes.

Explanation

Choice C directly ties later start times to increased sleep and improved test performance in adolescents through a randomized comparison with no other changes. A is about safety, B concerns attendance/nutrition, and D targets a different population, so none address the causal sleep-to-learning mechanism.

4

While researching a topic, a student has taken the following notes:

  • Pilot at Lincoln Middle began 2023; weekly gardening and tasting sessions during science classes.
  • Surveys showed 60% more students choosing vegetables at lunch after ten weeks.
  • Participants averaged 35 additional minutes of moderate outdoor activity each week.
  • Teachers reported improved attention during afternoon classes on gardening days.
  • Program funded by small grants and a local grocer's donation of seeds and tools.
  • Families attended two harvest nights; community volunteers logged 120 hours maintaining beds. Goal: Emphasize the program's benefits for students' health.

The student wants to emphasize the program's health benefits for students. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Funded by small grants and a local grocer's donations, the garden relied on families attending harvest nights and 120 hours of community volunteer maintenance to keep the beds productive.

Teachers observed improved afternoon attention on gardening days, and weekly sessions were built into science classes beginning in 2023 to connect the activities with classroom learning.

The program supported healthier habits: after ten weeks, 60% more students chose vegetables at lunch, and participants gained about 35 extra minutes of moderate outdoor activity each week.

The program improved student health by cutting sugary drink purchases in half and extending sleep on gardening days, demonstrating clear lifestyle changes beyond the school lunchroom.

Explanation

C cites increased vegetable choice and added physical activity, the health outcomes in the notes. A and B focus on logistics or attention, not health; D claims effects not supported by the notes.

5

To test whether applying a thin layer of moss to residential roofs cools homes in summer, researchers instrumented sixteen houses: eight with north-facing, dark-shingle roofs were partially inoculated with a maintained moss layer; eight similar roofs were left untreated. Over six weeks of clear weather, afternoon roof-surface temperatures on treated sections averaged 5 degrees lower than adjacent untreated sections; attic air temperatures showed no consistent differences between houses. Electricity consumption varied widely with occupancy and air-conditioner settings. The team notes that lower surface temperatures may precede interior effects but did not detect them here. Based on these results, any claim about home energy savings would be premature, but the researchers can reasonably conclude that _______.

Which choice most logically completes the text?

Moss will cut summer electricity bills for most households.

Cooler roof surfaces cause residents to use air-conditioning less.

Applying moss to any roof type will cool the building interior.

the treatment was associated with lower roof-surface temperatures under the tested conditions.

Explanation

Only D is directly supported: treated roof sections were cooler than untreated sections under the study conditions. A and C overreach to unmeasured interior or universal effects, and B asserts a behavioral causal claim not established by the data.

6

While researching a topic, a student has taken the following notes:

  • Coral reefs support fisheries that feed millions and attract high-spending tourists.
  • Climate-driven bleaching events have increased in frequency and severity since 1998.
  • Local economies lose billions when reefs degrade, including from storm damage and tourism declines.
  • New coral 'gardening' techniques can regrow fragments on artificial structures within two years.
  • Success depends on reducing coastal pollution and protecting herbivorous fish populations.
  • Some reefs show natural resilience, recovering after heat waves when stressors are limited. Goal: Emphasize the economic consequences of reef decline.

The student wants to emphasize the economic consequences of reef decline. Which choice most effectively uses relevant information from the notes to accomplish this goal?

Reef decline brings immediate economic pain: local economies lose billions from storm damage and tourism declines, and fisheries that feed millions and draw high-spending visitors are jeopardized.

New coral gardening regrows fragments on artificial structures within two years, especially when coastal pollution is reduced and herbivorous fish populations are protected by careful managers in restoration projects.

Bleaching events have become more frequent and severe since 1998, yet some reefs recover after heat waves when other stressors are limited, indicating pockets of natural resilience.

Without reefs, coastal communities save money because beaches widen naturally and storm impacts lessen, offsetting any declines in tourism or fisheries over the long term, studies show.

Explanation

A ties billions in losses and risks to fisheries and tourism, directly addressing economics. B and C describe restoration or ecological trends; D asserts benefits contradicted by the notes.

7

An archaeologist examining early iron-smelting in West Africa proposes that the technology did not arrive as a single package from the north but instead emerged independently in several locales. The scholar points to the diversity of furnace designs across neighboring regions and argues that such variability is more consistent with local innovation than with the diffusion of a standard technique carried by migrants. In this view, similarities between West African and Saharan sites reflect convergent solutions to the same metallurgical challenges rather than direct transmission. The archaeologist acknowledges evidence of long-distance trade but maintains that the earliest smelting centers predate clear signs of large-scale migration into the area. If the claim is correct, strong evidence of imported expertise or imported ore should be absent from the oldest smelting layers.

Which finding, if true, would most directly weaken the scholar's claim?

Lead isotopic signatures of iron artifacts in the oldest West African smelting layers match Saharan ore sources, and burials of northern-trained smiths appear in the same strata.

Charcoal microresidues show simultaneous increases across multiple unconnected West African sites during the earliest smelting centuries.

Laboratory reconstructions demonstrate that iron can be smelted from local lateritic ores using simple clay furnaces and bellows.

A 12th-century chronicle from a nearby kingdom claims a king patronized foreign artisans to improve iron production.

Explanation

Choice A shows imported ore signatures and immigrant smiths in the earliest layers, directly contradicting independent local origins. B supports the claim, C only shows feasibility without diffusion evidence, and D is centuries later, so none weaken the claim.

8

An online store tested a price reduction in June to see whether selling more units could offset the lower price per item. The company argues that the cut increased monthly revenue; according to the table, _____ Use the data to evaluate the claim. No other promotions or channels changed during this period, according to the report.

Grayscale table (Times New Roman labels). Title: "Unit Price and Units Sold, May-June 2024". Columns: "Month", "Unit Price (USD)", "Units Sold". Rows: "May - $50 - 800"; "June - $45 - 1,000".

Which choice most effectively uses data from the table to complete the text?

the average price across May and June was $47.50

June units sold rose by 200 compared with May

even at $45 per item, selling 1,000 units yielded $45,000, exceeding May's $40,000 at $50 for 800 units

revenue decreased because the price per item dropped by $5

Explanation

May revenue was $50 x 800 = $40,000, while June revenue was $45 x 1,000 = $45,000. A and B are true but do not establish higher revenue, and D is contradicted by the calculations.

9

A historian contends that nineteenth-century urban parks were built primarily to improve workers' health, not to police their behavior or display civic grandeur. She cites reformers' worries about smoke-choked factories and crowded tenements, and notes that early park advocates emphasized 'fresh air and exercise' in public appeals. While acknowledging that parks often featured bandstands and promenades that encouraged orderly conduct, she argues these were secondary to the health mission. The timing, amid cholera outbreaks and rising tuberculosis deaths, suggests an urgent public health rationale. Critics counter that strict park rules and patrols reveal a social-control agenda. The historian replies that such rules were pragmatic tools for maintenance, not the parks' core purpose. The debate turns on whether park planners aimed first at healthy bodies or compliant citizens.

Which finding, if true, would most directly support the historian's claim?

Editorials from 1869 praise a city's new park as a monument to civic pride and artistic taste.

Early twentieth-century playground reformers stated that neighborhood parks were designed to reduce juvenile delinquency.

An 1871 city council resolution authorizing park funds states that the park's purpose is to provide clean air and exercise to reduce respiratory illness among factory workers.

Police records from the first year after a park opened show a 15 percent drop in disorderly conduct arrests.

Explanation

C directly states a health-first purpose aimed at workers, matching the claim. A is about civic pride (tangential), B is from the wrong timeframe, and D shows correlation with order but not the planners' intent.

10

Engineers tested twenty pairs of identical smartphones to study how storage temperature affects battery aging. In each pair, one phone was stored for eight weeks at a cool, controlled 15 degrees Celsius, and the other at a steady 30 degrees. All other conditions (charge level, usage cycles, and charging hardware) were held constant. Across all pairs, the cooler-stored phones lost less capacity than their warmer-stored counterparts, a pattern that repeated in three separate trials conducted months apart. The team also opened several batteries and found more degradation by-products in the warmer group, consistent with known heat-accelerated chemistry. Consequently, if two otherwise identical phones differ only in storage temperature, then, at the end of the storage period, _______.

Which choice most logically completes the text?

the cooler storage doubles a phone's usable life compared with warm storage

the phone stored in cooler conditions will retain a larger share of its original capacity than the one stored warm

phones that last longer in daily use are what cause owners to store them in cooler places

cool storage improves charging speed whether or not the battery is in use

Explanation

B follows because, with all else equal, the data show cooler storage slows capacity loss, so the cooler-stored phone retains more capacity. A asserts an unsupported magnitude, C reverses cause and effect, and D is a non sequitur about charging speed.

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