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SAT Reading & Writing: Hard Rhetorical Synthesis (Drill 21)

Drill 21 · Reading & Writing · Hard Rhetorical Synthesis

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About This Drill

SAT Reading & Writing: Hard Rhetorical Synthesis (Drill 21) is a Reading & Writing practice drill covering Hard Rhetorical Synthesis. It contains 5 original questions created by Brian Stewart, a Barron's test prep author with over 20 years of tutoring experience.

Hard Rhetorical Synthesis questions present a set of research notes and a specific writing goal, then ask you to choose the sentence that best accomplishes that goal using only the notes. The wrong answers are usually accurate statements that serve a different purpose than the one asked for, or that subtly misstate the notes. Match the rhetorical task exactly.

Questions & Explanations

Notes
While researching a topic, a student has taken the following notes: • An owl's flight feathers carry three structures absent from most birds: a comb of stiff bristles on the leading edge, a soft fringe on the trailing edge, and a velvety upper surface. • The leading-edge comb is formed by the curved, free-standing tips of barbs on the outermost flight feather, which directly meets the oncoming air. • Researchers propose that the comb breaks up and redirects the airflow passing over the wing, reducing the broadband hiss that a smooth wing would create. • The fringe and velvet are thought to further damp the noise of air moving across and behind the feather surface. • Nocturnal owls that hunt by ear have far more developed combs than owls active in daylight, though the exact contribution of each structure is still studied.

Question 1. The student wants to explain to the class how an owl's wing structures work together to quiet its flight. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  • A) The leading-edge comb on an owl's outermost flight feather is built from the curved, free-standing barb tips that meet the oncoming air directly, a structure far more developed in owls that hunt at night than in those active by day.
  • B) Owls that hunt in the dark have markedly more developed leading-edge combs than owls that are active during the day.
  • C) The comb breaks up and redirects the passing air; the fringe and velvety surface damp the sound that remains, so the wing moves with little of a smooth wing's hiss. ✓
  • D) An owl's flight feathers differ from those of most other birds in carrying a comb, a fringe, and a soft upper surface.

Explanation: Choice C is the best answer. The sentence ties the three structures to their separate quieting roles and states the combined result, the explanation of how they work together that the task calls for. Choice A describes the comb in detail and adds the nocturnal contrast, but covers one structure rather than how the three combine to quiet the wing. Choice B reports the contrast between nocturnal and diurnal combs, a true detail that explains nothing about the mechanism. Choice D lists the three structures but stops short of saying what any of them does to the air or the noise.

Notes
While researching a topic, a student has taken the following notes: • Kintsugi is the Japanese practice of mending a broken ceramic by joining the pieces with lacquer and dusting the seams with powdered gold. • Rather than disguising the breakage, the gold deliberately highlights every crack, tracing the object's history in bright lines. • The repaired bowl can be valued not despite its fractures but because the repair makes them part of the object's visible history. • The practice is often linked to an aesthetic that finds beauty in imperfection and impermanence. • A single repair can take weeks, because each lacquer layer must cure fully in a humid environment before the next is applied.

Question 2. The student wants to convey why kintsugi is significant beyond simply fixing a bowl. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  • A) Kintsugi treats a break as part of an object's worth, mending it so the gold seams display the damage rather than hide it, which turns repair into a statement about valuing imperfection. ✓
  • B) In kintsugi, the broken pieces of a ceramic are rejoined with lacquer dusted in powdered gold, each layer cured fully in humid air before the next, a process that can stretch across several weeks.
  • C) The bright gold lines of a kintsugi repair trace every crack across the surface of the mended bowl.
  • D) Kintsugi is associated with an aesthetic sensibility that locates beauty in things that are imperfect and impermanent.

Explanation: Choice A is the best answer. The sentence captures the significance, that the gilded repair reframes damage as value, which is the larger meaning the goal is after. Choice B details the method and the time it takes, accurate but silent on why the practice matters. Choice C points to what the gold seams look like, a visual fact rather than a statement of significance. Choice D names the aesthetic loosely without connecting it to what kintsugi actually does to a broken bowl.

Notes
While researching a topic, a student has taken the following notes: • A firefly's light comes from a specialized organ on the underside of its abdomen, packed with cells called photocytes. • Inside these cells, an enzyme acts on a compound called luciferin in the presence of oxygen, releasing energy almost entirely as light rather than heat. • Because so little of the energy is lost as warmth, the glow is often described as "cold light." • The insect controls the timing of its flashes by regulating the oxygen that reaches the reaction, switching the light on and off. • The exact color, from yellow-green to orange, varies among species and is set partly by the surrounding chemistry of the organ.

Question 3. The student wants to define what a firefly's light organ is for an audience unfamiliar with the term. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  • A) A firefly switches its flashes on and off by controlling how much oxygen reaches the light-making reaction inside the organ, which is how it produces a rhythm of pulses rather than a steady glow.
  • B) Because almost none of the energy escapes as warmth, the light a firefly's organ makes is commonly called "cold light."
  • C) The color of the light, anywhere from yellow-green to orange, differs from one firefly species to the next.
  • D) A firefly's light organ is a region on the underside of its abdomen, filled with cells in which an enzyme acts on luciferin to produce light. ✓

Explanation: Choice D is the best answer. The sentence states what the organ is and where it sits, then names the reaction it houses, the definition the task asks for. Choice A describes in detail how the firefly controls its flashing, a function of the organ rather than a statement of what it is. Choice B explains why the glow is called cold light, a property of the light and not a definition of the organ. Choice C notes how color varies by species, a detail that defines neither the organ nor its parts.

Notes
While researching a topic, a student has taken the following notes: • Charcoal is made by heating wood with very little air, driving off water and gases and leaving behind a fuel that is almost pure carbon. • Before coal came into wide use, charcoal was the fuel that let smiths and smelters reach the high temperatures needed to work metal. • Traditional production used earth-covered mounds, called clamps, or sealed kilns, in which a slow, smoldering burn was carefully controlled to avoid letting the wood burst into open flame. • Charcoal burns hotter and cleaner than raw wood and weighs far less, making it easier to carry to a forge. • The charcoal trade once consumed vast quantities of timber, and whole woodlands were managed in cycles to keep the supply steady.

Question 4. The student wants to situate charcoal-making within the history of metalworking before coal. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  • A) Charcoal results from heating wood with little air, which drives off moisture and gases and leaves a fuel that is nearly pure carbon, burning hotter and cleaner than raw wood.
  • B) Before coal was widely adopted, charcoal was the fuel that let smiths and smelters reach the temperatures that working metal demanded, placing its production at the heart of early metal industry. ✓
  • C) Charcoal weighs considerably less than untreated wood, so it was easier to haul to a distant forge.
  • D) Producing charcoal traditionally relied on earth-covered mounds known as clamps or on sealed kilns that contained a slow, smoldering burn.

Explanation: Choice B is the best answer. The sentence places charcoal in its historical role as the fuel that made pre-coal metalworking possible, situating it in history as the goal directs. Choice A explains how charcoal forms and how it burns, process detail with no reference to metalworking history. Choice C notes charcoal's lighter weight, a practical point not tied to its place in the metal trade. Choice D covers the clamps and kilns of production, accurate yet silent on why charcoal mattered historically.

Notes
While researching a topic, a student has taken the following notes: • Both woad and true indigo yield the same blue dye compound, called indigotin, which binds to cloth only after a chemical bath strips and then restores its color in air. • Woad comes from a European plant, Isatis tinctoria, long cultivated across the continent before sea trade with Asia expanded. • True indigo comes from plants of the genus Indigofera, grown mainly in warmer regions of Asia and the Americas. • True indigo leaves contain a far higher concentration of the dye compound than woad leaves, so they produce deeper, more economical color. • When cheaper Asian indigo began reaching Europe, some woad-growing regions lobbied for laws restricting the import to protect their trade.

Question 5. The student wants to convey the practical difference that made true indigo a more economical dye source than woad. Which choice most effectively uses relevant information from the notes to accomplish this goal?

  • A) Both woad and true indigo deliver the same blue compound, indigotin, which fixes to cloth only after a bath removes and then restores its color in air.
  • B) When less expensive indigo from Asia began arriving in Europe, certain woad-producing regions pushed for laws to limit the imports.
  • C) True indigo's leaves hold a much higher concentration of the dye compound than woad's, so the same effort yields deeper and more economical color. ✓
  • D) Woad is drawn from Isatis tinctoria, a European plant, while true indigo comes from plants of the genus Indigofera grown in warmer regions.

Explanation: Choice C is the best answer. The sentence names the practical difference the goal asks for, true indigo's far greater dye concentration, which is what made it the cheaper, more economical source. Choice A stresses what the two share, the same compound and bath chemistry, rather than any difference between them. Choice B recounts the trade dispute the price gap caused, a consequence rather than the difference in economy itself. Choice D gives a real difference of plant and region, but not the practical, economic one the goal specifies.