All practice questions

Passage A
For over a century, architectural historians analyzing the monumental stone structures of the ancient Andean Chavín culture—most notably the temple complex at Chavín de Huántar—focused almost exclusively on visual iconography and spatial alignment. Traditional scholarship posited that the complex network of subterranean galleries was engineered primarily for utilitarian drainage during seasonal torrents and to structural withstand seismic activity. Early researchers noted the unusual reverberations and echoing acoustic phenomena within the narrow granite corridors, but these sound effects were routinely dismissed as epiphenomena—unintended byproducts of heavy stone construction and narrow spatial geometry. According to this traditional view, the prestige and authority of the Chavín priesthood derived entirely from visual pageantry, solar alignments, and decorative stone relief carvings depicting sacred felines and raptors.

Passage B
Recent interdisciplinary field studies combining architectural modeling with acoustic engineering have challenged the long-held assumption that ancient subterranean spaces were acoustically inert or accidentally resonant. Researchers utilizing binaural acoustic testing within the underground galleries of Chavín de Huántar discovered that the labyrinthine passages filter and amplify specific sound frequencies, particularly those between 100 Hz and 120 Hz—the natural resonance zone of the human male voice. Furthermore, marine shell trumpets (*strombus* strombid pututu) excavated from the central ceremonial plaza were acoustically tuned to produce fundamental frequencies that trigger acoustic standing waves inside the interior galleries. Rather than serving merely as drainage conduits, the hydraulic channels were intentionally shaped with acoustic resonant cavities that created disorienting, low-frequency hums when water flowed during ceremonies. These findings suggest that auditory manipulation was an intentional, primary design objective essential to creating immersive ritual experiences.

Which of the following best describes how the acoustic evidence presented in Passage B modifies the traditional understanding of Chavín architecture described in Passage A?

A regular hexagon $ABCDEF$ has a perpendicular distance of $12\sqrt{3}$ inches between its two parallel opposite sides. What is the perimeter, in inches, of hexagon $ABCDEF$?

Soil ecologists evaluated nitrogen mineralization by measuring nitrate production rates (in $\text{mg/kg/day}$) across 4 depth zones in two distinct forest management plots (Plot X and Plot Y). The results are summarized in Table 1 below.

Based on Table 1, if a composite sample is created using equal masses of soil from all 4 depth zones (0–40 cm), by how much does the average nitrate production rate of Plot Y exceed the average nitrate production rate of Plot X?

The following passage is adapted from an essay on early modern scientific history:

In June 1699, fifty-two-year-old naturalist and scientific illustrator Maria Sibylla Merian set sail from Amsterdam for Suriname, a Dutch territory in South America. Accompanied by her younger daughter, Dorothea Maria, Merian undertook a self-funded voyage financed through the sale of her personal artwork and collected specimens. Unlike traditional naturalists of the late seventeenth century, who relied almost exclusively on dried specimens shipped to European collectors, Merian sought to observe living insects directly in their natural tropical habitats. During her two-year residence in Paramaribo, she meticulously documented the metamorphosis of dozens of insect species, recording host plants, larval growth stages, and behavioral dynamics previously unknown to European scholars. She published her findings in 1705 in the masterwork Metamorphosis Insectorum Surinamensium. To transport delicate caterpillar pupae safely during her fieldwork in the jungle, Merian housed them in small wooden boxes ventilated with fine brass mesh, rejecting the common practice of preserving specimens in spirits of wine, which she observed rendered insect bodies translucent and stripped away their natural pigmentation.

According to the passage, Merian safely transported delicate caterpillar pupae during her fieldwork by doing which of the following?

A telecommunications company connects two remote cell towers, Tower X and Tower Y, to a central relay station R. The cable path from Relay Station R to Tower X is $7$ kilometers long, and the cable path from Relay Station R to Tower Y is $8$ kilometers long. The angle formed between the two cables at Relay Station R, $\angle XRY$, measures $120^\circ$. A straight wireless backup link is established directly between Tower X and Tower Y. What is the distance, in kilometers, of this direct wireless link?

A student constructs a respirometer apparatus to measure the rate of cellular respiration ($O_2$ consumption) in germinating seeds. Match each component of the apparatus to its primary experimental function in the setup.

Researchers conducted two experiments to investigate the enzymatic activity of cellobiase, an enzyme that hydrolyzes cellobiose into glucose.

*Experiment 1*
Reaction mixtures were prepared using a fixed cellobiase concentration of $0.5\ \text{mg/mL}$ and varying initial cellobiose concentrations ($1.0\ \text{mM}$, $2.5\ \text{mM}$, $5.0\ \text{mM}$, and $10.0\ \text{mM}$). All mixtures were incubated at $37^\circ\text{C}$ and $\text{pH}\ 5.0$. The initial rate of glucose production ($v_0$) was measured for each mixture.

*Experiment 2*
Reaction mixtures were prepared using a constant cellobiose concentration of $5.0\ \text{mM}$ and a constant cellobiase concentration of $0.5\ \text{mg/mL}$. The mixtures were incubated at $\text{pH}\ 5.0$ under four different temperatures ($25^\circ\text{C}$, $37^\circ\text{C}$, $50^\circ\text{C}$, and $65^\circ\text{C}$). The initial rate of glucose production ($v_0$) was measured for each mixture.

Based on the descriptions of both experiments, which variable served as the independent variable in Experiment 1 but was maintained as a controlled variable in Experiment 2?

The materials scientist noted that the newly developed ceramic compound was remarkably impervious for extreme heat and chemical corrosion, making it an ideal candidate for spacecraft heat shields.

Which of the following choices produces a grammatically correct and idiomatically standard sentence?

A garden bed is designed in the shape of a sector of a circle with a central angle measuring $120^\circ$. If the total perimeter of the sector-shaped garden bed is $24 + 8\pi$ feet, what is the area of the garden bed, in square feet?

A vertical flagpole stands perpendicular to level ground. Two support cables are attached from the top of the flagpole to ground anchors located on opposite sides of the pole. The first cable makes a $60^\circ$ angle with the ground and its ground anchor is $10\sqrt{3}$ feet from the base of the pole. The second cable makes a $45^\circ$ angle with the ground. What is the sum of the lengths, in feet, of the two support cables?

In rectangle $ABCD$, diagonals $AC$ and $BD$ intersect at point $E$. If the measure of $\angle AEB$ is $120^\circ$ and $AC = 16$, what is the length of side $BC$?

A rhombus has a perimeter of 40 centimeters and one diagonal of length 12 centimeters. What is the area, in square centimeters, of the rhombus?

While conducting fieldwork in the remote alpine valley, the glaciologist recorded data on the swift, erratic movements of the melting glacier, and she promptly transmitted the findings to her research team.

Which choice produces the most grammatically correct sentence?

After calibrating the sensors in the clean room, the materials scientist synthesized several durable, flexible synthetic polymers, and she published the findings in a peer-reviewed journal.

Which choice provides the correct punctuation for the underlined portion?

A team of microbiologists investigated the impact of synthetic micro-plastic additives ($P_1$ and $P_2$) on the rate of nitrogen fixation by *Rhizobium* bacteria in soil culture vessels. Four identical culture vessels were prepared and incubated at $22^\circ\text{C}$ with $15\%$ baseline soil moisture for 14 days under the following conditions:

- Vessel 1: Standard nutrient medium + live *Rhizobium* bacteria (no plastic additives)
- Vessel 2: Standard nutrient medium + sterile (non-viable) *Rhizobium* bacteria + additive $P_1$
- Vessel 3: Standard nutrient medium + live *Rhizobium* bacteria + additive $P_1$
- Vessel 4: Standard nutrient medium + live *Rhizobium* bacteria + additive $P_2$

Match each experimental vessel on the left with its intended role in establishing control conditions or testing experimental variables on the right.

Ethnomusicologists studying traditional Javanese gamelan music often analyze the unique slendro tuning system. Unlike the Western twelve-tone equal temperament scale, slendro divides the octave into five roughly equidistant intervals, no two gamelan ensembles are tuned to the exact same pitch frequencies. Consequently, each ensemble possesses a distinct sonic identity that cannot be easily replicated.

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

Scientists conducted an experiment to evaluate how hydroxyl radicals ($\text{OH}$) and ultraviolet ($\text{UV}$) light interact to break down atmospheric methane ($\text{CH}_4$). Four identical gas-tight reaction vessels were maintained at $25^\circ\text{C}$ with an initial concentration of $2.0\text{ ppm}$ $\text{CH}_4$. Each vessel was subjected to different conditions of $\text{OH}$ radical presence and $\text{UV}$ light intensity for a duration of 12 hours:

After 12 hours, the remaining concentration of $\text{CH}_4$ was recorded for each vessel.

To determine the specific effect of increasing $\text{UV}$ light intensity on the degradation rate of $\text{CH}_4$ in the presence of $\text{OH}$ radicals, which vessel serves as the control group?

Consider the following passage from an article on architectural conservation:

Conservators restoring medieval stained glass windows must carefully document every crack before disassembly. Lead cames deteriorate over centuries, they no longer support the heavy glass panels safely. Craftsmen must therefore re-lead the structural framework while preserving the original artistic layout.

Which of the following choices produces a grammatically correct sentence that fixes the underlined portion?

Read the passage below:

In 2022, conservator Dr. Maya Lin undertook the restoration of the 14th-century Tapestry of Saints at the Florence Institute of Art. Before applying any chemical cleansers to the fragile silk threads in November of that year, she reviewed the logbooks from the tapestry's previous restoration in 1954. Those archival notes revealed that in 1938—sixteen years before the 1954 restoration team consolidated the backing canvas—the tapestry had been emergency-treated with an acoustic ultrasonic bath by museum curator Pietro Bernini following a river flood. However, Lin's micro-chemical analysis in early 2023 indicated that the ultrasonic bath had actually occurred after Bernini documented the initial mold outbreak in the winter of 1937, though prior to the tapestry's relocation to the dry vault in autumn 1939. Lin finalized her comprehensive structural report in mid-2024, citing Bernini's 1937 mold documentation as the true turning point in the artifact's degradation history.

Based on the passage, in what chronological order did the events surrounding the tapestry occur, from earliest to latest?

Read the passage below:

In October 1947, oceanographer Maurice Ewing led a scientific expedition aboard the research vessel Atlantis to investigate the geological structure of the Mid-Atlantic Ridge. Utilizing seismic refraction techniques—a methodology measuring the propagation speed of sound waves through subsurface rock layers—Ewing's team recorded acoustic data across vast stretches of the Atlantic Ocean floor. The resulting data revealed two unexpected physical findings. First, the sediment layer resting atop the oceanic basement rock was surprisingly sparse, measuring under one thousand feet deep in most survey sites rather than the multi-mile depth predicted by contemporary oceanographic models. Second, the underlying basaltic oceanic crust was extraordinarily thin, averaging approximately five kilometers in thickness compared to the thirty-to-forty-kilometer thickness characteristic of continental landmasses. Furthermore, rock cores retrieved directly from the central rift valley yielded fresh basalt completely devoid of accumulated sediment encrustations, providing direct physical evidence that the seafloor along the central ridge crest was geologically young.

Based on the passage, evaluate the following statement:
Seismic refraction measurements recorded during the 1947 Atlantis expedition demonstrated that the basaltic oceanic crust was thicker than the Earth's continental crust.