Expression of Ideas

The following passage describes historical migration patterns in the American Southwest. Which transition word most logically completes the blank in the text to signal a cause-and-effect relationship?

In planetary science, the core-accretion model posits that giant planets form by first accumulating a massive solid core, which then rapidly attracts surrounding hydrogen and helium gas. For planets forming far from their host stars, this gas is cold and dense, making it highly susceptible to rapid gravitational collapse onto the core. ________ the gas envelope is captured in a brief geological window rather than over tens of millions of years.

Which choice completes the text with the most logical transition?

Which transition word or phrase best shows the causal link between the sun's solar winds and the composition of the inner planets?

In the cold interstellar medium, gaseous carbon monoxide readily condenses onto cosmic dust grains, forming thick icy mantles. These icy layers act as cosmic catalysts, allowing hydrogen atoms to tunnel through activation barriers and react with the trapped carbon monoxide molecules. Complex organic molecules like methanol, __________, are synthesized in environments far too cold for traditional gas-phase chemistry to occur.

Which choice completes the text with the most logical transition?

The following passage describes a phenomenon in behavioral economics. Which transition word or phrase most logically completes the blank?

In behavioral economics, "choice overload" describes the psychological paralysis that occurs when consumers are presented with an excessive number of options. This abundance of choices can overwhelm a shopper's cognitive processing capacity. __________, individuals confronted with a vast selection often decide to walk away without making a purchase at all, or they select a product that fails to satisfy their actual needs.

Which choice completes the text with the most logical transition?

The following passage is from an academic text about language development. Complete the passage by typing the transition word or phrase that most logically completes the blank.

Read the passage below. Fill in the blank with the transition word or phrase that most logically connects the ideas.

In modern urban design, dark asphalt pavements absorb a high percentage of incoming solar radiation, a phenomenon that significantly elevates surrounding air temperatures in metropolitan areas. ________, municipal planners are now increasingly coating public roads with light-colored reflective sealants to lower surface temperatures and help mitigate the intense urban heat island effect in vulnerable neighborhoods.

Which choice completes the text with the most logical transition?

In historical linguistics, the laryngeal theory proposed by Ferdinand de Saussure in 1878 predicted the existence of certain consonant sounds in Proto-Indo-European that had vanished in all known daughter languages. When Hittite cuneiform tablets were deciphered in the early twentieth century, scholars discovered a written language that retained these exact predicted consonants. The decipherment of Hittite, ________, provided direct empirical confirmation of Saussure's hypothetical structures, vindicating his reconstructed model decades after its publication.

Which choice completes the text with the most logical transition?

For centuries, most astronomers adhered to the geocentric model, which posited that Earth sat stationary at the center of the universe while all other celestial bodies revolved around it. This view was widely accepted because it aligned with daily observations of the Sun rising and setting. _______, in 1543, Nicolaus Copernicus published a groundbreaking mathematical model showing that Earth and the other planets actually revolve around the Sun, challenging the long-held geocentric consensus.

Which choice completes the text with the most logical transition?

In many tropical ecosystems, certain species of paper wasps construct their nests in close proximity to highly aggressive dolichoderine ant colonies, utilizing the ants' territorial behavior as a shield against larger predators. ________ the wasps must synthesize chemical compounds that mimic the host colony's cuticular hydrocarbons to prevent these indiscriminate predators from attacking them.

Which choice completes the text with the most logical transition?

In the seventeenth century, René Descartes championed rationalism, arguing that true knowledge could only be derived through reason and intellectual intuition rather than sensory experience. This deductive approach sought to establish absolute certainty by rebuilding philosophy from undeniable foundational truths. ______ Descartes did not entirely discount the physical world; he performed numerous anatomical dissections and optical experiments, recognizing that empirical observation was necessary to determine which of his rational theories actually matched physical reality.

Which choice completes the text with the most logical transition?

Many seventeenth-century European cartographers depicted California as an island, relying on incomplete records from Spanish explorers who sailed only as far as the Gulf of California. ________, subsequent overland expeditions led by Jesuit missionary Eusebio Kino in 1701 proved that California was actually a peninsula connected to the North American mainland.

Which choice completes the text with the most logical transition?

In forest ecosystems, mycorrhizal fungi form symbiotic networks that connect the roots of different trees, allowing them to share nutrients and chemical warning signals. When a tree is attacked by pests, it can transmit warning compounds through these subterranean pathways. _______ neighboring trees receive these signals in advance and synthesize defensive chemicals to ward off the impending threat.

Which choice completes the passage with the most logical transition?

In 1922, British archaeologist Howard Carter successfully located the sealed entrance to King Tutankhamun’s tomb in Egypt's Valley of the Kings, ending a years-long search. ________, Carter and his team spent several weeks carefully clearing the debris-filled corridor that led to the main burial chambers, ensuring that every artifact was documented and left undamaged during the excavation process.

Which choice completes the text with the most logical transition?

The following passage is adapted from a sociological discussion on group dynamics. Complete the passage by typing the transition word or phrase that most logically connects the ideas.

Plants in a forest are connected by underground networks of mycorrhizal fungi, which allow them to share nutrients and water. When a tree is attacked by pests, it transmits warning chemical signals through these fungal pathways to neighboring trees. ________, the receiving trees quickly synthesize defensive chemicals to protect themselves before the pests arrive.

Which choice completes the passage with the most logical transition?

In 1912, geophysicist Alfred Wegener proposed the theory of continental drift, suggesting that Earth's continents were once joined in a single supercontinent. For decades, Wegener's hypothesis was widely dismissed by the scientific community due to the lack of a known physical mechanism that could move landmasses. ______ in the 1950s and 1960s, the discovery of seafloor spreading provided the geological evidence required to validate his ideas, paving the way for the acceptance of plate tectonics.

Which choice completes the passage with the most logical transition?

The following sentences describe the historical development of penicillin. Arrange them in the correct chronological sequence by ordering the items from first to last.