CUET UG English Booster Test 2-Geological History

The chapter establishes that 650 million years ago, a giant amalgamated southern supercontinent named Gondwana did indeed exist, centering around present-day Antarctica. This ancient landmass contained several modern land fragments, including India and Antarctica, which makes Assertion (A) true. However, the text notes that after thriving for 500 million years, the landmass was forced to separate into countries, changing the surface map of the globe. Gondwana does not exist today as it did in the past, which makes Reason (R) false.

The adjective "amalgamated" comes from the verb amalgamate, which means to bring multiple distinct parts together to form a unified entity. In the context of ancient geography, it refers to how independent tectonic blocks were locked together to build the supercontinent Gondwana. Substituting "Combined" into the phrase preserves the exact meaning of a unified southern landmass, validating Option D.

The provided passage states that traveling to Antarctica and exploring its history allows visitors "to get a grasp of where we've come from and where we could possibly be heading." This shows that looking at deep geological time does not just tell us about the past; it also helps us predict future environmental outcomes, confirming Option A.

The final sentence of the provided passage states: "When you think about all that can happen in a million years, it can get pretty mind-boggling." The massive scale of geological events—such as moving continents and changing climates—stands in sharp contrast to the short timeline of human history, overwhelming the observer's mind. This confirms Option C.

The text notes that during the Gondwana era, things were completely different from modern Antarctica: "the climate was much warmer, hosting a huge variety of flora and fauna." If the continent had stayed in this ancient state rather than drifting to the South Pole, it would host warmer conditions and flora (Option C). The modern icy, frozen landscape is a direct result of continental drift and the opening of the Drake Passage.

The text states that during the era of Gondwana, "humans hadn't arrived on the global scene." Human civilizations did not develop until much later, about 12,000 years ago, millions of years after Gondwana split apart. Therefore, Option B is factually false, making it the correct choice for a statement that is NOT true.

In deep-time history and evolutionary biology, phrases like "arriving on the scene" are used as metaphors to mark when a species first evolves and joins the planet's ecosystem. The author is emphasizing that humans did not exist during the Gondwana era. It is an evolutionary milestone rather than a literal travel description, confirming Option A.

The text states: "For 500 million years Gondwana thrived, but around the time when the dinosaurs were wiped out... the landmass was forced to separate." The verb "thrived" means to grow vigorously, bloom, or flourish. This vocabulary choice accurately captures how plants and animals filled the warm environment of the supercontinent, confirming Option A.

The text provides a clear historical framework for these changes: First, the giant supercontinent Gondwana thrives for 500 million years under warm conditions (2). Next, a massive biological shift occurs as the extinction of dinosaurs takes place (4). At this same time, tectonic plate shifts accelerate, and the unified landmass is forced to separate into distinct pieces (3). This long process of drift and separation leads directly to the formation of the globe as we know it today (1). This cause-and-effect chain yields the sequence 2, 4, 3, 1, matching Option D.

When the text states that the landmass was "forced to separate into countries," it is speaking in broad terms about the creation of the modern world map. Tectonic plates do not create political governments or laws; they move large pieces of rock across the ocean. Therefore, the word refers to the creation of distinct continental landmasses (like India, South America, and Australia) that would later hold human nations, confirming Option B.

Evaluating both statements shows: Assertion (A) is true because the separation of the supercontinent happened alongside a massive transformation in global wildlife. Reason (R) is true because the text explicitly pairs these events: "...around the time when the dinosaurs were wiped out and the age of the mammals got under way, the landmass was forced to separate..." Since the loss of dinosaurs and rise of mammals (R) is the exact biological shift mentioned in the assertion (A), statement R serves as the correct explanation, validating Option C.

The noun "emergence" means the process of coming into view, developing, or arriving on the scene. In the text, it describes how mammals stepped forward to dominate the planet after the dinosaurs were wiped out. The question asks for an antonym. "Disappearance" (Option D) means vanishing, fading from view, or going extinct, making it the perfect opposite.

Let us link each geological cause from List 1 to its direct environmental effect in List 2: India drifting north $\rightarrow$ Collision with the Asian continental plate $\rightarrow$ Buckles crust to form Himalayas (1-c). S. America joining N. America $\rightarrow$ The breaking away of the southern tip $\rightarrow$ Opens Drake Passage (2-d). Landmass separation $\rightarrow$ The splitting of the ancient supercontinent $\rightarrow$ Shapes present-day globe (3-a). Cold current $\rightarrow$ The circumpolar water loop $\rightarrow$ Keeps Antarctica frigid (4-b). This layout results in the combination 1-c, 2-d, 3-a, 4-b, confirming Option D.

The text notes that ancient Gondwana was "centred roughly around the present-day Antarctica." After the supercontinent split apart, Antarctica stayed at the bottom of the world, becoming frozen and isolated in the far south. It never moved into the Northern Hemisphere. Therefore, Option B is factually false, making it the correct answer for a statement that is NOT true.

The text describes the geological impact of India's movement: "Imagine: India pushing northwards, jamming against Asia to buckle its crust and form the Himalayas..." The word buckle means to bend, crumple, or fold under heavy pressure, which describes how mountain ranges are built when continental plates collide. This confirms Option A.

The text connects the creation of the Himalayas directly to India's tectonic path: "...India pushing northwards, jamming against Asia to buckle its crust and form the Himalayas..." If this movement had never happened, the structural pressure needed to fold the Earth's crust would be missing, meaning the Himalayas would likely not have formed (Option C).

Evaluating both statements shows: Assertion (A) is false because the creation of the Drake Passage had nothing to do with India's journey north. They were two separate tectonic events happening in different parts of the world. Reason (R) is true because the text confirms that the water passage opened up as "South America drifted off to join North America." Since A is false but R is true, Option D is the correct choice.

The adjective "frigid" means intensely cold. In the chapter, it describes the circular ocean current that surrounds Antarctica, trapping cold temperatures and keeping the continent frozen. Replacing the word with Freezing (Option C) preserves the author's description of a cold polar environment.

In geology, a shield is a large, stable area of ancient rock that forms the core foundation of a continental plate. The text points to "pre-Cambrian granite shields" as key features that help us study the history of the Earth. It refers to an ancient rock foundation rather than a weapon or an ice sheet, confirming Option A.

The text details the scientific lessons waiting for visitors on the ice sheet: "It's to understand the significance of Cordilleran folds and pre-Cambrian granite shields..." These folds are long chains of mountain ridges formed by ancient plate movements, and the author explicitly names them using this term, confirming Option B.