NCERT Class 11 Geography — Chapter 3: Distribution of Oceans and Continents

The western boundary of the Indian Plate roughly aligns with which mountain range?

Which major tectonic plate comprises the North American continent and the western Atlantic ocean floor?

With reference to the rates of plate movement, consider the following statements: 1. The Arctic Ridge has the fastest rate of movement. 2. The rates of plate movement vary across the globe. 3. The East Pacific Rise has the slowest rate of movement. Which of the statements given above is/are correct?

A "Subduction Zone" is a characteristic feature of which type of plate boundary?

What are the primary sources of the Earth's internal heat?

In the context of plate tectonics, the Pacific Plate is predominantly classified as which type of plate?

The minor tectonic plate known as the "Caroline Plate" is situated:

The "Polar-fleeing force" is linked to which aspect of the Earth's shape and motion?

Who proposed the mechanism where the ocean floor spreads from ridges and subducts at trenches?

With reference to the magnetic properties of ocean floor rocks, consider the following statements: 1. Rocks closer to the mid-oceanic ridges have reverse polarity. 2. Rocks equidistant from the mid-oceanic ridge crest have similar magnetic polarities. 3. The magnetic stripes on the ocean floor provided evidence against Sea Floor Spreading. Which of the statements given above is/are correct?

According to paleomagnetic data, the Indian subcontinent was located at which latitude approximately 140 million years ago?

The source of the gold placer deposits found in Ghana is located in which region?

What is the term for the sedimentary rock formed from glacial deposits, characteristic of the Gondwana system?

The Mid-Atlantic Ridge represents which type of tectonic plate boundary?

The age of the earliest marine deposits found along the opposing coastlines of South America and Africa is:

The boundary of the Indian Plate along the Makrana coast connects to the spreading centre of the:

With reference to the Continental Drift Theory, consider the following statements: 1. It was first proposed as a comprehensive argument by Abraham Ortelius in 1596. 2. The supercontinent Pangaea began to split around 200 million years ago. 3. The northern component of the split landmass was named Laurasia. Which of the statements given above is/are correct?

The "Pole-fleeing force" proposed in the Continental Drift Theory is attributed to:

With reference to the mapping of the ocean floor, consider the following statements: 1. The ocean floor contains vast plains known as abyssal plains. 2. Mid-oceanic ridges are the least active areas in terms of volcanic eruptions. 3. Rocks of the oceanic crust are much younger than the continental rocks. Which of the statements given above is/are correct?

Who utilized computer mapping to demonstrate the "best fit" of the Atlantic continental margins?

According to Alfred Wegener, which of the following forces were responsible for the drifting of continents? 1. Convection currents in the mantle 2. Pole-fleeing force 3. Gravitational pull of Jupiter Which of the statements given above is/are correct?

Who propounded the hypothesis of "Sea Floor Spreading"?

Consider the following statements regarding the "Convection Current Theory": 1. It was proposed by Alfred Wegener in the 1930s. 2. It suggests currents are generated due to radioactive elements causing thermal differences in the mantle. 3. It argues that these currents operate in the entire mantle. Which of the statements given above is/are correct?

Consider the following statements regarding Plate Boundaries: 1. Divergent boundaries are sites where crust is destroyed. 2. Convergent boundaries are where the crust is destroyed. 3. Transform boundaries are where the crust is neither produced nor destroyed. Which of the statements given above is/are correct?

Consider the following statements regarding the evidence for Sea Floor Spreading: 1. Rocks equidistant on either side of the crest of mid-oceanic ridges show remarkable similarities in magnetic properties. 2. The age of rocks decreases as one moves away from the crest of the mid-oceanic ridge. 3. The deep trenches have deep-seated earthquake occurrences. Which of the statements given above is/are correct?

Consider the following statements about the "Ring of Fire": 1. It coincides with the mid-oceanic ridges. 2. It is characterized by deep-seated earthquakes. 3. It is located along the rim of the Pacific Ocean. Which of the statements given above is/are correct?

Which of the following was NOT cited by Alfred Wegener as evidence for the Continental Drift Theory?

Consider the following statements regarding the thickness of the lithosphere: 1. It varies between 5 and 100 km in oceanic parts. 2. It is about 10 km in the continental areas. 3. The lithosphere includes the crust and the top solid part of the mantle. Which of the statements given above is/are correct?

Consider the following statements regarding Transform Faults: 1. They are generally parallel to the mid-oceanic ridges. 2. Along these faults, crust is neither produced nor destroyed. 3. They are caused by the differential movement of plate portions. Which of the statements given above is/are correct?

In the Continental Drift Theory, the term "Panthalassa" refers to:

The "Jig-Saw-Fit" evidence for continental drift is most apparent between which two continents?

Consider the following statements regarding the sediments on the ocean floor: 1. Scientists expected the sediment column to be very thick if ocean floors were old. 2. Sediment columns were found to be older than 2000 million years. 3. The sediments on the ocean floor are unexpectedly very thick. Which of the statements given above is/are correct?

Consider the following statements about the "Tidal Force" suggested by Wegener: 1. It is due to the attraction of the moon and the sun. 2. It suppresses tides in oceanic waters. 3. Most scholars considered this force to be inadequate for drifting continents. Which of the statements given above is/are correct?

The "Continental Margin" includes which of the following? 1. Continental Shelf 2. Continental Slope 3. Continental Rise 4. Deep-oceanic Trenches Which of the statements given above is/are correct?

The 2,000-million-year-old rock belt along the coast of Brazil correlates with similar formations in:

The "Mid-Oceanic Ridges" are characterized by: 1. A smooth dome at the crest. 2. A fractionated plateau. 3. A flank zone all along its length. Which of the statements given above is/are correct?

Which feature is NOT characteristic of Mid-Oceanic Ridges?

Consider the following statements regarding the "Gondwana system of sediments": 1. It has thick lava flows at the base indicating volcanic activity. 2. It is known to have counterparts in six different landmasses of the Southern Hemisphere. 3. It provides no evidence of palaeoclimates. Which of the statements given above is/are correct?

Consider the following statements regarding the "Convection Cell" or "Convective Flow": 1. Heated material rises to the surface, spreads, cools, and sinks back. 2. This cycle occurs only once and stops. 3. It was first considered by Arthur Holmes in the 1930s. Which of the statements given above is/are correct?

Consider the following statements regarding the "Eurasian Plate": 1. It is largely an oceanic plate. 2. It includes the adjacent oceanic plate. 3. It is one of the seven major plates. Which of the statements given above is/are correct?

In the context of plate tectonics, the Java Trench marks which boundary of the Indian Plate?

Which ancient ocean separated the Indian plate from the Eurasian plate?

Which seismic characteristic is associated with the Alpine-Himalayan belt?

Consider the following pairs regarding the evidence in support of Continental Drift: | Evidence | Description 1. | Tillite | Sedimentary rock formed out of deposits of glaciers 2. | Placer Deposits | Occurrence of gold deposits in Ghana without source rock 3. | Lemuria | A contiguous landmass linking India, Madagascar, and Africa 4. | Mesosaurus | Small reptile adapted to deep ocean waters How many of the pairs given above are correctly matched?

Which of the following pairs is correctly matched regarding the location of fossils?

Match List I with List II and select the correct answer using the code given below: List I | List II A. Cocos plate | 1. Between Central America and Pacific plate B. Nazca plate | 2. Between South America and Pacific plate C. Arabian plate | 3. Mostly the Saudi Arabian landmass D. Philippine plate | 4. Between the Asiatic and Pacific plate

Consider the following statements regarding the "Tillite" found in the Southern Hemisphere: 1. Counterparts are found only in the Northern Hemisphere. 2. It indicates extensive and prolonged glaciation. 3. It proves that these landmasses had completely different histories. Which of the statements given above is/are correct?

In the theory of Plate Tectonics, which of the following is classified as a "minor plate"?

With reference to the distribution of earthquakes and volcanoes, consider the following statements: 1. The foci of earthquakes in mid-oceanic ridge areas are generally at shallow depths. 2. The Alpine-Himalayan belt is characterized by shallow-seated earthquakes only. 3. The rim of the Atlantic Ocean is known as the "rim of fire". Which of the statements given above is/are correct?