Worksheet: Distribution of Oceans and Continents | Geography Class 11 - Humanities/Arts PDF Download

Fill in the Blanks

Q1: According to Alfred Wegener, all the continents formed a single continental mass called ________.

Q2: The mega-ocean surrounding Pangaea was named ________.

Q3: Pangaea first broke into two large continental masses known as ________ and ________.

Q4: The sedimentary rock formed from deposits of glaciers is called ________.

Q5: The distribution of identical species of plants and animals on either side of marine barriers led to the concept of ________.

Q6: The force responsible for drifting of continents due to the Earth's rotation is called ________.

Q7: The theory of plate tectonics was introduced by ________.

Q8: Divergent boundaries are associated with the creation of ________.

Q9: The slowest rate of plate movement occurs along the ________.

Q10: The boundary where two plates neither produce nor destroy crust as they slide past each other is called ________.

Assertion and Reason Based

Q1: Assertion: The shorelines of Africa and South America have a remarkable match.
Reason: This match is due to the gravitational pull of the moon and the sun.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false.

Q2: Assertion: Seafloor spreading supports the theory of continental drift.
Reason: Seafloor spreading occurs when new oceanic crust is formed through volcanic activity.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false.

Q3: Assertion: Plate boundaries where crust is neither produced nor destroyed are called transform boundaries.
Reason: Transform boundaries are associated with the creation of new crust.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false.

Q4: Assertion: The Indian Plate is currently moving away from the Eurasian Plate.
Reason: The collision between the Indian Plate and the Eurasian Plate caused the formation of the Himalayas.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false.

Q5: Assertion: The concept of plate tectonics emphasizes the dynamic nature of the Earth's surface.
Reason: Heat generated from radioactive decay is the primary driving force behind plate movement.
(a) Both assertion and reason are true, and the reason is the correct explanation of the assertion.
(b) Both assertion and reason are true, but the reason is not the correct explanation of the assertion.
(c) Assertion is true, but the reason is false.
(d) Assertion is false.

Very Short Answer Type Questions

Q1: What does "Pangaea" mean?

Q2: How does the radiometric dating of rocks across continents support continental drift?

Q3: What is the significance of tillite in the evidence for continental drift?

Q4: Explain the concept of Lemuria in the context of continental drift.

Q5: Where are Mesosaurus skeletons found, and why is their distribution significant?

Q6: What are placer deposits, and how do they relate to continental drift?

Q7: How do plate tectonics cause earthquakes and volcanoes?

Q8: Define seafloor spreading and its role in continental drift.

Q9: Name three types of plate boundaries and briefly describe each.

Q10: What is the driving force behind plate movement according to plate tectonics?

Short Answer Type Questions

Q1: Describe the evidence provided by the matching shorelines of Africa and South America for the continental drift theory.

Q2: Explain the significance of rocks of the same age found on different continents. How does this support continental drift?

Q3: Discuss the concept of "tillite" and its role in providing evidence for continental drift.

Q4: How do placer deposits in Ghana relate to the continental drift theory?

Q5: Explore the distribution of Lemurs and Mesosaurus and their implications for continental drift.

Q6: Describe the forces responsible for driving the movement of continents according to Wegener.

Q7: What is seafloor spreading, and how does it support the theory of plate tectonics?

Q8: Explain the role of convection currents in the mantle in the context of tectonic plate movement.

Long Answer Type Questions

Q1: Discuss the continental drift theory proposed by Alfred Wegener. Include details about Pangaea, the breakup of continents, and the evidence supporting this theory.

Q2: Explain the concept of plate tectonics and the types of plate boundaries. Provide examples for each type of boundary.

Q3: Analyze the movement of the Indian plate, its history, and the impact on the Himalayas. Include key geological events in this process.

Q4: Elaborate on the role of convection currents in the mantle and their influence on tectonic plate movement. Discuss how this concept has evolved over time in understanding continental drift.