Discovering Earth's Interior: Core–Mantle Boundary Quiz

By Surajit Dey

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Surajit, a content moderator at ProProfs, leverages his vast experience from his astrophysics background to create engaging and informative quizzes, especially on various space-related topics. He is also passionate and has in-depth knowledge of automobiles, computer games along with a passion for sports & current affairs.

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Questions: 10 | Attempts: 61 | Updated: Nov 30, 2023

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How Well Do You Know The Coremantle Boundary? - Quiz

Welcome to the "Discovering Earth's Interior: Core–Mantle Boundary Quiz"! This engaging quiz will guide you through the fascinating journey to the heart of our planet. As you navigate through the quiz, you'll gain a deeper understanding of the seismic waves that reveal the secrets of Earth's interior.

This quiz is a great opportunity to test your knowledge and learn more about the dynamic processes that shape our world. So, are you ready to take on the challenge and uncover the mysteries of Earth's core-mantle boundary? This quiz is not just a test but a learning experience that will enrich your understanding Read moreof our planet's inner workings.

This is your chance to delve into the heart of our planet to understand the forces that drive its evolution. Let's deepen our understanding of the world beneath our feet. Are you ready to take the plunge? Let the journey begin!

Core–Mantle Boundary Questions and Answers

1.

Which layer of the Earth is located between the outer core and the crust?
- A.
  
  Mantle
- B.
  
  Inner core
- C.
  
  Geodynamo
- D.
  
  Crust
Correct Answer
A. Mantle

Explanation
The mantle is the layer of the Earth located between the outer core and the crust. It is composed of solid rock that can flow slowly over long periods of time through mantle convection.

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2.

What is the driving force behind mantle convection?
- A.
  
  Plate tectonics
- B.
  
  Earth's rotation
- C.
  
  Geodynamo
- D.
  
  Radioactive decay
Correct Answer
D. Radioactive decay

Explanation
The driving force behind mantle convection is the heat generated by the radioactive decay of elements within the Earth's interior. This heat causes the mantle material to become less dense and rise, while cooler, denser material sinks.

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3.

What term describes the process of generating Earth's magnetic field through the motion of molten iron in the outer core?
- A.
  
  Plate tectonics
- B.
  
  Convection
- C.
  
  Geodynamo
- D.
  
  Solidification
Correct Answer
C. Geodynamo

Explanation
The process of generating Earth's magnetic field through the motion of molten iron in the outer core is known as the geodynamo. The movement of the liquid iron creates electric currents, which in turn generate the magnetic field.

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4.

What is the boundary between the Earth's mantle and outer core called?
- A.
  
  Asthenosphere
- B.
  
  D'' layer
- C.
  
  Lithosphere
- D.
  
  Mesosphere
Correct Answer
B. D'' layer

Explanation
The boundary between the Earth's mantle and outer core is called the D'' layer. It is a region of intense seismic activity and significant mineralogical changes occur at this boundary.

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5.

Which mineral phase is believed to be present in the D'' layer?
- A.
  
  Olivine
- B.
  
  Perovskite
- C.
  
  Feldspar
- D.
  
  Quartz
Correct Answer
B. Perovskite

Explanation
The mineral phase believed to be present in the D'' layer is perovskite. It is a high-pressure phase of the mineral that forms under extreme conditions and is thought to play a role in the dynamics of the core-mantle boundary.

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6.

What is the primary driving force behind plate tectonics?
- A.
  
  Gravitational forces
- B.
  
  Mantle convection
- C.
  
  Geodynamo
- D.
  
  Radioactive decay
Correct Answer
B. Mantle convection

Explanation
The primary driving force behind plate tectonics is mantle convection. The slow movement of the solid rock in the mantle causes the lithospheric plates to move and interact with each other, leading to various geological phenomena.

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7.

What is the state of the Earth's outer core?
- A.
  
  Solid
- B.
  
  Liquid
- C.
  
  Gas
- D.
  
  Plasma
Correct Answer
B. Liquid

Explanation
The state of the Earth's outer core is liquid. It is mainly composed of molten iron and nickel, and its movement generates the Earth's magnetic field through a process known as the geodynamo.

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8.

What is the approximate thickness of the Earth's mantle?
- A.
  
  100 km
- B.
  
  500 km
- C.
  
  2,900 km
- D.
  
  6,000 km
Correct Answer
C. 2,900 km

Explanation
The approximate thickness of the Earth's mantle is 2,900 km. It is the thickest layer of the Earth, accounting for about 84% of its volume. The upper mantle is rigid, while the lower mantle exhibits plastic or flowing behavior.

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9.

Which layer of the Earth contains the asthenosphere?
- A.
  
  Crust
- B.
  
  Mantle
- C.
  
  Outer core
- D.
  
  Inner core
Correct Answer
B. Mantle

Explanation
The layer of the Earth that contains the asthenosphere is the mantle. The asthenosphere is a semi-fluid, ductile region of the upper mantle beneath the lithosphere. It plays a crucial role in the movement and deformation of tectonic plates.

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10.

What process causes the formation and recycling of Earth's crust in plate tectonics?
- A.
  
  Subduction
- B.
  
  Crystallization
- C.
  
  Volcanism
- D.
  
  Erosion
Correct Answer
A. Subduction

Explanation
The process that causes the formation and recycling of Earth's crust in plate tectonics is subduction. Subduction occurs when one tectonic plate sinks beneath another, leading to the creation of volcanic arcs, mountain ranges, and earthquakes.

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Surajit Dey |Astrophysics, Sports, Automobiles |

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Nov 30, 2023

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Nov 30, 2023

Quiz Created by
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How Well Do You Know the Core–Mantle Boundary?

Core–Mantle Boundary Questions and Answers

Which layer of the Earth is located between the outer core and the crust?

What is the driving force behind mantle convection?

What term describes the process of generating Earth's magnetic field through the motion of molten iron in the outer core?

What is the boundary between the Earth's mantle and outer core called?

Which mineral phase is believed to be present in the D'' layer?

What is the primary driving force behind plate tectonics?

What is the state of the Earth's outer core?

What is the approximate thickness of the Earth's mantle?

Which layer of the Earth contains the asthenosphere?

What process causes the formation and recycling of Earth's crust in plate tectonics?