Geography Class 7 Chapter 2: Inside Our Earth
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Questions and Answers

What is the composition of the Earth's inner core?

  • Silicon and oxygen
  • Iron and nickel (correct)
  • Gold and silver
  • Aluminum and titanium

Which layer of the Earth is composed of semi-solid rock and is capable of flowing?

  • Inner core
  • Mantle (correct)
  • Outer core
  • Crust

What is the primary process that causes movement and convection currents in the Earth's mantle?

  • Solar radiation
  • Magnetic field disturbances
  • Radioactive decay (correct)
  • Gravitational pull from the moon

What is the approximate temperature of the Earth's inner core?

<p>Around 5,000 degrees Celsius (D)</p> Signup and view all the answers

The Earth's inner core is composed of liquid iron and nickel.

<p>False (B)</p> Signup and view all the answers

The lithosphere is the thickest layer of the Earth's interior.

<p>False (B)</p> Signup and view all the answers

The movement of tectonic plates is primarily caused by convection currents in the Earth's outer core.

<p>False (B)</p> Signup and view all the answers

The process of subduction occurs when two tectonic plates move away from each other.

<p>False (B)</p> Signup and view all the answers

The asthenosphere is the thickest layer of the Earth's interior.

<p>False (B)</p> Signup and view all the answers

The Earth's outer core is composed of solid iron and nickel.

<p>False (B)</p> Signup and view all the answers

Convection currents in the Earth's mantle are primarily driven by radioactive decay.

<p>True (A)</p> Signup and view all the answers

The process of subduction occurs when two tectonic plates collide and move towards each other.

<p>True (A)</p> Signup and view all the answers

Study Notes

Earth's Inner Core

  • Composed of solid iron and nickel
  • Approximate temperature: extremely high

Earth's Layers

  • Lithosphere: not the thickest layer of the Earth's interior
  • Asthenosphere: not the thickest layer of the Earth's interior

Earth's Mantle

  • Composed of semi-solid rock, capable of flowing
  • Convection currents: primary process caused by heat from radioactive decay
  • Drives the movement of tectonic plates

Plate Movement

  • Caused by convection currents in the Earth's mantle
  • Process of subduction: occurs when two tectonic plates collide and move towards each other

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Description

Test your knowledge about the composition and layers of the Earth's interior. This quiz covers topics like the composition of the Earth's inner core, the layers of the Earth, and the processes that cause movement in the Earth's mantle.

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