RYA Chapter 1: Structure and Composition of Planet Earth Quiz
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Questions and Answers

What is the composition of the middle mantle or Asthenosphere?

Fluid, with the lithosphere floating on it

What are the two main components of the core of the Earth?

External core (probably liquid) and internal solid core

What is the main material that the core of the Earth is rich in?

Nickel and Iron

What is the range of density for the core of the Earth?

<p>Between 9 and 12</p> Signup and view all the answers

How does the temperature change as you move towards the center of the Earth?

<p>Increases</p> Signup and view all the answers

What are the three sources that contribute to changes in temperature inside the Earth?

<p>Solar radiation, in-depth radioactivity, initial heat from solar origin</p> Signup and view all the answers

What is the geothermal gradient for the Earth?

<p>1°C per ~33m</p> Signup and view all the answers

In which regions does the geothermal gradient reach 100m for a 1°C rise in temperature?

<p>Metallic fields (gisements)</p> Signup and view all the answers

What is the probable state of the external core of the Earth?

<p>Probably liquid</p> Signup and view all the answers

What causes the Earth's magnetic field?

<p>Liquid metallic material in the core</p> Signup and view all the answers

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