Once a Terrestrial Planet Had Formed from a Large Number

question 88

Multiple Choice

Once a terrestrial planet had formed from a large number of planetesimals, heat could have melted it and allowed it to differentiate into a metallic core of ____________density and a rocky mantle or crust of ____________ density.

• A)higher; lower
• B)lower; higher
• C)Wrong! The interior stays solid.
• D)Wrong! There is no separation according to density.

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Definitions:

Asthenosphere

The asthenosphere is the highly viscous, mechanically weak, and ductilely-deforming region of the upper mantle of the Earth, lying just below the lithosphere.

Transform Faults

A type of fault where two tectonic plates slide past each other horizontally, typically associated with earthquake activity.

Tsunami

A series of large ocean waves caused by underwater earthquakes, volcanic eruptions, or landslides, with the potential for devastating coastal impact.

Subsidence

The gradual sinking of the ground's surface, often due to natural processes like the compaction of sediment or human activities like the extraction of underground resources.