Earth's Structure EEV

Which of the following is NOT a method used by geologists to deduce the composition of the Earth's core?

• Composition of the crust

• Composition of asteroids

• Mass of the Earth

• Studying plant fossils

What is the primary difference between P-waves and S-waves as shown in the diagram?

• P-waves can travel through both liquids and solids, while S-waves can only travel through solids.

• P-waves can only travel through solids, while S-waves can travel through both liquids and solids.

• Both P-waves and S-waves can travel through liquids and solids.

• Neither P-waves nor S-waves can travel through liquids.

What is the significance of the shadow zones in the diagram?

• They indicate areas where no seismic waves are detected.

• They indicate areas where only S-waves are detected.

• They indicate areas where only P-waves are detected.

• They indicate areas where both P-waves and S-waves are detected.

How does the mantle transport heat from the core to the surface?

• Radiation

• Conduction

• Convection

• Diffusion

Which feature in the diagram is responsible for the movement of tectonic plates?

• Hot spot

• Cool descending oceanic plate

• Oceanic ridge

• Core

What is the role of the "Hot rising mantle plume" in the diagram?

• It cools the oceanic plates

• It causes the formation of oceanic ridges

• It contributes to the upward movement of material in the mantle

• It stabilizes the core temperature

What is a characteristic of the asthenosphere?

• It is completely solid

• It flows as a soft ductile solid

• It is entirely liquid

• It is a gas

What is the significance of the asthenosphere in terms of earthquakes?

• It generates earthquakes

• It is incapable of generating earthquakes

• It prevents earthquakes

• It amplifies earthquakes

Where is the Earth's crust thickest?

• Under the oceans

• Under mountain ranges

• At the equator

• At the poles

What is the average rock density of the continental crust?

• 2.7 g/cm³

• 3.0 g/cm³

• 2.5 g/cm³

• 3.5 g/cm³