Earth's Layers and Planetary Differentiation

Which layer of the Earth is the outermost?

• Crust

• Mantle

• Outer Core

• Inner Core

What is the composition of the Earth's crust?

• Solid rocks

• Partially melted rocks

• Liquid metal

• Gaseous elements

Which layer of the Earth is the thickest?

• Crust

• Mantle

• Outer Core

• Inner Core

What is the main reason for the temperature difference between the crust and the inner core?

• Proximity to the sun

• Radioactive decay

• Ocean currents

• Atmospheric pressure

Which layer of the Earth is the innermost?

• Crust

• Mantle

• Outer Core

• Inner Core

What type of wave travels only through solids and reflects when it hits a liquid or the outer core?

• P-wave

• S-wave

• Surface wave

• Longitudinal wave

Why are there convection currents in the asthenosphere?

• Because the asthenosphere is solid

• Because the asthenosphere is melted rock and flows

• Because the asthenosphere is cold

• Because the asthenosphere is dry.

Which layer of the Earth is directly above the outer core?

• Inner core

• Lower mantle

• Crust

• Upper mantle

What is the significance of the cross-section diagram of Earth's interior?

• It shows the atmospheric layers

• It illustrates the temperature and density of Earth's layers

• It depicts ocean currents

• It maps tectonic plates.

Which layer is found above the asthenosphere?

• Oceanic crust

• Trench

• Lithosphere

• Mantle