Module 2: Pre-assessment

An S-wave shadow zone is formed as seismic waves travel through the Earth’s body. Which of the following statements does this S-wave shadow zone indicate?

• The inner core is liquid.

• The inner core is solid.

• The mantle is solid.

• The outer core is liquid.

What makes up the lithosphere?

• Continental crust

• Crust and the upper mantle

• Oceanic crust and continental crust

• Upper mantle

Miners dig into the Earth in search for precious rocks and minerals. In which layer is the deepest explorations made by miners?

• Crust

• Inner core

• Mantle

• Outer core

How do you compare the densities of the Earth’s crust, mantle and core?

• The mantle is less dense than the core but denser than the crust.

• The mantle is less dense than both the core and the crust.

• The mantle is denser than the core but less dense than the crust.

• The mantle is denser than both the core and the crust.

Alfred Wegener is a German scientist who hypothesized that the Earth was once made up of a single large landmass called Pangaea. Which of the following theories did Wegener propose?

• Continental Drift Theory

• Continental Shift Theory

• Plate Tectonics

• Seafloor Spreading Theory