LAYERS OF THE EARTH

LAYERS OF THE EARTH

Objective: At the end of the lesson, you will be able to:

• describe the internal structure of the Earth.

Copy and paste link to another tab to play the game JOURNEY TO THE CENTER OF THE EARTH. If you are done then retun to QUIZZIZ!

http://www.bbc.com/future/bespoke/story/20150306-journey-to-the-centre-of-earth/

Take the Pre-assessment below.

Multiple Choice

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.

Multiple Choice

Why are there no P-waves or S-waves received in the P-wave shadow zone?

• P-waves are absorbed and S-waves are refracted by the Earth’s outer core.

• P-waves are refracted and S-waves are absorbed by the Earth’s outer core.

• Both the P-waves and S-waves are refracted by the Earth’s outer core.

• Both the P-waves and S-waves are absorbed by the Earth’s outer core.

Multiple Choice

What makes up the lithosphere?

• Continental crust

• Crust and the upper mantle

• Oceanic crust and continental crust

• Upper mantle

Multiple Choice

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

Multiple Choice

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.

Multiple Choice

The movement of the lithospheric plates is facilitated by a soft, weak and plastic-like layer. Which of the following layers is described in the statement?

• Asthenosphere

• Atmosphere

• Lithosphere

• Mantle

Multiple Choice

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

• Plate Tectonics

• Seafloor Spreading Theory

Multiple Choice

If you are a cartographer, what will give you an idea that the continents were once joined?

• Ocean depth

• Position of the South Pole

• Shape of the continents

• Size of the Atlantic Ocean

Multiple Choice

Which observation was NOT instrumental in formulating the hypothesis of seafloor spreading?

• Depth of the ocean

  of glacial deposits

  oceanic crust

• Identifying the location of glacial deposits

• Magnetization of the

• Thickness of seafloor sediments

Multiple Choice

As a new seafloor is formed at the mid-ocean ridge, the old seafloor farthest from the ridge is destroyed. Which of the stated processes describes how the oceanic crust plunges into the Earth and destroyed in the mantle?

• Convection

• Construction

• Diversion

• Subduction

Open Ended

What are the different layers of the Earth?

Open Ended

Why is there a need to study the Earth’s layers?

Open Ended

What proves the existence of the boundary between the crust and the mantle?

Open Ended

What are the characteristics of the asthenosphere?

Open Ended

What do the shapes of the continents now tell us about their past?

Multiple Choice

If you are a cartographer, what will give you an idea that the continents were once joined?

• Ocean depth

• Position of the South Pole

• Shape of the continents

• Size of the Atlantic Ocean