Earth's Layers Review

Which layer of the Earth is the thickest? 

• Crust
• Mantle
• Inner Core
• Outer Core

Which layer of Earth is the thinnest? 

• Crust
• Mantle
• Inner Core
• Outer Core

Which sublayer is made up of the crust and upper mantle?

• Inner Core
• Outer Core
• Lithosphere
• Asthenosphere

Which of these statements is true about Earth’s crust?

• A.      It includes the continents but not the ocean floor.
• A.      It is a layer of solid rock made up of the same type of rock throughout.
• A.      It is a changing, moving, surface with the same thickness everywhere.
• A.      It is a made of two separate types of crust with different densities.

If we compare the temperature and pressure of the Earth’s mantle to the core, what differences can we expect as we move downward into the Earth?

• Both the temperature and pressure increase.
• Both the temperature and pressure decrease.
• The temperature increases and the pressure decrease.
• The temperature decreases and the pressure increases.

What two layers of the Earth are not solid?

• Crust and mantle
• Inner core and outer core
• Outer core and asthenosphere
• Lithosphere and asthenosphere

What is the inner core composed of?

• Basalt
• Granite
• Solid Metals
• Molten (liquid) Metals

What is the outer core composed of?

• Basalt
• Granite
• Solid Metals
• Molten (liquid) Metals

What observation can we make about Earth’s lithosphere AND asthenosphere?

• The asthenosphere floats on top of the lithosphere.
• The crust and the core make up the lithosphere.
• The crust and mantle make up the asthenosphere. 
• The lithosphere floats on top of the asthenosphere

Oceanic crust is mostly made of ___________ and continental crust is mostly made of ___________.

• Granite, basalt  
• Basalt, granite
• Basalt, shale
• Granite, slate