Unit 6 Review Layers of the Earth

Which layer is the thinnest, outermost layer of the Earth? 

• Crust
• Mantle
• Inner Core
• Outer Core

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's core?

• 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.

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

• Inner Core
• Outer Core
• Lithosphere
• Asthenosphere

What two layers of the Earth have convection currents?

• 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 iron and nickel
• Molten (liquid) iron and nickel

What is the outer core composed of?

• silicon and oxygen
• magnesium and iron
• Solid iron and  nickel
• Molten (liquid) iron and nickel

Which statement is true about Earth’s inner core?

• It is under extreme heat which makes it a liquid
• It is the least dense layer
• It is under extreme pressure which makes it a solid    
• It is as hot as the core of our sun

Which layer of the Earth is the thickest and consist of magnesium and iron? 

• Crust
• Mantle
• Inner Core
• Outer Core

What is the relationship between the lithosphere and the asthenosphere? 

• Convection currents in the lithosphere cause the asthenosphere to move.
• The crust and the core make up the lithosphere.
• The crust and mantle make up the asthenosphere. 
• Convection currents in the asthenosphere cause the lithosphere to move.