Unit 3: Inside the Earth

What is Layer 4?

• 
  It is the solid, dense crust.
• It is the liquid, quickly rotating inner core.
• 
  It is the solid, brittle upper mantle.
•  It is the semiliquid, slow moving outer core.

Florida is located on which tectonic plate?

• 
  Pacific Plate
• 
  North American Plate
• 
  South American Plate
• 
  Eurasian Plate

 Why does the inner core of Earth remain solid even though it is very hot?

• . The Coriolis effect creates a centralized gravitational spin at Earth's core.
• The pressure is so great at the inner core that it causes atoms to push together.
• The inner core is not as hot as the outer core.
• The inner core is made of the same material as the mantle.

Which letter identifies the lithosphere layer?

• W
• Z
• V
• U

Which statement correctly describes the outer core?

• Composed primarily of magnesium, oxygen, aluminum, and silicon, the outer core is a dense, solid layer, and is responsible for the motion of Earth's plates.
• Composed primarily of iron and nickel, the outer core is a liquid layer that rotates around the inner core, and is responsible for Earth's magnetic field.
• Composed primarily of silica particles, the outer core is the outermost layer of Earth, and varies in temperature and thickness.
• Composed primarily of magnesium and iron particles, the outer core is the middle layer of Earth, and contains the most heat.

Going from the center outward, what are the four major layers of the Earth in order?

• the crust, mantle, inner core, and outer core
• the inner core, outer core, crust, and mantle
• the inner core, outer core, mantle, and crust
•  the mantle, inner core, outer core, and crust

What is the source of the magma that erupts from a volcano?

•  the outer core
• the inner core
• the mantle
• Earth's oceans

What is the lithosphere?

• another name for the crust
• 
  the liquid layer that the crust floats on
• the uppermost solid portion of the mantle
• 
  the uppermost solid portion of the mantle and the crust

What is the name of the nearly continuous layer of rock at Earth's surface?

• asthenosphere
• lithosphere
• 
  inner core
• outer core

The lithosphere is one of Earth's layers. What makes up the lithosphere?

• 
  the inner and outer cores
• 
  the upper and lower mantle
• 
  the mantle and outer core
• the crust and upper mantle