Earth's Layers and Plate Boundaries

Which layer of the Earth is the thinnest, least dense, and made of rock (continental & oceanic)?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is the thickest and made of hot rock that moves in convection currents?

• Mantle

• Crust

• Core

• Lithosphere

Which layer of the Earth is made of liquid iron & nickel and generates Earth's magnetic field?

• Outer Core

• Crust

• Mantle

• Inner Core

Which layer of the Earth is solid iron & nickel, densest & hottest layer?

• Inner Core

• Mantle

• Crust

• Outer Core

As you go deeper inside Earth, what happens to temperature and density?

• Temperature and density both increase.

• Temperature increases and density decreases.

• Temperature decreases and density increases.

• Temperature and density both decrease.

What type of plate boundary is described as plates colliding, resulting in mountains, volcanoes, and earthquakes?

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

• Passive Boundary

What type of plate boundary is described as plates pulling apart, creating new crust, mid-ocean ridges, and rift valleys?

• Divergent Boundary

• Convergent Boundary

• Transform Boundary

• Subduction Zone

What type of plate boundary is described as plates sliding past each other, causing earthquakes but not creating or destroying crust?

• Transform Boundary

• Convergent Boundary

• Divergent Boundary

• Subduction Zone

Heat in the mantle causes hot magma to rise and cooler magma to sink.

• True

• False

What does the circulation of magma in the mantle do to lithospheric plates?

• It pushes and pulls lithospheric plates, driving tectonics.

• It causes the plates to dissolve completely.

• It makes the plates float upwards into the atmosphere.

• It turns the plates into liquid magma instantly.