Unit 4 | Exploring Earth's Layers and Mantle

What is the outermost layer of the Earth called?

• Mantle

• Crust

• Core

• Inner Core

What layer of the Earth is broken up into tectonic plates?

• Mantle

• Crust

• Core

• Inner Core

Which layer of the Earth is primarily composed of solid iron and nickel?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth produces heat that radiates throughout the planet?

• Crust

• Mantle

• Outer Core

• Inner Core

What process in the mantle is responsible for the movement of tectonic plates?

Which layer of the Earth is directly below the crust?

• Inner Core

• Outer Core

• Mantle

• Lithosphere

Describe the state of matter of the Earth's outer core.

• Solid

• Liquid

• Gas

• Plasma

What is the primary reason for the movement of convection cells in the mantle?

• Density differences caused by differences in composition

• Density differences caused by differences in temperature

• Gravitational pull

• There is no convection in the mantle

Which layer of the Earth is the thickest?

• Crust

• Mantle

• Outer Core

• Inner Core

Explain how density affects the movement of convection cells in the mantle.

• Denser materials rise, less dense materials sink

• Less dense materials rise, denser materials sink

• Density has no effect on convection cells

• Density causes materials to remain stationary