Convection Currents & Layers of the Earth

What is the rocky outer layer of Earth, composed mostly of silicon and oxygen?

• mantle

• core

• crust

• lithosphere

What is the layer of Earth between the crust and the core?

• mantle

• tectonic plate

• asthenosphere

• lithosphere

What is the innermost layer of Earth?

• mantle

• core

• asthenosphere

• crust

What is composed mostly of iron and nickel?

• mantle

• core

• asthenosphere

• crust

What is composed of solid and partially molten rock that is rich in magnesium and iron?

• mantle

• core

• asthenosphere

• crust

What is the hottest layer with the highest pressure?

• mantle

• core

• asthenosphere

• crust

What has the largest mass of Earth's layers?

• mantle

• core

• crust

• lithosphere

This is about 10 km thick (thin dense layer).

• Oceanic crust

• mesosphere

• Continental crust

• tectonic plate

This is about 50 km thick (thicker, less dense layer).

• Oceanic crust

• mesosphere

• Continental crust

• tectonic plate

What are the layers of the Earth distinguished by the chemical or compositional makeup of each layer?

• Physical Layers of the Earth

• Compositional (Chemical) Layers of the Earth

• Lithosphere

• Mesosphere