APES Unit 4

What is the approximate thickness of the Earth's crust under the oceans?

• ~3 to 5 miles (8 km)

• ~25 miles (32 km)

• ~60 miles (100 km)

• ~430 miles (700 km)

Which layer of the Earth is described as "partially molten or deforms fluidly like 'plastic under pressure'"?

• Lithosphere

• Asthenosphere

• Lower Mantle

• Outer Core

What is the state of the Earth's outer core?

• Rigid

• Partially molten

• Liquid phase

• Solid phase with high plasticity

What is the approximate thickness of the Earth's crust under the continents?

• ~3 to 5 miles (8 km)

• ~25 miles (32 km)

• ~60 miles (100 km)

• ~430 miles (700 km)

Which of the following is the outermost layer of the Earth?

• Mantle

• Inner core

• Outer core

• Crust

Which layer of the Earth is directly below the lithosphere?

• Crust

• Asthenosphere

• Outer core

• Inner core

What is the Earth's crust made of?

• Liquid magma

• Gas

• Solid rock

• Ice

Which layer of the Earth is the thinnest?

• Mantle

• Outer Core

• Inner Core

• Crust

What is the composition of the oceanic crust?

• Granite

• Basalt

• Limestone

• Sandstone

Which type of crust is less dense?

• Oceanic Crust

• Continental Crust

• Both are equally dense

• The density is not specified