Earth's Layers

How thick is the Earth's crust on average?

• 3 to 10 kilometers

• 5 to 70 kilometers

• 10 to 30 kilometers

• 50 to 100 kilometers

What are the two types of crust on Earth?

• Continental crust and oceanic crust

• Lithospheric crust and asthenospheric crust

• Inner crust and outer crust

• Basaltic crust and granitic crust

What is the only layer of the Earth that is completely liquid metal?

• Inner core

• Outer core

• Crust

• Mantle

What is the lithosphere?

• The layer of the Earth that includes the crust and the strong, rigid part of the mantle.

• The outermost layer of the Earth that is primarily composed of water.

• The gaseous layer surrounding the Earth that protects it from solar radiation.

• The molten layer beneath the Earth's crust that is responsible for volcanic activity.

What is the outer core primarily composed of?

• Solid iron and nickel

• Liquid iron and nickel

• Gaseous hydrogen and helium

• Plasma and carbon

What is the composition of the continental crust?

• The continental crust is primarily composed of lighter rocks such as granite.

• The continental crust is mainly made up of heavy metals like iron and nickel.

• The continental crust consists mostly of volcanic rocks like basalt.

• The continental crust is composed of sedimentary rocks like limestone.

What is the mantle?

• The outermost layer of the Earth made of solid rock.

• The layer of the Earth located between the crust and the outer core, made of semi-solid rock.

• The liquid layer surrounding the inner core of the Earth.

• The gaseous layer surrounding the Earth that contains the atmosphere.

What two layers make up the lithosphere?

• The crust and the mantle.

• The outer core and the inner core.

• The atmosphere and the hydrosphere.

• The crust and the outer core.

What is the difference between the inner core and outer core?

• The inner core is liquid and composed mainly of iron and nickel, while the outer core is solid and also composed mainly of iron and nickel.

• The inner core is solid and composed mainly of iron and nickel, while the outer core is liquid and also composed mainly of iron and nickel.

• The inner core is gaseous and composed mainly of hydrogen and helium, while the outer core is solid and composed mainly of iron and nickel.

• The inner core is solid and composed mainly of iron and sulfur, while the outer core is liquid and composed mainly of iron and nickel.

What is the composition of the oceanic crust?

• Granite

• Basalt

• Limestone

• Sandstone