Exploring Earth's Structure

What are the three main layers of the Earth?

• Mantle, Crust, Atmosphere

• Inner Shell, Outer Shell, Surface

• Crust, Mantle, Core

• Lithosphere, Atmosphere, Hydrosphere

What is the outermost layer of the Earth called?

• Core

• Crust

• Mantle

• Lithosphere

What is the Earth's crust primarily made of?

• Organic materials, primarily coal and oil.

• Silicate minerals, primarily feldspar and quartz.

• Igneous rocks, primarily basalt and granite.

• Metals, primarily iron and copper.

How thick is the Earth's crust on average?

• 30 kilometers

• 15 kilometers

• 20 kilometers

• 50 kilometers

What layer lies directly beneath the Earth's crust?

• Core

• Lithosphere

• Asthenosphere

• Mantle

What is the mantle made of?

• The mantle is made of silicate minerals, primarily olivine and pyroxene.

• The mantle is made of solid iron and nickel.

• The mantle consists mainly of carbon-based compounds.

• The mantle is primarily composed of water and ice.

What is the temperature range in the Earth's mantle?

• 1,000 to 2,500 degrees Celsius

• 500 to 4,000 degrees Celsius

• 4,000 to 6,000 degrees Celsius

• 100 to 1,000 degrees Celsius

What are the two main parts of the Earth's core?

• Crust and mantle

• Outer core and inner core

• Lithosphere and asthenosphere

• Upper core and lower core

What is the outer core primarily composed of?

• Gaseous carbon dioxide and sulfur

• Liquid hydrogen and oxygen

• Solid gold and silver

• Molten iron and nickel

What is the inner core primarily made of?

• Lead and sulfur

• Silicon and aluminum

• Copper and zinc

• Iron and nickel