Earth's Layers Quiz

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

• 200 to 250 kilometers

• 5 to 10 kilometers

• 30 to 60 kilometers

• 100 to 150 kilometers

Which part of the Earth's mantle is directly below the lithosphere?

• Asthenosphere

• Lower mantle

• Outer core

• Crust

How thick is the Earth's outer core?

• Approximately 5,000 kilometers

• Approximately 3,000 kilometers

• Approximately 2,300 kilometers

• Approximately 1,200 kilometers

What is the primary composition of the Earth's core?

• Iron and magnesium

• Nickel and iron

• Oxygen and silicon

• Silicon and magnesium

What distinguishes the inner core from the outer core in terms of physical state?

• Both cores are liquid but with different viscosities

• The inner core is solid due to high pressure

• The outer core is solid due to high temperature

• The inner core is liquid due to high pressure