Earth's Structure Quiz

What is the outermost layer of the Earth's surface called?

• Core

• Mantle

• Inner Core

• Crust

What is the average thickness of the continental crust?

• 50 km

• 35 km

• 8 km

• 5 km

Which elements primarily make up the crust?

• Oxygen and Hydrogen

• Magnesium and Calcium

• Silicon and Aluminium

• Iron and Nickel

What is the density of the oceanic crust compared to the continental crust?

• Not specified

• Equal density

• More dense

• Less dense

How thick is the mantle layer?

• 5,000 km

• 2,900 km

• 1,000 km

• 3,500 km

What is the average temperature of the lower mantle?

• 87 degrees Celsius

• 2,200 degrees Celsius

• 3,700 degrees Celsius

• 5,000 degrees Celsius

What is the innermost layer of the Earth called?

• Crust

• Upper Mantle

• Core

• Mantle

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

• Silicon and Aluminium

• Nickel and Iron

• Magnesium and Silicon

• Calcium and Iron

What state is the outer core in?

• Solid

• Liquid

• Gas

• Plasma

Why is the inner core solid despite its high temperature?

• High pressure

• Liquid state

• Cooling down

• Low pressure