Exploring Earth's Layers Quiz

What is the innermost layer of the Earth called?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is primarily composed of liquid iron and nickel?

• Crust

• Mantle

• Outer Core

• Inner Core

Which layer of the Earth is the thinnest?

• Crust

• Mantle

• Outer Core

• Inner Core

Explain why the inner core is solid while the outer core is liquid.

• The inner core is under more pressure.

• The inner core is colder than the outer core.

• The inner core has more iron.

• The inner core is older.

Describe the relationship between the crust and the mantle.

• The crust is above the mantle and is part of the lithosphere.

• The crust is below the mantle and is part of the asthenosphere.

• The crust is within the mantle and is part of the mesosphere.

• The crust is above the mantle and is part of the core.

How does the temperature change as you move from the crust to the inner core?

• It decreases.

• It remains constant.

• It increases.

• It fluctuates.

Identify the layer of the Earth that is semi-solid and allows tectonic plates to move.

• Crust

• Mantle

• Outer Core

• Inner Core

Compare the composition of the inner core and the outer core.

• Both are solid and made of silicate rocks.

• Both are liquid and made of water.

• The inner core is solid, and the outer core is liquid, both made of iron and nickel.

• The inner core is liquid, and the outer core is solid, both made of iron and nickel.

What is the primary reason for the high temperatures in the Earth's core?

• Solar radiation

• Radioactive decay

• Ocean currents

• Atmospheric pressure

Which layer of the Earth is the hottest?

• Crust

• Mantle

• Outer Core

• Inner Core