3 minutes to the center of Earth

What analogy is used to describe the Earth's layered structure?

• A cake

• An onion

• A tree trunk

• A ball of yarn

Which of the following can be found in the Earth's crust?

• Worms at 3 km depth

• The Kola Superdeep Borehole

• Ancient underground cities

• Flowing hot rock

What is a characteristic of the Earth's mantle?

• It is a solid, unmoving layer.

• It is made of flowing red-hot iron and nickel.

• It consists of hot rock that flows very slowly.

• It is the outermost layer where life exists.

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What important function does the Earth's outer core perform?

• It houses ancient underground cities.

• It is where most of Earth's life forms reside.

• It creates a magnetic field that protects Earth from solar rays.

• It is a solid sphere of crystallized metals.