Earth Science Quiz

Structure and composition of earth.

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B. Identify the layers of the earth.

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Granite and basalt are both ___ rocks.

• Metamorphic

• Igneous

• Sedimentary

• Both A and B

The inner core is the center of the earth and it's about ___ thick.

• 1,500 kilometers

• 1,200 kilometers

• 1,400 kilometers

• 2,400 kilometers

The lower mantle is about ______thick.

• 400 kilometers

• 2,500 kilometers

• 2,200 kilometers

• 500 kilometers

The inner core is composed of solid ___ and nickel.

• Magnesium

• Aluminum

• Iron

• Silicon

The continental crust is composed mainly of ____.

• Limestone

• Iron

• Granite

• Nickle

Earth is not a perfect _____.

• Sphere

• Square

• Circle

• Triangle

The _____ is the outermost layer of the earth.

• Core

• Crust

• Mantle

• None of the choices

Scientists believe that the flow of molten metal in the outer core produces earth's _______.

• Magnetic field

• Electric field

• Gravitational field

• Nuclear field