MCQs on Earth's Structure and Plate Tectonics

Which of the following is part of Earth's structure based on chemical composition?

• Lithosphere

• Crust

• Mantle

• Core

Which are characteristics of the Earth's crust?

• Thin

• Brittle

• Made of rock

• Molten state

What are the two types of Earth's crust?

• Oceanic crust

• Continental crust

• Lithospheric crust

• Mesospheric crust

Which of the following describes the oceanic crust?

• Thinner and denser

• 5-12 km thick

• Rich in silicates and magnesium (SIMA)

• Rich in silicates and aluminum (SIAL)

The continental crust is:

• Thicker than the oceanic crust

• Less dense than the oceanic crust

• Rich in silicates and aluminum (SIAL)

• Rich in silicates and magnesium (SIMA)

The mantle consists of:

• Upper mantle

• Lower mantle

• Lithosphere

• Mesosphere

Which of the following statements about the mantle is true?

• It is beneath the crust.

• The upper mantle is cool and brittle.

• The lower mantle is hot and soft.

• The mantle is composed of iron and nickel.

Which characteristics describe the Earth's core?

• Dense and metallic

• Composed of iron and nickel (NIFE)

• Composed of silicates

• 2250 km in thickness

The outer core is:

• Surrounding the inner core

• 2250 km thick

• Rocks are in molten state

• The hottest part of the Earth

The inner core is:

• The densest part of Earth

• Over 5000°C in temperature

• Rocks are in a solid state

• 3485 km in radius