Unit 4 Review

Which statement best describes what has happened to Earth’s crust over time?

• The crust has cooled to form solid nickel and iron.

• The crust has changed position because of Earth’s magnetic field.

• The crust has been broken into pieces that move over molten rock.

• The crust has heated up because of its position near the Earth’s molten inner core.

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NGSS.MS-ESS2-2

The diagram below shows the layers of Earth. Which part of the diagram represents the mantle?

• 1

• 2

• 3

• 4

What is the primary reason that continents are found at higher elevations than the ocean floor?

• Continental crust is more dense than oceanic crust.

• Continental crust covers more surface area than oceanic crust.

• Continental crust is less dense than oceanic crust.

• Continental crust covers less surface area than oceanic crust.

What happens when a wave created by an earthquake passes from the crust to the mantle?

• The wave changes speed.

• The wave reverses direction.

• The wave increases in energy.

• The wave stops moving.

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NGSS.MS-PS4-2

What is the relationship between Earth’s inner core and outer core?

• The two cores are separated by the mantle.

• The less dense, liquid inner core is suspended in the solid outer core.

• The two cores are separated by the crust.

• The denser, solid inner core is suspended in the liquid outer core.

Which statement best compares Earth’s core to the mantle?

• Both are in direct contact with the crust.

• The core is a thick, cold, convective layer, while the mantle is dense and metallic.

• Neither are in direct contact with the crust.

• The mantle is a thick, hot, convective layer, while the core is dense and metallic.

Which order correctly lists Earth’s layers from least dense to most dense?

• asthenosphere, crust, atmosphere, mantle

• inner core, outer core, mantle, crust

• lithosphere, atmosphere, inner core, outer core

• crust, mantle, outer core, inner core

This table shows the layers of Earth and several characteristics of each layer. Which layer of Earth has the highest average temperature?

• crust

• lower mantle

• inner core

• outer core

Each row in the chart below shows the results of interactions between crustal plates. Which row best represents a divergent boundary?

• X

• W

• Z

• Y

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NGSS.MS-ESS2-3

How can an earthquake affect Earth’s crustal plates?

• It can cause the crustal plates to shift.

• It can cause the crustal plates to disappear.

• It can cause the temperature of the crustal plates to increase.

• It can cause the size of the crustal plates to increase.

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS3-2