Earth Formation Lesson

Which statement BEST describes the relationship between Earth's mantle and core?

• The mantle lies just below the core.

• The mantle and core are made up of hard, solid rock.

• The core is denser than the mantle.

• Material in the core and mantle combines to form tectonic plates.

Tectonic plates that make up Earth's crust move because of _________________ in Earth's mantle.

• conduction currents

• convection currents

• gravity

• magnetic forces

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NGSS.MS-ESS2-3

The picture below shows a simple model of Earth's layers. Which letter represents the layer that is thin, rocky, and is the least dense of all Earth's layers?

• layer V

• layer W

• layer Y

• layer Z

Tags

NGSS.MS-ESS2-1

Mountains can be formed when one plate is forced under another. The plate on top folds up like an accordion and forms mountains. The plate forced under usually melts. What event is most likely to occur after much of the plate forced under has melted?

• a flood

• a tsunami

• a volcanic eruption

• an avalanche

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NGSS.MS-ESS3-2

According to the theory of plate tectonics, where do activities such as earthquakes and volcanic eruptions occur?

• along plate boundaries

• in the centers of plates

• above the surfaces of plates

• in the outer regions of plates

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NGSS.MS-ESS3-2

The picture shows a model of Earth's layers. Which statement best describes Layer 2?

• It is the upper mantle made mostly of solid rock.

• It is the lithosphere where Earth's heat is generated.

• It is the solid inner core where semiliquid magma flows.

• It is the liquid outer core made mostly of nickel and iron.

Tags

NGSS.MS-ESS2-1

The picture shows a hard-boiled egg, where the shell is a model for the lithosphere of Earth. What do the cracks in the eggshell represent?

• mountain ranges in the Northern Hemisphere

• holes in the ozone layer of the atmosphere

• fault lines made by moving tectonic plates

• the boundaries between land and ocean

Which explanation describes why seafloor spreading occurs?

• Lithospheric plates join together under the ocean floor.

• Lithospheric plates are formed under the ocean floor.

• Lithospheric plates move apart under the ocean floor.

• Lithospheric plates rub together under the ocean floor.

Florida is located on which tectonic plate?

• Pacific Plate

• North American Plate

• South American Plate

• Eurasian Plate

Why is the distance between Europe and North America slowly increasing each year?

• tectonic plate movement

• erosion of the mountains

• severe earthquakes

• the curvature of Earth

Tags

NGSS.MS-ESS2-3

NGSS.MS-ESS2-2