Exploring Earth's Dynamic Layers

What is the primary composition of Earth's inner core?

• Iron and nickel

• Silicon and oxygen

• Magnesium and aluminum

• Carbon and hydrogen

Tags

NGSS.MS-PS1-1

Which process in the mantle is responsible for the movement of tectonic plates?

• Radiation

• Convection currents

• Conduction

• Sublimation

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NGSS.MS-ESS2-3

Who proposed the theory of continental drift?

• Harry Hess

• Alfred Wegener

• Isaac Newton

• Charles Darwin

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NGSS.HS-ESS1-5

What evidence supports the theory of continental drift?

• Similar fossils found on different continents

• The presence of volcanoes

• The occurrence of earthquakes

• The existence of ocean currents

Tags

NGSS.MS-ESS2-3

NGSS.MS-LS4-1

What is the process called when oceanic crust sinks into the mantle at a trench?

• Subduction

• Convection

• Erosion

• Deposition

Tags

NGSS.MS-ESS2-3

Which scientist is credited with the discovery of sea floor spreading?

• Alfred Wegener

• Harry Hess

• Marie Curie

• Albert Einstein

Tags

NGSS.MS-ESS2-3

Explain how convection currents in the mantle contribute to the movement of tectonic plates.

• They create magnetic fields that push the plates.

• They cause the mantle to expand and contract, moving the plates.

• They generate heat that melts the plates.

• They circulate heat, causing the plates to move.

Tags

NGSS.MS-ESS2-1

Describe the role of subduction zones in the recycling of Earth's crust.

• They create new crust by volcanic activity.

• They destroy old crust by melting it into the mantle.

• They preserve crust by preventing erosion.

• They transform crust into sedimentary rock.

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NGSS.MS-ESS2-1

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

How did the discovery of similar rock formations on different continents support the theory of continental drift?

• It showed that continents were once connected.

• It proved that continents have always been separate.

• It indicated that rocks can travel across oceans.

• It suggested that rocks form independently on each continent.

Tags

NGSS.MS-ESS2-3

Analyze how the age of rocks on the ocean floor provides evidence for sea floor spreading.

• Older rocks are found near mid-ocean ridges.

• Younger rocks are found near mid-ocean ridges.

• Rocks are the same age throughout the ocean floor.

• Rocks age faster near the continents.

Tags

NGSS.HS-ESS1-5