Continental Drift, Seafloor Spreading, and Plate Tectonics

Thinner, more dense, younger crust, primarily basaltic, making ocean floor

• mantle

• continental crust

• oceanic crust

• asthenosphere

The portion of the earth's crust that primarily contains granite, is less dense than oceanic crust, and is 20-50 km thick

• mantle

• continental crust

• oceanic crust

• asthenosphere

The land mass where all of the continents were once together in one large continent is called ________________.

• Laurasia

• Gondwana

• Panthalassa

• Pangea

A Plate Boundary where two plates move toward each other is called

• Convergent Boundary

• Divergent Boundary

• Transform Boundary

• Subduction

Boundary between two plates that are sliding past each other

• transform

• divergent

• convergent

• strike-slip

Tags

NGSS.MS-ESS2-3

The process by which oceanic crust sinks beneath a deep-ocean trench and back into the mantle at a convergent plate boundary.

• stressing

• seafloor spreading

• subduction

• shearing

Tags

NGSS.MS-ESS2-2

The continents were once all together but have slowly moved apart over time.

• Continental Drift Theory

• Plate Tectonic Theory

• Seafloor Spreading

• Convection Current

Tags

NGSS.MS-ESS2-2

NGSS.MS-ESS2-3

Ancient land mass where all continents were together

• Pangea

• North America

• continental plate

• continental drift

Tags

NGSS.MS-ESS2-3

Solid, outermost layer of the earth made of plates and continents

• lithosphere

• asthenosphere

• core

• Seafloor

Plates that are moving apart from each other

• divergent boundary

• convergent boundary

• subduction zone

• continental drift

Tags

NGSS.MS-ESS2-3