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Pangaea is: . Large, ancient landmass that was composed of all the continents joined together. Theory of PlateTectonics is: . Theory that the Earth’s crust and upper mantle are broken into plates that float and move around on a plastic-like layer of the mantle. Continental Drift is: .

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Pangaea is

Pangaea is:

Large, ancient landmass that was composed of all the continents joined together


Pangaea is

Theory of PlateTectonicsis:

Theory that the Earth’s crust and upper mantle are broken into plates that float and move around on a plastic-like layer of the mantle


Pangaea is

Continental Drift is:

Wegener’s hypothesis that all continents were once connected in a single , large land mass that broke apart about 200

million years ago

and drifted

slowly to their

current positions


Pangaea is

Sea Floor Spreading is:

Hess’s theory that new seafloor is formed when magma is forced upwards toward the surface at the mid-oceanic ridge


Pangaea is

Convection current is:

Currents in Earth’s mantle that transfers heat in Earth’s interior and is the driving force for plate tectonics


Pangaea is

Subsidence is:

Motion of the Earth’s surface as it shifts downward relative to a datum such as sea=level


Pangaea is

Boundary:

Indicates a border


Pangaea is

Convergent boundary is:

Formed when two sections of Earth’s crust is colliding – coming together


Pangaea is

DivergentBoundary is:

Forms where lithospheric plates are moving away from each other.


Pangaea is

Transform Boundary is:

Boundary between two lithospheric plates that are sliding past each other.


Pangaea is

Rift is:

Long crack that forms between tectonic plates

moving apart at

plate boundaries


Pangaea is

Fault is:

Fracture that occurs when rocks change their shape by breaking can form as a result of

compression, being

pulled apart by

shear


Pangaea is

Subduction zone is:

Area in which one lithospheric plate slides under another, occurs at converging plate boundaries


Pangaea is

Ridge is:

A chain of mountains or hills that form as continuous elevated crest for some distance


Pangaea is

Trench is:

Depression in the ground, generally defined by being deeper than they are wide.


Pangaea is

Asthenosphere is:

Plastic-like layer of the Earth on which the lithospheric plates float and move around


Pangaea is

Lithosphere is:

Rigid layer of Earth about 100 km thick, plates moving apart at plate boundaries


Pangaea is

Relief map is:

A physical map showing vertical features with a drawing such as shaded mountains


Pangaea is

Topography is:

Features of a land area caused by differences in elevation.


Pangaea is

Topographic Map is:

A map that shows the shape and elevation of the

land surface using

contour lines, and

shows other land

features using

symbols and colors


Pangaea is

Contour lines are:

On a map, lines that connect point of equal elevation above sea level.


Pangaea is

Elevation is:

Height above average sea level


Pangaea is

Intervals is:

Distance between contour lines on a topographic map


Pangaea is

Benchmark is:

A permanently affixed mark that establishes the exact elevation of a place; used by surveyors in measuring site elevations


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