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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Large, ancient landmass that was composed of all the continents joined together
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
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
slowly to their
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
Convection current is:
Currents in Earth’s mantle that transfers heat in Earth’s interior and is the driving force for plate tectonics
Motion of the Earth’s surface as it shifts downward relative to a datum such as sea=level
Indicates a border
Convergent boundary is:
Formed when two sections of Earth’s crust is colliding – coming together
Forms where lithospheric plates are moving away from each other.
Transform Boundary is:
Boundary between two lithospheric plates that are sliding past each other.
Long crack that forms between tectonic plates
moving apart at
Fracture that occurs when rocks change their shape by breaking can form as a result of
pulled apart by
Subduction zone is:
Area in which one lithospheric plate slides under another, occurs at converging plate boundaries
A chain of mountains or hills that form as continuous elevated crest for some distance
Depression in the ground, generally defined by being deeper than they are wide.
Plastic-like layer of the Earth on which the lithospheric plates float and move around
Rigid layer of Earth about 100 km thick, plates moving apart at plate boundaries
Relief map is:
A physical map showing vertical features with a drawing such as shaded mountains
Features of a land area caused by differences in elevation.
Topographic Map is:
A map that shows the shape and elevation of the
land surface using
contour lines, and
shows other land
symbols and colors
Contour lines are:
On a map, lines that connect point of equal elevation above sea level.
Height above average sea level
Distance between contour lines on a topographic map
A permanently affixed mark that establishes the exact elevation of a place; used by surveyors in measuring site elevations