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chapter b1 science t

earths crust test on tuesday

Crust the thin layer of earth
magma the hot molten rock deep inside earth
magnetic fields The space around a magnet within which the force of the magnet is exerted the magnet attracted all the iron filiings within its magnetic field
magnetic reversal the swiching or changing of earths magnetic pole such that the north magnetic pole position and vice versa scienctist have found evidenve of magnetic reversals in layers of rock along the ocean floor
Mantle the middle layer of earth
Mid ocean ridge a chain of mountains under the ocean
Pangea A super contintent that existed about 200 million years ago
Plate one of the slabs that make up earths crust and upper mantle
plate boundary a place plate that make up earths crust and upper mantle either move together or apart or else move past one another
Sea floor speading the process by which new ocean floor is continually being formed as magma rises to the surface and hardens into rock
Sonar Sound navigation and ranging
Lithosphere solid rocky layer of earth
Convection currents the partaking which the energy is transferred
asthenosphere the layer of earth below the lithosphere is not rigid
colliding plates plates collide or come together at onvergent boudaries
separating plates plates move away from one another at divergent boundaries
Theory of plate tectonics earths crust and upper mantle are made up of a series of rigid or nearly rigid plates that are in motion
sliding plates plates move past one another at transform fault boundaries
Folded mountains these form when two tectonic plates collide
fault block mountains large crack in the earth masses of rock move up or down along a fault
pikes peak dome mountain
dome mountains The surface is lifted up by magma forming a broad dome or bulge.wind and rain erode the dome stripping away layers of sedimentary rock and exposing the igneous rock below
volcanoes fourth type of mountains are common along convergent and divegent plate boundaries
Mountains pb45,47,48
interaction of plates coming together moving apart sliding past
Plates pb40,41
Created by: dance11