ISP 203B Exam 1 – Rooney Questions With
Solutions
the earths magnetic field is formed by.... convective movement of the outer liquid core
how does the circulating outer core generate a magnetic field... the magnetic field of the
earth is produced by electromagnetic induction due to motion o...
the earths magnetic field is formed by.... convective movement of the outer liquid core
how does the circulating outer core generate a magnetic field... the magnetic field of the
earth is produced by electromagnetic induction due to motion of the outer core
core of earth is made of _______, capable of inducing more magnetic field iron
the oldest oceanic crust about 180 million years old is found where? next to continents
and along subduction zones
shape of seismic wave is controlled by _______ geology
volcanoes are mainly near place boundaries, what are the three? -divergent
-transform
-convergent
, ISP 203B Exam 1 – Rooney Questions With
Solutions
most earthquakes are long the what? major tectonic plate boundaries
what are the major plate boundaries? -spreading centers @ oceanic ridges
-collision zones on continents or oceanic trenches
-transform faults
what direction is the pacific plate currently moving based on the chain of hawaiian island with
only earnest island active? to the northwest
crustal topography means what? continents stand higher
paleomagnetism earth's frozen-in magnetism, iron particles orient to the magnetic field,
crustal age
how old is the oldest rock on the oceanic floor? 200 million years
stationary ____________ in deep mantle burns a track in moving overlying plate hot spot
, ISP 203B Exam 1 – Rooney Questions With
Solutions
moho boundary marked by increase in seismic velocity
earth's crust is how thick? 7-70 km thick - fairly thin
earth's mantle is how thick? 2900 km thick - 80% of earth's volume
earth's core liquid outer/solid nickel-iron inner, very dense, temperature of -6000 degrees
celsius
lithosphere strong "plate" later crust and upper part of mantle, relatively cool and brittle
asthenosphere weak layer, small amount of melt, weak, plastic behavior
peridotite rock under crust that makes up mantle
lithosphere _________ on asthenosphere floats
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