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25 terms

earths interior

scince flash cards
STUDY
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core
the dense metallic center of the earth
asthenosphere
a plastic or flowing layer within the earths core
crust
the brittle rocky outer layer of the earth
magnetosphere
ther outer part of the earths magnetic field
mantle
the thick middle layer in the solid part of earth
nickel
a specific type of metal
observation
an act of nothing or occurence
lithosphere
the rigid layer of earth that includes the crust and the upper most mantel
two methods
mines and wells,earthquake waves
temp of geosphere
temp increases pressure increases
continental
less dense and much thinner than others has no water,granite,brittle,rocky
oceanic
made of dense,rocks,iron magnisium under water
rock cycle
An idealized cycle of processes undergone by rocks in the earth's crust
convection
Heat transfer in a gas or liquid by the circulation of currents from one region to another. b. Fluid motion caused by an external force such as gravity
therory of continental drift
Continental drift is the movement of the Earth's continents relative to each other
pangaea
a hypthetical super content that included all the land masses of Earth before the triassic.
alfred wegener
a German scientist, a geophysicist, and a meteorolotist.
seafloor spreading
occurs at mid-ocean ridges, where new oceanic crust is form through volcanic activity, and then moves away
mid-ocean ridge
a series of mountain ranges on the ocean floor.
rift
a narrow fissure in rock
vent
an opening that allows air, gas, or liquid out or into a confinded space.
theory of plate tectonics
the theory of Earth's outter layer is made up of plates witch have moved through out Earth's history
convergent boundary
they push together and cause mountains.
divergent boundary
places where plates are coming apart
transform boundary
is where two plates slide against each other in a side ways motion