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14 Cards in this Set

  • Front
  • Back
ease of flow. the more __ a substance, the less readily it flows
viscous
stony medeorite characterized by presense of small rounded grains or spherules
chondrite
outer rigid shell of Earth that lies above the asthenosphere and below the atmosphere and hydrosphere
lithosephere
the layer of the earth below lithosphere in which isostatic adjustments take place. rocks here are deformed readily and flow slowly
asthenosphere
1- mantle from base of asthenosphere to top of core (ie, below asthen.) 2- atmosphere layer above stratosphere and below thermosphere
mesosphere
external forces acting on masses or along surfaces, forces include shear, tension, and compression
stress
change in form or size of a body due to external forces
strain
behavior of material where stress cuases deformation that is recoverable- when stress stops, material returns to its original state
elastic
behavior of material where stress causes permanent flow or strain
ductil
behavior of material where stress causes abrupt fracture
brittle
behavior of a material that flows as a fluid (liquid) over time, but is strong (solid) at a moment in time
plastic
stress difference @ which permanent deformation 1st occurs
yield stress
condition of flotational equilibrium wherein the Earth's crust floats upward or downward as loads are removed or added
isostasy
measure of water volume where 1 acre of surface is covered 1 foot deep. An acre is about 90 % of the area between goal lines on a football field
acre foot