porosity
~ The Volume of Void Space Divided by the Total Volume
permeability
~ The ability of fluid to flow through a porous solid
Rotary or Percussion Drilling
~ Drill through soil or rock, grinding material to sand
seismology
~ The study of earthquake waves
seismographs
~ Instruments tha...
✓✓✓✓~ Earth's Cool, Solid and Brittle CRUST is ___ thick below oceans and ___ thick on
the continents
Oxygen, Silicon, Aluminum, Iron, Calcium,Magnesium, Sodium, Potassium, and
many other elements in small amounts
✓✓✓✓~ The crust is composed of mainly:
the Lithosphere
✓✓✓✓~ "the" ___ is below the Crust.It is a more ductile solid and is chemically different:
Oxygen, Silicon, Magnesium, IronTotal Thickness (including crust):5-100km thick
under oceans150-250km thick under continents
Asthenosphere, Upper Mantle
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