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What is the definition of Isostacy theory?
IS A CONDITION OF RELATIVE GRAVITational equilibrium between earths lithosphere and asthenosphere
Who is John Pratt?
A mathmatecian who achived many things. He devised a theory of crustal balance which would become the basis for the isostacy principal.
What is isostacy and how does it explain why the earts land masses are not flat?
isostacy refers to equilibrium that exist between part of the crust.in geology the term is used to refer to gravitational equilibrium between lithosphere and asthenosphere. isostacy is explained by isostacy theory that state ;=total mass of the rock in any vertical column of unit cross-section is constant. Two hypothesis are used to explain the earth,that is -principle of mass compensation by J.H Pratt in 1854 -principle of depth compensation by G.B Airy in 1855.
The continents float in the upper mantle due to a form of buoyancy known as?
ISOSTACY, Now do your own Oceanography quiz.
What is meant by isostasy?
the theory of Isostacy is the theory that is used in the movement of the earth,the word itself Isostacy comes from two Greek words:iso meaning equal and Stotikos meaning balance.Therefore Isostacy theory means equal balance or standing.Evidances on the theory of isostacy:presence of Rios and and Esturies in the coastland of Gambia and Sierra leone,Melting of ice sheet and Depression.Effects of the theory of Isostacy:May cause displacement of Lithosphere,Faulting leading to the formation of Block mountains and Rift valleys,foldings,Earth quakes and volcanic eruption.Importances of the theory of isostacy:Understanding the formation of different phenomena,Explain the concept that the crust floats on the mantle,predict future events eg floods,provide precautions to people on the effects of weather.
What are the instruments used by the scientists to measure the isostacy on land?
High precision GPS, synthetic aperture radar (interferometry), and LIDAR.
What is the cause and effect of diatrophism?
theory of diASTROPHISMare:Isostacy's theorycontraction theoryconvection theorycontinental drift theoryexpansion theory
How does isostasy impact the surface of the earth?
Isostacy refers to an equilibrium level maintained by the earths crust on top of the mantle. The theory holds that the weight of the earths crust will displace a certain amount of the underlying mantle, and that an equilibrium is reached whereby the mass of the displaced crust and the mass of the displaced mantle are equal, thus holding that part of the crust at a certain height.
How do isostatic adjustments affect isostacy?
As these isostatic adjustment occur, areas of the crust are bent up and down. This bending cause rock in that area to deform.
Do mountains keep the earth stable from shakes for example during earthquakes?
No ,mountains do not keep earth from shaking ,greatest earthquakes happen around the mountains like in Himalayas also mountains are created by the movement of the tectonic plates which create earthquakes.Just because the mountains are themselves stabilized by isostacy does not mean that the mountains stabilize the earth or the crust by isostacy. Prof David A Young.No self respecting geologists would claim that mountains keep earth from shaking.
How do convention currents help us understand the geologic activity of the earth?
Convection Current helps us understand the geologic activity of the earth because according to the scientist this current causes the movement of the earth's crust due to the unequal temperature that occurs in the mantle (same also with the breezes). Also, it explains that magma come from th mantle which is believed that the melted crust will spitted up again in the earth's surface which it actually explains the (Theory of Isostacy).
Isostacy is the balance between what two forces?
Gravity and buoyancyWhat two forces are balanced when a system is in isostasy?Downward gravity and upward buoyancy
