Question

_______ is the point where some region of the lithosphere reaches its ultimate elevation and stops rising. A. Orogeny B. Isostatic equilibrium C. Buoyancy D. Isostatic uplift

Answer 1

Answer:The two competing ideas in _______ were formulated by the English mathematicians John Pratt and George Airy.  

Due to the thick and viscous material in the asthenosphere, the liquid is called _______.

_______ is reached when areas of the lithosphere stop rising.

A change in density occurs as a result of _______ compression.

Respond to the following based on your reading.

What happens in the theory of isostasy?

Explanation:answer::plate tectonics

viscoelastic

isostatic equilibrium

asthenosphere

This theory explains how the tectonic plates in the lithosphere able to move freely on the asthenosphere. The lithosphere is less dense than the asthenosphere. There is an equilibrium of the buoyancy between the lithosphere and asthenosphere.

Answer 2

Answer:

B. Isostatic equilibrium

Explanation:

Isostasy is a state of balance or equilibrium between the lithospheric plate and the underlying mantle, the asthenosphere.

Due to the weight of the lithosphere, part of it sinks into the plastic asthenosphere and settles to an equilibrium position. This is what causes changes and differences in elevation on the earth.

As with all natural processes, the earth in itself tries to achieve stability and equilibrium in all it parts. The crust and a portion of the mantle forms the brittle lithosphere. The lithosphere floats on the plastic mantle. Due to density contrast, portions of the lithosphere tends to sink into the mantle from time to time. The lithosphere reaches a point where it no longer sinks and establishes an equilibrium with the asthenosphere.

This isostatic adjustment that occurs within the earth is responsible for the changes in elevations from places to places.

When portions of the crust gets eroded, it becomes lighter and rises up. When materials are deposited in adjacent areas or glaciers forms, they add increasing weight to the crust and causes it to further settle within the asthenosphere.