Rheology is best described as the study of
a. the flow of matter
b. the earth���s crust
c. magma
d. the earth���s core

The right option is; a. the flow of matter

Rheology is best described as the study of the flow of matter.

Rheology is the branch of physics that studies the deformation and flow of matter (liquid, solid, and gas) but usually in a liquid state. Rheology grouped liquids into two classes which are; Newtonian fluids and Non-Newtonian fluids. The Newtonian fluids are the fluids that conform to Newton's theory, and are said to be perfectly viscous while the non-Newtonian fluids, are the fluids that do not conform to Newton's theory. The Newtonian fluids have a constant ratio between their shear rate and shear stress while the non-Newtonian fluids do not have a constant ratio between their shear rate and shear stress.

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