ficks law of diffusion can be used to calculate the rate of diffusion across gas exchange surfaces. use ficks law of diffusion to explain the adaptation of mammalian gas exchange surfaces.

the principles and empirical processes of discovery and demonstration considered characteristic of or necessary for scientific investigation, generally involving the observation of phenomena, the formulation of a hypothesis concerning the phenomena, experimentation to test the hypothesis, and development of a conclusion that confirms, rejects, or modifies the hypothesis.

your answer is going to be physical weathering