Instructions: In this task you will be given a text passage from a trivia quiz. You should choose the category this question belongs to from these categories: History, Science, Social Science, Fine Arts, Literature. You can only choose one category, so if in doubt, please choose the closest match.
Input: A thermal form of process can be seen in a mixed gas through the Soret effect, while another form involving momentum can be observed in the laminar flow of a liquid across a solid surface. When semiconductors are produced, certain layers are sometimes doped via this process, although ion implantation is typically preferred.The most commonly observed form of the phenomenon can be described by a law which shows that flux is proportional to the concentration gradient and in the direction of lower concentration, Fick's law. FTP, name this form of passive transport that involves spontaneous movement of particles from a higher concentration to a lower concentration.
Output:
Science