Teacher: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.
Teacher: Now, understand the problem? Solve this instance: Couette shear cells can be used to study cube, sponge, and laminar transitions of solutions of this type of substance. CTAB, an example of this substance, is used to make genomic preps from Arabidopsis, and type II alveolar cells secrete this type of substance. They can be used to increase the miscibility of other substances, and some common laboratory examples include Igepal and sodium dodecyl sulfate. For ten points, name this class of compounds that lower the surface tension of a liquid, whose name is a portmanteau of "surface-acting agent".
Student:
Science