AP Biology (Khan Academy)

Khan Academy's lesson summaries' key terms

polar molecule

neutral (uncharged) molecule that has an asymmetric internal distribution of charge, resulting in partial positive and negative ends.

cohesion

attraction of molecules for molecules of the same kind

adhesion

attraction of molecules for molecules of a different kind

density

mass per unit volume of a substance

specific heat capacity

amount of heat needed to raise temp of one gram of a substance by one degree C

heat of vaporization

amount of energy needed to change 1 gram of a liquid to a gas at constant temp