User:Dlee104

Daniel Lee 10.22.08 Chemistry EXTRA CREDIT 2.1 1. Physical change- a change in state or shape that does not alter the identity of the material. Ice melting, flour ground from wheat, sugar dissolved in water. Chemical change- a change in the composition of the particles of a material that alters the identity of the material. Metal rusting, oil burning, wood rotting, food being digested. 2. heterogeneous mixtures – a mixture composed of two or more one distinctly separate phases that have their own properties. Homogeneous mixture- a mixture existing in only one distinctly separate region with its own properties. 3.