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E C M

elements compounds and mixtures

QuestionAnswer
A sample of matter that has definite chemical and physical properties. element
Pure substance composed of two or more different elements joined by chemical bonds. compound
A combination of two or more pure substances that are not chemically combined. mixture
mixture of different and easily distinguishable materials heterogeneous mixture
contains two or more gaseous, liquid, or solid materials blended evenly homogeneous mixture
a mixture that appears to have the same composition throughout solution
heterogeneous mixture with particles that never settle. colloid
the scattering of light. colloids scatter light Tyndall Effect
heterogeneous mixture containing a liquid in which visible particles settle. ex.-pond water suspension
characteristics of a material which can be observed without changing the identity of the substance in the material physical property
color, shape, size, melting point,density,magnetism, viscosity, ductility, and malleability Examples of physical properties
change in a substance's size, shape, or state of matter physical change
characteristics of a substance indicating that it can change chemically;flammability, reactivity, and light sensitivity chemical property
burning of wood, hydrogen perioxide decomposing in the presence of light examples of chemical changes
when one substance changes into another chemical change
temperature change, smell, or bubble formation, production of odor, precipitate chemical change indicators
big rocks split into smaller ones; erosion by rivers and streams physical weathering of earth's surface
calcium carbonate in limestone changes into calcium hydrogen carbonate due to acid rain chemical weathering of earth's surface
Mass of all substances present before a chemical reaction equals the mass of all the substances after the change. Law of Conservation of Mass
Created by: klaud