Definitions

Day 2 Definitions

 * Heterogeneous**- consisting of dissimilar elements or parts, completely different; incongruous (having its source or origin outside the organism)
 * Homogeneous**- a uniform structure; the property that if each variable is replaced by a constant time that variable the constant can be factored out (corresponding in structure because of a common origin)
 * Element**- class of substances that cannot be separated into simpler substances by chemical means
 * Compound**- a pure substance composed of two or more elements whose composition is constant
 * Pure Substances**- a sample of matter that is either an element or a compound, that consists of only one component with definite physical and chemical properties and definite composition
 * Mixture**- a combination of two or more substance that are not chemically united and do not exist in fixed proportions to each other (most natural substances are mixtures)
 * Density**- a material is defined as its mass per unit volume
 * Separations**- a parting of space or and interval; the process of being separated
 * Distillation**-evaporation and subsequent collection of a liquid by condensation as means of purification
 * Accuracy**-the extent to which a given measurement agrees with the standard value for that measurement
 * Precision**- the extent to which a given set of measurements of the same sample agree with their mean