AP Chemistry 4.1 and 4.2 Vocabulary

Matter

Material that occupies space and contain mass

Homogeneous mixture

Visibly indistinguishable parts

Heterogeneous mixture

Visibly distinguishable parts

Pure substance

Substance with one constant composition

Compound

A substance with constant composition that can be broken down into elements by chemical processes

Element

Substance that cannot be decomposed into simpler substances by chemical or physical means

Physical change

Physical property of a substance changes without changing the composition

Solid

particles are packed, giving a definitive shape and size

Liquid

Particles are close together, but can move. Definitive volume and fluid shape

Gas

Particles may occupy entire volume of container, shape and volume defined by container

Separation of mixtures

Distillation (boiling points), filtration (size or chromatography)

Deformation

Cutting, denting, tearing, stretching, etc

Chemical change

Precipitate, color change, light, change in temperature, sounds, production of a gas, formation of new substance