Chemical and Physical Changes, Mixtures, and Substances

This set of flashcards covers key concepts related to chemical and physical changes, properties of substances, and classifications of mixtures.

Chemical change

A process where substances undergo a transformation that alters their chemical composition.

Physical change

A change that affects one or more physical properties of a substance without altering its chemical composition.

Heterogeneous mixture

A mixture in which the composition is not uniform throughout.

Homogeneous mixture

A mixture that has a consistent composition throughout.

Pure substance

A material composed of only one type of particle.

Extensive property

A property that depends on the amount of matter in a sample.

Intensive property

A property that does not depend on the amount of matter present.

Flammable

Capable of catching fire easily.

Malleable

A physical property of metals that allows them to be hammered or pressed into shapes without breaking.

Soluble

Able to dissolve in a solvent, typically water.

Evaporation

The process of turning from liquid into vapor.

Digestion

The chemical breakdown of food in the body.

Rusting

A chemical change where iron reacts with oxygen to form iron oxide.

Souring milk

A chemical change due to the fermentation of lactose.

Reactants

Substances that undergo a chemical change in a reaction.

Products

Substances formed as a result of a chemical reaction.

Density

The mass per unit volume of a substance, an intensive property.