Extra Credit

Chemical Change

A change that alters the identity of a substance resulting in a new substance or substances with different properties.

Chemical Property

A characteristic of a substance that is observed in a chemical reaction (corrosion, toxicity, flammability).

Chemical Reaction

A chemical change that occurs when two or more substances combine to form a new substance.

Production

The creation or formation of something.

Precipitate

A solid separated from a solution (liquid).

Endothermic

A chemical reaction that absorbs heat from the environment.

Exothermic

A chemical reaction that releases heat into the environment.

Physical Property

A characteristic of a substance that can be observed or measured without changing the identity of the substance.

Thermal Energy

The kinetic energy of the particles in a substance. Heat is the flow of thermal energy.

Element

A pure substance composed of the same type of atom throughout.

Atom

The smallest particle of an element made of protons, neutrons, and electrons.

Compound

A pure substance made of 2 or more elements chemically combined in fixed amounts.

Periodic Table

A table in which all the known elements are arranged by properties and are represented by 1 or 2 letters, referred to as chemical symbols.

Malleability

The ability of a substance to be hammered without breaking.

Luster

The shiny quality of a substance that reflects light.