Chemistry 1405 - Wingo; Chapters 1-4

A theory stating that all matter is composed of tiny particles called atoms.

The science that seeks to understand the behavior of matter by studying what atoms and molecules do.

A procedure that makes use of observable predictions to test a theory.

A theory before it has become well established; a tentative explanation for an observation or a scientific problem that can be tested by further investigation.

A law stating that in a chemical reaction, matter is neither created nor destroyed.

The first step in the scientific method. An observation must measure or describe something about the physical world.

A statement that summarizes past observations and predicts future ones. Scientific laws are usually formulated from a series of related observations.

The way that scientists learn about the natural world. The scientific method involves observations, laws, hypotheses, theories and experimentation.

A proposed explanation for observations and laws. A theory presents a model of the way nature works and predicts behavior that extends well beyond the observations and laws from which it was formed.

A factor used to convert between two separate units; a conversion factor is constructed from any two quantities known to be equivalent.

One part of a number expressed in scientific notation.

A fundamental property of materials that differs from one substance to another. The untis of density are those of mass divided by volume, most commonly express in g/cm^3, g/mL or g/L.

A unit system commonly used in the US.

A number that represents the number of times a term is multiplied by itself. For example, in 2⁴ the exponent is 4 and represents 2 x 2 x 2 x 2.

One part of a number expressed in scientific notation; it represents the number of places the decimal point has moved.