PS: Ch.1 Vocab

A determination of the amount of something. It has two parts: a value and a unit.

• precision

• measurement

• unit

• length

A fixed amount of something like a centimeter (cm) of distance.

• measurement

• accuracy

• meter

• unit

How close a measurement is to an accepted or true value.

• graph

• light year

• accuracy

• precision

Describe how close together or reproducible repeated measurements are.

• precision

• inverse relationship

• conversion factor

• accuracy

Refers to the smallest interval that can be measured.

• length

• graph

• distance

• resolution

The amount of space between two points.

• length

• distance

• meter

• precision

A measured distance.

• resolution

• length

• distance

• meter

A basic SI unit of length.

• unit

• resolution

• distance

• meter

The distance that light travels through space in one year. One unit is equal to 9.46 X 10^12 km.

• light year

• galaxy

• conversion factor

• accuracy

A ratio that has a value of one and is used when setting up a unit conversion problem.

• significant digits

• independent variable

• direct relationship

• conversion factor