Analyzing Data Flashcards
Base Units
A defined unit in a system of measurement that is based on an object or even in the physical world and is independent of other units.
Second
the SI base unit for time
Meter
The SI base unit for length
Kilogram
The SI base unit for mass
Kelvin
The SI base unit of temperature
Derived unit
A unit defined by a combination of base units
Liter
The metric unit for volume equal to one cubic decimeter
Density
The amount of mass per unit volume; a physical property
Scientific notation
expresses any number as a number between 1 and 10 (known as a coefficient) multiplied by 10 raised to a power (known as an exponent)
dimensional analysis
A systematic approach to problem solving that uses conversion factors to move from one unit to another.
conversion factor
A ratio of equivalent values used to express the same quantity in different units; is always equal to 1 and changes the unit of a quantity without changing its value.
accuracy
refers to how close a measured value is to an accepted value
precision
refers to how close a series of measurements are to one another; precise measurements show little variation over a series of trails but might not be accurate.
error
the difference between an experimental value and an accepted value
percent error
the ratio of an error to an accepted value.
