Chapter 2 Flashcards
meter
the base unit of length in the metric system
gram
base unit of mass in the metric system
mass
measure of the total quantity of matter in an object
- constant
weight
is a measure of the force exerted on an object by the pull of gravity
liter
base unit of volume in the metric system
exact number
has a value that has no uncertainty associated with it
- it is known exactly
- definition
- counting
- simple fractions
inexact number
has a value that has a degree of uncertainty associated with it
- results anytime a measurement is made
- impossible to make an exact measure
significant figures
digits in any measurement that are known with certainty plus one digit that is uncertain
density
the ratio of the mass of an object to the volume occupied by that object
D = M/V
calorie
the amount of heat energy needed to raise the temperature of 1 gram of water by 1 degree celsius
which is the measurement systems prefered by scientists?
metric system
how is the decimal system related?
related by factors of 10
what are the units in the metric system?
Gram (mass)
liter (volume)
meter (length)
what is a method to solve general problem in which the units associated with numbers are used as a guide in setting up calculations?
dimensional analysis
what are the three temperature scales
Fahrenheit
Celsius
Kelvin
