Test 1: Math & Chemistry Flashcards
Qualitative
quality-based, such as color, physical state
Quantitative
measurement of an amount or quantity
scientific notation is the method scientists use to
handle large and small numbers
Scientific notation is done by splitting up the number into what two parts?
the numerical value, and the factor of 10 by which it is multiplied (1000 is 1x10^3)
The power listed in scientific notation is done by counting the number of __ following the initial #
zeroes
If the power listed in scientific notation is negative, it describes
the total number of digits that come after the decimal. (.001 is 1x10^-3)
Prefix for billion
giga- (G), 10^9
Prefix for million
10^6, mega- (M)
Prefix for thousand
10^3, kilo (k)
Prefix for trillionth
10^-12, pico(p)
Prefix for hundredth
10^-2, centi- (c)
Prefix for thousandth
10^-3, milli- (m)
Prefix millionth
10^-6, micro- (u/m)
Prefix for billionth
10^-9, nano- (n)
What are the two parts of all quantitative measurements?
number and unit
The units of mass are
gram, pound, ounce, atomic mass unit (amu)
The units of length are
meter(m), inch, foot, yard(yd), mile(mi)
The units of time are
second(s)
The units of temperature are
kelvin(K), Celsius (degreeC), fahrenheit (degreeF)
Volume is found by
width x depth x height
Density =
Density = Mass/Volume
For solid objects that are not perfect cubes, measurement of volume can be done by
measuring the difference in volume when the solid object is added to a fixed amount of water
Prefix for trillion
Tera- (T), 10^12
Prefix for unit
1x10^0
Ascending metric system prefixes
Kilo, mega, giga, tera (kindness means giving thanks)
Descending metric system prefixes
Centi, milli, micro, nano, pico (caring moms make nice people)
Exact numbers are those that are part of a __
defined relationship
Our ability to measure is limited by
a) what we are measuring and b) what tools we are using to measure it.
Standard deviation
deviation from the mean – margin of error
Precision
How close a measured number is to another measured number. (Repeatable)
The more significant digits a measurement has, the more___ that measurement is.
precise
Accuracy
How close a measured number is to a value. Degree consistent with reality
When giving measurements, it is considered a best practice in the medical field to drop
all trailing zeroes
Every method of measuring has a ___ to the level of detection possible
real limit
Metric unit used to measure volume is
liter
