International System of Units
Purpose fo the SI
Provides uniformity for units used in science.
Length, 39.4 inches just longer than a yard
1/100 of a meter or 2.54 cm to an inch.
Volume, slightly larger than a quart or 1.06 quart.
Weight, 1000g = 1kg = 2.20 lb
Temperature, 0c = 32f = freezing; 100c = 212f = boiling.
Lowest obtainable temperature is 0K, Kelvin (K)
metric = meter (m)
SI= meter (m)
metric = liter (L)
SI = Cubic Meter (m^3)
a method of writing very large or very small numbers by using powers of 10
Two parts of scientific notation:
Coefficient and power of ten.
Numbers obtained from a measurement that have some degree of uncertainty or error.
The digits in a measured number that include all certain digits and the first uncertain digit.
numbers that have no uncertainty; numbers from defined relationships, counting numbers, and numbers that are part of reduced simple fractions.
T 1,000,000,000,000 or 10^12
G 1,000,000,000 or 10^9
M 1,000,000 or 10^6 note the use of upper case"M" for mega while a lower case "m" for mili
k 1,000 or 10^3
d 0.1 or 10^-1
c 0.01 or 10^-2
m 0.001 or 10^-3 note the lower case "m" for mili where as mega uses upper case "M"
μ 0.000001 or 10^-6
n 0.000000001 or 10^-9
p 0.000000000001or 10^-12
Every equality can be written in the form of a fraction, in which one of the quantities is the numerator and teh other is the denominator.
Density of solids and liquid is generaly expressed as:
grams per cubic centimeter, or g/cm^3
Density of gases is usually expressed as:
grams per liter, or g/L
ratio of a mineral's weight compared with the weight of an equal volume of water.