Chapter 2 - Measurements Flashcards
Significant Figures
1 all non-zeros
2 interior zeros
3 trailing zeros (after a decimal)
4 trailing zeros (before a decimal)
Non-Significant Figures
1 leading zeros
2 trailing zeros after a nonzero but before an implied decimal are AMBIGUOUS
SI System
International System of Units
-system for science measurements based on the metric system
SI base units
M - meters- length
kg - kilogram - weight
s - seconds - time
K - kelvin - temp
Mass
a measure of the quantity of matter within it
- vs the weight of an object that is based on the gravitational pull
Derived Units
- formation of other units
- ex any unit of length when cubed becomes a volume
Measurements
- quantitative observations
- contains a numerical value and a unit
- in every measurement, the last number is an estimate
10 to 1 power
10
10 to 0 power
1
10 to -1 power
0.1
10 to - 2 power
0.01
Density
density of a substance is the ratio of its mass to its volume
density formula
d = m/V
VOLUME
1 CC (cubic centimeter)
1CM to the power of 3
1mL
10^18 to base
Exa Peta Tera Giga Mega Kilo Hecto Deka -base-
base to 10^-18
deci centi mili micro nano pico femto atto
1g = __exagram
10^ -18 exa
1g = __petagram
10^ -15 peta
1g = __teragram
10^ -12 tera
1g = __gigagram
.000 000 001 giga
1g = __megagram
.000 001 mega
1g = __kilogram
.001 kilo
1g = __hectogram
.01 hecto
1g = __dekagram
.1deka
1g = __decigram
10 deci
1g = __centigram
100 centi
1g = __miligram
1,000 mili
1g = __microgram
1,000,000
1g = __nanogram
10^9
1g = __picogram
10^12
1g = __femtagram
10^15
1g = __attogram
10^18
