Metric System & Scientific Notation

Metric System Standardized measurement system used in Science Decimal based = conversions between units of different magnitudes are accomplished by shifting the decimal point or changing an exponent All multiples and divisions of the decimal units are factors of the power of ten The US is the only industrialized country that does not use this system as its official system of measurement, still using the Imperial System ?!?

Units to Know UNITSYMBOLWHAT IT MEASURES metermlength gramgmass LiterLvolume Celsius˚Ctemp secondsstime

Scientific Notation a way of writing numbers that are too large or too small to be conveniently written in standard decimal notation Based on significant figures Here are some examples: = 1 x = x = 1 x = x = 1 x = 4.82 x = 1 x = 8.9 x 10 1 (not usually done) 1 = /10 = 0.1 = 1 x = 3.2 x (not usually done) 1/100 = 0.01 = 1 x = 5.3 x /1000 = = 1 x = 7.8 x /10000 = = 1 x = 4.4 x 10 -4

Scientific Notation Kept some simple rules in mind. 1.Starting with numbers Rule: Numbers greater than 1 move the decimal to the left exponent is positive 7354 = x 10 3 Rule: Numbers less than 1 move the decimal to the right exponent is negative = 7.8 x Starting with notations Rule: Numbers greater than 1(positive exponent) move the decimal to the left x 10 3 = 7354 Rule: Numbers less than 1 (negative exponent) move the decimal to the right 7.8 x =

Prefixes to Know

Many, many, more… the scale continues…