Metric System. In science, we deal with some very LARGE numbers: 1 mole = 602000000000000000000000...
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Metric System. In science, we deal with some very LARGE numbers: 1 mole = 602000000000000000000000 In science, we deal with some very SMALL numbers: Mass
In science, we deal with some very LARGE numbers:1 mole =
602000000000000000000000In science, we deal with some very SMALL
numbers:Mass of an electron = 0.000000000000000000000000000000091
kgScientific NotationScientific Notation:A method of representing
very large or very small numbers in the form: M x 10n M is a number
between 1 and 10 n is an integer2 500 000 000Step #1: Insert an
understood decimal point.Step #2: Decide where the decimal must end
up so that one number is to its leftStep #3: Count how many places
you bounce the decimal point123456789Step #4: Re-write in the form
M x 10n2.5 x 109The exponent is the number of places we moved the
decimal.0.0000579Step #2: Decide where the decimal must end up so
that one number is to its leftStep #3: Count how many places you
bounce the decimal pointStep #4: Re-write in the form M x
10n123455.79 x 10-5The exponent is negative because the number we
started with was less than 1.4 x 106x 3 x 106Multiply the front
numbers then add the exponents12 x 10121.2 x 1013Move the decimal
behind the first number1.2 x 109 3 x 104Divide the front numbers
then subtract the exponents0.4 x 1054 x 104Move the decimal behind
the first numberSI SystemStandard International System of
measurement metricsHas seven base units and many other units
derived from these seven
Seven Base Units
Mass vs WeightMass is not the same as weightMass is the amount
of matter in a substanceWeight is a measure of the pull of gravity
on the substanceCan you be weightless? Can you be massless?
Derived UnitsMany other units are used in the metric system, but
they are combinations of the base unitsSpeed - meter per sec
(m/sec)Volumevolume = length x width x height (m) x (m) x (m) =
m3.001 m3 = 1 liter (L) 1 cm3 = 1ml
PrefixesMetric system utilizes prefixes which indicate multiples
of 10 of the unit kilo- k1000 hecto- h 100 deka- da 10 deci- d .1
centi- c .01 milli- m .001
Converting Between Metric Units 3.65 dam = __________cm 2587 mm
= __________hm .0087 hl = __________cl
More Prefixes
Use the appropriate prefixes 3 x 106 L15 x 10-9 g8 x 108 m3.5 x
10-6 A1.46 x 1010 JTemperatureMetric unit Kelvin not used for
measurementMeasured in C (celsius) K = C + 273.15Old system is F
(farenheit) C = 5/9 (F -32)What is 69 F in C and K? 19
