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Metric System & SI System. The standard for measurement in the scientific community today is the metric system. We use the metric system for 3 reasons: Easy and convenient because it is universal The rest of the world has been using it for the past 40 years

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the standard for measurement in the scientific community today is the metric system
The standard for measurement in the scientific community today is the metric system.

We use the metric system for 3 reasons:

  • Easy and convenient because it is universal
  • The rest of the world has been using it for the past 40 years
  • conversions between units are easy, because everything is done in multiples of ten.
  • 10, 100, 1000, 10000, etc. YOU FINISH!
the si system was adopted by the scientific community around 1960
The SI system was adopted by the scientific community around 1960.
  • The SI system has seven base units one for each of the following:
  • length meter
  • mass kilogram
  • time second
  • electric current ampere
  • temperature Kelvin
  • amount of substance mole
  • luminous intensity candela
slide4

The metric system tells how many,

And

the SI system tells us of what!

length the meter is the unit for length we will always use the meter when discussing length
-Length-The meter is the unit for length. We will always use the meter when discussing length.
  • 1km- 5 city blocks 1000m
  • 1m floor to doorknob
  • 1dm grapefruit .1m
  • 1cm button .01m
  • 1mm width of dime .001m
  • 1m bacteria cell diameter .000001m
  • 1nm thickness of RNA .000000001m
slide6

-volume-Volume is the space occupied by matter. The SI unit for volume is meter cubed. The common unit of measure is the Liter. 1 liter = 1000 centimeters cubed.volume is dependent on temperature. (ex. ice)

1L a quart of milk

1mL 20 drops of water .001L

1cm cube of sugar .001 L

1L crystal of salt .000001 L

slide7
-Mass-
  • Mass- quantity of matter an object containsWeight- measure of the pull of gravity of the earth on an object.
  • Mass  Weight
  • Mass is measured in grams. The SI unit of mass is the kg. A kilogram is the mass of one liter of water at 4C.
slide8

1kgsmall textbook 1000g

  • 1g dollar bill
  • 1mg10 grains of salt .001g
  • 1g particle of baking powder .000001g