2Scientific Measurment Scientists use a common system of units called the International System of Units.This can be abreviated “SI Units”This allows scientists to share information more easily.
3Length SI Unit – meters Abbreviation – m Tool used to measure – meter stick
4Mass SI Unit – kilogram Abbreviation - kg Tool used to measure - balance
5time SI Unit – seconds Abbreviation - s Tool used to measure - stopwatch
6Volume FOR LIQUIDS SI Unit – liters Abbreviation - L Tool used to measure – graduated cylinderFOR SOLIDSSI Unit – cubic centimetersAbbreviation – cm3Tool used to measure – meter stickLength x width x height1 cm3 = 1 mL
7Temperature SI Unit – kelvin or celcius Abbreviation – K of C Tool used to measure – thermometer°C = KBoiling Point of Water212°F=100°C=373 KFreezing Point of Water32°F=0°C=273 K
8VolumeTo find the volume of an iregular solid use the displacement method.First measure the volume of liquid in a beaker.Place the irregular object into the liquid.Measure the new volume of the liquid.Subtract the first volume from the second.The difference between the two is the volume of the irregular solid.
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10Example1 m = .1 dkm = .01 hm = .001 km1m = 10 dm = 100 cm = 1000mm
12Significant FiguresThe significant figures of a measure show the precision that you know for sureWhen working a problem, you can only have as many significant figures as your lowest significant figure in the answer.All non-zero numbers are considered to be significant.Zeros between two significant numbers are considered to be significantZeros to the right of a significant figure on the right of a decimal are considered significantZeros to the right of a significant number with no decimal are not significant