measurement. scientific measurment scientists use a common system of units called the international...

MEASUREMENT

SCIENTIFIC 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.

LENGTH

• SI Unit – meters• Abbreviation – m• Tool used to measure – meter stick

MASS

• SI Unit – kilogram• Abbreviation - kg• Tool used to measure - balance

TIME

• SI Unit – seconds• Abbreviation - s• Tool used to measure - stopwatch

VOLUME• FOR LIQUIDS• SI Unit – liters• Abbreviation - L• Tool used to measure – graduated cylinder

• FOR SOLIDS• SI Unit – cubic centimeters• Abbreviation – cm3

• Tool used to measure – meter stick• Length x width x height• 1 cm3 = 1 mL

TEMPERATURE

• SI Unit – kelvin or celcius• Abbreviation – K of C• Tool used to measure – thermometer

• °C + 273 = K• Boiling Point of Water• 212°F=100°C=373 K• Freezing Point of Water• 32°F=0°C=273 K

VOLUME

• To 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.

CONVERSIONS

King Henry Drank Dark Chocolate Milk

Decimal Moves

EXAMPLE

•1 m = .1 dkm = .01 hm = .001 km

•1m = 10 dm = 100 cm = 1000mm

GRAPHS

SIGNIFICANT FIGURES• The significant figures of a measure show the

precision that you know for sure• When 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 significant• Zeros to the right of a significant figure on the

right of a decimal are considered significant• Zeros to the right of a significant number with no

decimal are not significant

SIGNIFICANT FIGURE EXAMPLES

• .000234•1.0027•5600•5.3200•7.990099

•3•5•2•5•7