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