314 Biology: Appendix E: Measurements
textbook page 893
Scientists measure: Systeme Internationale d Unites International System of Units
Modified SI used in France and is common system used throughout the world today.
Four units:
Meter length
Kilogram mass
Kelvin temperature
Second time
All other units are derived from the above units.
Some of the units will be used in the experiments we do in class.
Length:
1 kilometer ( km ) = 1000 meters
1 hectometer ( hm ) = 100 meters
1 dekameter ( dkm ) = 10 meters
1 meter ( m )
1 decimeter ( dm ) = 0.1 meter
1 centimeter ( cm 0 = 0.01 meter
1 millimeter ( mm ) = 0.001 meter
1 micrometer ( m m ) = 0.000001 meter
1 nanometer ( nm ) = 0.000000001 meter
Mass:
1 kilogram ( kg ) = 1000 grams
1 hectogram ( hg ) = grams
1 dekagram ( dkg ) = grams
1 gram ( g )
1 decigram ( dg ) = grams
1 centigram ( cg ) = grams
1 milligram ( mg ) = grams
1 microgram ( m g ) = grams
1 nanogram ( ng ) = grams
Volume:
1 kiloliter ( kL ) = 1000 liters
1 hectoliter ( hL ) = 100 liters
1 dekaliter ( dkL ) = liters
1 liter ( L )
1 deciliter ( dL ) = liter
1 centiliter ( cL ) = liter
1 milliter ( mL ) = liter
Temperature:
Molarity ( M ) measures the concentration of a dissolved substance in a solution.
High molarity indicates high concentration