Make your own free website on Tripod.com

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

Back To: Notebook