SI Units• International System of Units• Helps to maintain consistency in

reporting measurements

Mass

Volume

Length

Mass• Mass is measured in grams (g)– The standard unit of mass in the metric

system is the gram.– Other units of mass and their

equivalents in grams are as follows:1000 milligrams (mg) = 1 g100 centigrams (cg) = 1 g10 decigrams (dg) = 1 g1 hectogram (hg) = 100 g1 kilogram (kg) = 1000 g

Mass is measured using a scale

Volume• Volume is measured in liters (L)• The standard unit of volume in the

metric system is the liter– Other units of volume and their equivalents

in liters are as follows:1000 milliliters (mL) = 1 L100 centiliters (cL) = 1 L10 deciliters (dL) = 1 L1 hectoliter (hL) = 100 L1 kiloliter (kL) = 1000 L

Volume can also be measured in cubic centimeters

1 cm³ = 1 mL

Volume can be measured using graduated cylinders, beakers, Erlenmeyer flasks or pipettes

Length• Length is measured in meters (m)• The standard unit of length in the metric

system is the meter– Other units of length and their equivalents

in meters are as follows:1000 millimeters (mm) = 1 m100 centimeters (cm) = 1 m10 decimeters (dm) = 1 m1 hectometer (hm) = 100 m1 kilometer (km) = 1000 m

Length can be measured with a meter stick or ruler