#### International System of Units (SI) - The Metric system

International System of Units (SI) - Metric
1. Length -- meter (m)
2. Mass -- kilogram (kg)
3. Time -- second (s)
4. Temperature -- Kelvin (K)
5. Amount of Substance -- mole (mol)
6. Electric Current -- ampere (A)
7. Light Intensity -- candela (cd)
8. Electric Charge -- Coulomb (C)
9. Sound Intensity -- Decibel (dB)
10. Power -- Watts (W)
11. Energy -- Joule (J)
Prefixes
1.  mega-  M          2.  kilo-  k               3.  hecto-  h           4.  deca-  da
5.  deci-  d              6.  centi-  c             7.  milli-  m              8.  micro-  µ

Proper Use of te SI System of Measurement
1.  75 cm (not 75cm) --  leave a space between the last digit and the unit.
2.  1.36 m (not 1.36 m.)  --  don't put a period after the unit unless it is at the end of the sentence
3.  6 m (not 6 meters);  six meters (not six m)  --  use numbers and symbols together only!!
4.  0.25 cm (not 1/4 cm)  --  use decimal fractions instead of fractions
5.  0.67 mm (not .67 mm)  --  put a zero in front of a decimal if the number is less than 1