Science Applications

Measure in SI

The metric system of measurement was developed in 1795. A modern form of the metric system, called the International System (SI), was adopted in 1960 and provides the standard measurements that all scientists around the world can understand.

The SI system is convenient because unit sizes vary by powers of 10. Prefixes are used to name units. Look at Table 3 for some common SI prefixes and their meanings.

Table 3 Common SI Prefixes

Prefix

Symbol

Meaning

kilo-

k

1,000

thousand

hecto-

h

0 0

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