Measurements Used in Science

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# Measurements Used in Science - PowerPoint PPT Presentation

Measurements Used in Science. The International System of Units. The International System of Units (AKA the Metric System). The International System is called the SI , using the first two initials of its French name Système International d'Unités .

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### Measurements Used in Science

The International System of Units

The International System of Units (AKA the Metric System)
• The International System is called the SI, using the first two initials of its French name Système Internationald'Unités.
• It is a measurement system based on units of ten.
In all there are seven SI base units:
• the meter (m) for distance,
• the kilogram (kg) for mass,
• the second (s) for time,
• the ampere (A) for electric current,
• the Kelvin (K) for temperature,
• the mole (mol) for amount of substance, and
• the candela (cd) for intensity of light.
There are several dozen prefixes used but the ones listed below are most commonly used in scientific measurements.

Prefix decimal equivalent exponential equivalent

Pico (p) 0.000000000001 10-12

Nano (n) 0.000000001 10-9

Micro (µ) 0.000001 10-6

Milli (m) 0.001 10-3

Centi (c) 0.01 10-2

Deci (d) 0.1 10-1

no prefix 1.0 100

Deka (da) 10.0 101

Hecto (h) 100.0 102

Kilo (k) 1000.0 103

Mega (M) 1,000,000.0 106

Giga (G) 1,000,000,000.0 109