# Metric System

## What is SI? What does it stand for? Some history behind 'SI Units?'

SI is a system of measurements used by scientists. SI stands for the International System of Units. The metric system began as the legal system of measurement in France during the 1800's. It was designed to replace the misunderstood and mixed-up units that were in use at the time.

## Why are SI units and the metric system so useful and important?

SI units and the metric system are extremely important because they are used to report results and perform calculations. Scientists worldwide share discoveries and results in SI units.

## SI base units and abbreviations.

• The SI unit for length is the meter (m).
• The SI unit for volume is the liter (L).
• The SI unit for mass is the gram. (g).
• The SI unit for temperature is Kelvin. (K).
• The SI unit for time is seconds. (s).

## What is the metric unit stair step?

The metric unit stair step lists all the prefixes of SI units, from kilo to milli. The metric stair system demonstrates how to convert between various sizes of metric units quickly.

Kilo- Kiss
Hecto- Her
Deka- Daily
Base- Because
Deci- Divorce
Centi- Costs
Milli- Money

## How to use the stair step to go from smaller to larger.

To go from a smaller unit to a larger unit you look at the smaller unit in which you are currently on. You then loop from unit to unit until you get to the unit you want to convert to. Since you are moving left to larger units you need to move your decimal the same direction and amount of places as the units you switched from.

## How to use the stair step to go from larger to smaller.

To go from a larger unit to a smaller unit is the same basic process that I just explained. Only difference is you are going the opposite direction on the stair step, therefore you are taking the decimal the opposite direction. You loop your unit to the unit you are wanting. You move your decimal the same number of spaces to the right.

## EXAMPLES

100 mm= .1 meter.
928 dm= .0928 km.
56.2 L= .562 hL.
23 mm= 2.3 cm.

.6 km= 600 m
45 L= 45,000 mL
4.4 cm=44 mm
.0006 kg= 60 cg

## Some good sites

http://www.purplemath.com/modules/metric.htm
lamar.colostate.edu/~hillger/common.html
faculty.clintoncc.suny.edu
metricconversions.org

## Conclusion

The metric system is an easy way to convert units to units, and share you findings. Even though the United States doesn't use the metric system. Scientists in this country do. The United States is one of the only countries that has not converted to the metric system. I hope you not only enjoyed this presentation, but learned a thing or two along the way.