The Metric System of Measurement
THE METRIC SYSTEM OF MEASUREMENT:
Click here: History of the Metric System
The Metric System is a decimal system of measurement based on the number ten (10).
The United States uses the English System of measurement.
"Magnum est ut inter sese colloqui possint periti in scientiae rebus."
Translation of Latin above:
"It is important that scientists can communicate with each other."
The metric system is commonly used by scientists as a standard form of communicating data worldwide.
Scientists share their research and experimental results with other fellow scientists.
Scientists communicate their quantitative data to one another.
To learn more about an attempt to create a common world language, click here: Esperanto
Click here: Martian Metric Mistake
...to learn more about the "Mars Mission Metric Disaster"
~ THE TOWER OF BABEL ~
Expression: "Don't babel like an idiot."
The Tower of Babel / History of Babel
(a fictional engineering disaster due to communication breakdown)
NOTE: There are only three (3) countries in the world that do NOT use metric:
United States, Liberia, Myanmar (Burma).
Click here: Myanmar = Burma
Click here: History of Liberia / Liberia / Timeline
In 1960, the General Conference of Weights and Measures
approved an updated version of the metric system,
known as the International System of Units, abbreviated SI.
The main reason why the USA does NOT convert to metric is expense.
It would cost BILLIONS of dollars for the United States to convert to the metric system!!!
...plus, it would create tons of trash, not to mention the inconvenience.
Items that would have to be thrown away and
replaced by a metric equivalent:
- Bathroom scales
- Recipes and cook books
- Measuring cups for cooking/baking
- Household thermostats
- Ovens (temperature dial)
- Road signs (speed and distance)
- Carpenter's tools (wrenches, nails, wood, screws, blueprints)
- Computer software (tabs, print configuration, spacing)
- Textbooks (math, science, geography)
- Automobile speedometers/odometers
- Rulers (inch-foot, yard sticks, measuring tape)
- Gasoline pumps
- Food packaging
- Paper and xerox machines
- Clothing (sizes for shoes & pants, patterns, factory equipment)
- ...and many other miscellaneous household items
CHART SHOWING STANDARD METRIC UNITS:
|TYPE OF MEASUREMENT
Volume: the amount of space an object occupies.
Liquid volumes are usually measured in metric units of milliliters (mL).
1 mL = 1 cc
Doctors and medical professionals tend to use cubic centimeters (cc).
the U-shaped curvature that liquids have in their containers.
Click here: Meniscus Madness
Remember...Always read the BOTTOM of the MENISCUS curve!
How is VOLUME determined?
Solid volumes of cubes/rectangles are ususally measured using the formula:
Length x Width x Height
Irregular solid volumes are measured using the "Water Displacement Method."
Bathtub Tints Experiment: Volume Practice
Length Measurement in Metric
Above: Platinum-Iridium Standard Meter Bar
Above: Wooden Meter Stick (portion)
The meter was originally defined to represent one ten millionth (1⁄10,000,000) of the distance between the North Pole and the Equator
(on a line of longitude through the former Prime Meridian of Paris, France).
Learn more about the Meter
The Prime Meridian represents zero (0) degrees longitude.
The Prime Meridian used to pass through Paris, France.
Today, the Prime Meridian passes through Greenwich, England.
Lines of longitude start at the North Pole and end at the South Pole.
One meter is currently defined as:
1⁄299,792,458th of a light-second.
NOTE: Really HUGE distances in space are measured in...
LIGHT-YEARS: (the distance light travels in one calendar year).
Click here: Learn more about the Speed of Light
Light moves at a speed of about 300,000 kilometers per second. (186,000 miles/second)
More precisely, one light-year is equal to 9,500,000,000,000 kilometers (5,866,000,000,000 miles).
So in one year, light can travel almost 10 trillion km (~ 6 trillion miles). Wow!
ABOVE: An animated line showing the speed of light
on a scale model of the Earth and the Moon.
(about 1.2 light-seconds apart)
USING A RULER:
1. Start measuring at the zero mark.
2. Rulers are NOT swords! (lunch detention)
3. Do NOT bend rulers. (they break)
4. Do NOT spin rulers. (they break)
5. Do NOT take classroom rulers out of class.
Remember: Start measuring at the zero mark.
1 INCH = 2.5 CENTIMETERS
Chart of Metric Prefixes:
Metric Conversion and English Equivalents:
There are twelve (12) inches in a foot. (12" = 1')
There are 1,000 millimeters in a meter. (milli = 1/1000th)
There are 100 centimeters in a meter. (centi = 1/100th)
There are 1,000 meters in a kilometer. (kilo = 1,000)
One (1) kilometer equals 0.62 miles. (10 km = 6.2 mi)
NOTE: There are ten (10) millimeters in one (1) centimeter. (1cm = 10mm)
One Millimeter: Width of one (1) dime
width of a penny or a dime
width of a large paper clip
length of a baseball bat
distance an average person can walk in ten minutes
One Meter = Length on one (1) German Shepard or two (2) Cocker Spaniels
Metric Measurement Practice:
Click here: More Metric Practice Examples
~ Mass ~
Mass: the measure of the amount of matter (atoms) in an object.
Mass is measured in metric units of grams. (g)
Mass is measured using a triple beam balance (shown below).
Below: Electronic Pan Balance (for measuring mass in gram units)
degrees Celsius (Centigrade)
Temperature: the amount of kinetic energy (motion) in matter.
Daniel Gabriel Fahrenheit
Below: Red bulb thermometers are filled with isopropyl (rubbing) alcohol, dyed RED.
Below: Silver bulb thermometers are filled with toxic, liquid mercury metal.
(Avoid using this kind of thermometer!)
Below: No No!!
Do NOT try this at home!
Above: Cinnabar (natural mercury ore rock)
Mercury was used in the hat industry long ago.
Have you seen the film, Alice in Wonderland?
Have you heard the expression, "Mad as a Hatter?"
Disney's Mad Hatter had Mercury Poisoning and became crazy!
Click here: Mad Hatter Syndrome / Mercury Poisoning
Above: Mercury Warning Sign on the Concord River, MA