Must have a standard. A standard is an exact quantity people agree

to use for comparison. A standard means two people using the same

object should get close to the same results.

Measurement

Standards of the past People used to use

parts of their body to determine the length of something.

The standard would be a part of the king’s anatomy.

The standard yard was the distance from the king’s nose to his outstretched arm

People would use their feet to measure distance

This is how the term foot came about.

Today the standard “foot” in the English system is

12 inches = 1 foot

The English system is very confusing because it has so many

different values

America is the only country that still uses the old English system

Scientists give the English system the thumbs down

Scientists needed an exact and uniform system of weights and measurements

How did the metric system come about?

During the18th century scientists measured the distance from the earth’s equator to its North Pole and divided it into ten million parts.

This is how they came up with the length of the standard meter.

The Meter

The standard for the meter is kept in a safe in France.

The meter stick is a replica of that standard A meter is made up of 100 centimeters and 1000

millimeters

Scientists needed a way to measure liquids so

they took 10 cm and multiplied it by its length x width x height to come up with a standard for measuring volume

The liter is the size of 10 cm(3) 10cm x 10 cm x 10 cm Length x Width x Height = Volume The liter is used to measure liquids

How the liter came about

How the Gram came about

Scientists needed a standard to measure mass.

Mass is the amount of matter in an object

They decided to take one cubic centimeter of water and call it a gram

The time standard During the 15th

century a scientist named Galileo set the standard of time known as the second

The Mistake

Two different groups of scientists were working on the calculations to send a probe to Mars.

The American team did their calculations in the English standard and the other team did it in the metric system (OOPS!)

MARS

This made scientists very upset.

Kilo  means thousand (1000)

Hecto means hundred (100)

Deca means ten (10)

Deci means one-tenth (1/10)

Centi means one-hundredth (1/100)

Milli means one-thousandth (1/1000)

Metric chart

The Meter- Measures length Length is the distance between two points The Liter –Measures Volume Volume is how much space a liquid takes up The Gram- Measures mass Mass is how much matter is in an object

Copy This Down

How to use the metric chart

Rewrite the problem Check for the decimal (if no decimal, put at

end) Where do we start? Put pencil their Were do we go to? # of hopes and direction Do the same with decimals

Metric chart

kilo  hecto  deca     UNIT    deci  centi  milli   (meter, gram or liter)   

How the metric system works

•100cm = ___ m100cm = ___ m•100cm = 1.0 m100cm = 1.0 m•6.9mm = ___cm6.9mm = ___cm•6.9mm = .69 cm6.9mm = .69 cm