Measurement 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.

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

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

same object should get close to the same same object should get close to the same results.results.

Standards of the pastStandards of the past People used to use People used to use

parts of their body to parts of their body to determine the length determine the length of something.of something.

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

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

People would use their feet to People would use their feet to measure distancemeasure distance

This is how the term This is how the term foot came about.foot came about.

Today the standard Today the standard “foot” in the English “foot” in the English system is system is

12 inches = 1 foot12 inches = 1 foot

The English system is very The English system is very confusing because it has so many confusing because it has so many

different valuesdifferent values

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

Scientists give the English system Scientists give the English system the thumbs downthe thumbs down

Scientists needed an exact and uniform Scientists needed an exact and uniform system of weights and measurementssystem of weights and measurements

The MistakeThe Mistake

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

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

MARSMARS

This made scientists This made scientists

very upset. very upset. It cost the space It cost the space

program 125 million program 125 million dollars dollars

It cost the scientists It cost the scientists their timetheir time

Metric chartMetric chart Kilo  means thousand (1000)Kilo  means thousand (1000)

Hecto means hundred (100)Hecto means hundred (100)

Deca means ten (10) Deca means ten (10)

Deci means one-tenth (1/10)Deci means one-tenth (1/10)

Centi means one-hundredth (1/100)Centi means one-hundredth (1/100)

Milli means one-thousandth (1/1000)Milli means one-thousandth (1/1000)

Standard UnitsStandard UnitsUnit for:Unit for:

Length Length meter meterVolume Volume LiterLiterMass Mass gram gramTime Time second second

Standard UnitsStandard UnitsThe Meter- Measures lengthThe Meter- Measures lengthLength is the distance between two pointsLength is the distance between two pointsThe Liter –Measures VolumeThe Liter –Measures VolumeVolume is how much space a liquid takes Volume is how much space a liquid takes

upupThe Gram- Measures massThe Gram- Measures massMass is how much matter is in an objectMass is how much matter is in an object

K H D b D C MK H D b D C MHow to use the metric chartHow to use the metric chart

Rewrite the problemRewrite the problemCheck for the decimalCheck for the decimal (if no decimal, put at (if no decimal, put at

end)end)Where do we start? Put pencil thereWhere do we start? Put pencil thereWhere do we go?Where do we go?# of hops and direction# of hops and directionDo the same with decimalsDo the same with decimals

How the metric system worksHow the metric system works

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

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