THE METRIC SYSTEM!!THE METRIC SYSTEM!!

The universal language of science

The universal language of science

What is the difference between metric and

standard (English) System of measure?

What is the difference between metric and

standard (English) System of measure?

The English system uses a base 12 to make conversions and gets very complicated

The Metric system uses a base 10 (just like the fingers on your hand) to make conversions and is VERY easy

The English system uses a base 12 to make conversions and gets very complicated

The Metric system uses a base 10 (just like the fingers on your hand) to make conversions and is VERY easy

Don’t most countries use the English system?

Don’t most countries use the English system?

No…in fact, beside the United Sates, the only other country that uses the English system is…………….

(Take a guess)

No…in fact, beside the United Sates, the only other country that uses the English system is…………….

(Take a guess)

You Guessed it…..You Guessed it….. Myanmar , officially the Union of

Myanmar is the largest country in geographical area in mainland Southeast Asia . Also known as Burma or the Union of Burma

Myanmar , officially the Union of Myanmar is the largest country in geographical area in mainland Southeast Asia . Also known as Burma or the Union of Burma

Why does the United States still use the English

system?

Why does the United States still use the English

system? Convenience? Maybe we just don’t want

to change because we would have to learn some new stuff

Cost? It would cost a lot of money: Think about roadsigns, containers, cars, foods, etc

Probably a little of both…but in this class, the English system of measure does not exist

Convenience? Maybe we just don’t want to change because we would have to learn some new stuff

Cost? It would cost a lot of money: Think about roadsigns, containers, cars, foods, etc

Probably a little of both…but in this class, the English system of measure does not exist

OK…Here we goOK…Here we go

This is a much easier way to do calculations, and make conversions:

Try these 2 calculations one in the English system and one in metric Convert 7,899 inches to miles Convert 7,899 centimeters into

kilometers

This is a much easier way to do calculations, and make conversions:

Try these 2 calculations one in the English system and one in metric Convert 7,899 inches to miles Convert 7,899 centimeters into

kilometers

First the English measureFirst the English measure

7,899 inches/12inches in a foot 658.25 feet

• 658.25 feet/5,280 feet in a mile.12466856060 of a

mile

• All that just to make 2 conversions???? NO Thanks! Pain in the BOOTY

7,899 inches/12inches in a foot 658.25 feet

• 658.25 feet/5,280 feet in a mile.12466856060 of a

mile

• All that just to make 2 conversions???? NO Thanks! Pain in the BOOTY

Now the Metric methodNow the Metric method

7,899 centimeters to kilometers…that’s 5 conversions!!!! Holy Cow!

Ready? Go… Move the decimal 5 places to the left. That’s it.

.07899 kilometers

7,899 centimeters to kilometers…that’s 5 conversions!!!! Holy Cow!

Ready? Go… Move the decimal 5 places to the left. That’s it.

.07899 kilometers

I’m a cow, and I can do

THAAAAT

Start with base unitsStart with base units

Base units are what we multiply by the prefix to arrive at a new quantity. It doesn’t matter what it is…just apply the prefix to the base unit.

Here are some common base units

Base units are what we multiply by the prefix to arrive at a new quantity. It doesn’t matter what it is…just apply the prefix to the base unit.

Here are some common base units

MassMass

Grams-How much is a gram? About a penny. How many grams in an ounce? Who cares…we don’t use English units

Grams-How much is a gram? About a penny. How many grams in an ounce? Who cares…we don’t use English units

VolumeVolume

2 ways to do thisLiters-usually liquid or gas containersMeters cubed: B X H X W = M3

2 ways to do thisLiters-usually liquid or gas containersMeters cubed: B X H X W = M3

LengthLength

Meters: This is about as far apart ( a little more) as you would hold your hands for a yard.

Meters: This is about as far apart ( a little more) as you would hold your hands for a yard.

TemperatureTemperature

Celsius, or Centigrade: How do you covert Farenheit to Celsius? 1st subtract 32 from the Farenheit number Then divide by 9 Then multiply by 5 Isn’t that fun???? Really, who cares? 98.6F is roughly equal to 37C

Celsius, or Centigrade: How do you covert Farenheit to Celsius? 1st subtract 32 from the Farenheit number Then divide by 9 Then multiply by 5 Isn’t that fun???? Really, who cares? 98.6F is roughly equal to 37C

Why don’t we just use Farenheit?

Are you kidding?How do you covert Farenheit to Celsius?

1st subtract 32 from the Farenheit numberThen divide by 9Then multiply by 5Isn’t that fun???? Really, who cares?98.6F is roughly equal to 37C

Don’t tell me…Temperature?Don’t tell me…Temperature?

Fraid so- Fahrenheit is an outdated and pretty useless scale for measuring temperature. This silly temperature scale was named after Daniel Gabriel Fahrenheit (1686 ﾐ 1736)

There are conflicting stories as to how he arrived at this scale, but it is obsolete today

Fraid so- Fahrenheit is an outdated and pretty useless scale for measuring temperature. This silly temperature scale was named after Daniel Gabriel Fahrenheit (1686 ﾐ 1736)

There are conflicting stories as to how he arrived at this scale, but it is obsolete today

Celsius Celsius

In Science and really in the rest of the world we use the Celsius scale, named after Anders Celsius (1701-1744). THIS is based on the melting and boiling points of water: 0 degrees and 100 degrees…Unfortunately these temperatures can be expressed as negatives which makes them difficult to do calculations with, sooooo……

In Science and really in the rest of the world we use the Celsius scale, named after Anders Celsius (1701-1744). THIS is based on the melting and boiling points of water: 0 degrees and 100 degrees…Unfortunately these temperatures can be expressed as negatives which makes them difficult to do calculations with, sooooo……

Kelvin ScaleKelvin Scale

The Kelvin scale is more useful in science because there are no negative temperatures. This is based on the absolute zero concept. That is the temperature at which all molecular motion stops. This is 273.15 below zero Celsius. That is cold!!! This is about 460 degrees below zero Farenheit

The Kelvin scale is more useful in science because there are no negative temperatures. This is based on the absolute zero concept. That is the temperature at which all molecular motion stops. This is 273.15 below zero Celsius. That is cold!!! This is about 460 degrees below zero Farenheit

PrefixesPrefixes

Now that we have the base units, we need to know what to do with them. In the metric system, we add a prefix to a base and multiply the number represented by the prefix by one base unit… Here we go

Now that we have the base units, we need to know what to do with them. In the metric system, we add a prefix to a base and multiply the number represented by the prefix by one base unit… Here we go

Prefix names and numeric meanings

Prefix names and numeric meanings

Here are some fun ones

Yotta- Y 10 24 1 000 000 000 000 000 000 000 000 Zetta- Z 10 21 1 000 000 000 000 000 000 000 Exa- E 10 18 1 000 000 000 000 000 000 Peta- P 10 15 1 000 000 000 000 000 Tera- T 10 12 1 000 000 000 000 Giga- G 10 9 1 000 000 000 Mega- M 10 6 1 000 000

myria- my 10 4 10 000 (this is now obsolete)

Here are some fun ones

Yotta- Y 10 24 1 000 000 000 000 000 000 000 000 Zetta- Z 10 21 1 000 000 000 000 000 000 000 Exa- E 10 18 1 000 000 000 000 000 000 Peta- P 10 15 1 000 000 000 000 000 Tera- T 10 12 1 000 000 000 000 Giga- G 10 9 1 000 000 000 Mega- M 10 6 1 000 000

myria- my 10 4 10 000 (this is now obsolete)

This is making me

Dog-gonemad

More useful prefixesMore useful prefixes

kilo- k 10 3 1000 hecto- h 10 2 100 deka- D 101 10 Unit ? 100 1 deci- d 10 -1 0.1 centi- c 10 -2 0.01 milli- m 10 -3 0.001 micro- mu 10 -6 0.000 001 nano- n 10 -9 0.000 000 001

kilo- k 10 3 1000 hecto- h 10 2 100 deka- D 101 10 Unit ? 100 1 deci- d 10 -1 0.1 centi- c 10 -2 0.01 milli- m 10 -3 0.001 micro- mu 10 -6 0.000 001 nano- n 10 -9 0.000 000 001

I’m catching on

Sigh…Don’t these people have something better to

do with their time?

Sigh…Don’t these people have something better to

do with their time?

pico- p 10 -12 0.000 000 000 001 femto- f 10 -15 0.000 000 000 000 001 atto- a 10 -18 0.000 000 000 000 000 001 zepto- z 10 -21 0.000 000 000 000 000 000 001 yocto- y 10 -24 0.000 000 000 000 000 000 000 001

pico- p 10 -12 0.000 000 000 001 femto- f 10 -15 0.000 000 000 000 001 atto- a 10 -18 0.000 000 000 000 000 001 zepto- z 10 -21 0.000 000 000 000 000 000 001 yocto- y 10 -24 0.000 000 000 000 000 000 000 001

The good newsThe good news

You only need to know the prefixes in the middle

k h da u d c m mu n

You only need to know the prefixes in the middle

k h da u d c m mu n

Putting it togetherPutting it together Add the prefix to the base: Example how many grams is 25 kG

Kilo is 1000 25 is 25 (duh) So this is 25,000 grams

Would this number be the same if the base was chocolate chip cookies????????

Add the prefix to the base: Example how many grams is 25 kG

Kilo is 1000 25 is 25 (duh) So this is 25,000 grams

Would this number be the same if the base was chocolate chip cookies????????

ConversionsConversions

Since everything is base 10, all you have to do is move the decimal:

Convert 3899 mL to LLook at the khdaUdcm prefix scale and move

the decimal the same direction as the prefix

Since we are moving from milli to unit, move the decimal 3 spaces to the left:

3.899 L

Since everything is base 10, all you have to do is move the decimal:

Convert 3899 mL to LLook at the khdaUdcm prefix scale and move

the decimal the same direction as the prefix

Since we are moving from milli to unit, move the decimal 3 spaces to the left:

3.899 L

PracticePractice

Convert1) 23 mG to dG2) 45 daL to mL3) 9966 mM to kM

Convert1) 23 mG to dG2) 45 daL to mL3) 9966 mM to kM

AnswersAnswers

1) 23 mG = .23 dG2) 45 daL = 450000 mL3) 9966 mM = .009966 kM

1) 23 mG = .23 dG2) 45 daL = 450000 mL3) 9966 mM = .009966 kM

Wa-Hoooooooo!Wa-Hoooooooo!

I am a Metric-Maniac!!!!!! I am a Metric-Maniac!!!!!!