the metric system!!
DESCRIPTION
THE METRIC SYSTEM!!. The universal language of science. 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 - PowerPoint PPT PresentationTRANSCRIPT
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!!!!!!