Transcript Slide 1

• BLACK or Black(ish) SLIDE: Pay attention, follow
directions, complete projects as described and answer
required questions neatly.
Copyright © 2010 Ryan P. Murphy
• RED or Red(ish) SLIDE: These are notes that are very
important and should be recorded in your science journal.
• Or, Red Words
Copyright © 2010 Ryan P. Murphy
-Nice neat notes that are legible and use indentations
when appropriate.
-Example of indent.
-Skip a line between topics
-Make visuals clear and well drawn. Please label.
Resistance Arm
Effort Arm
Why do we have to learn this?
• Standard: You will demonstrate an understanding of technological
design and scientific inquiry, including process skills, mathematical
thinking, controlled investigative design and analysis, and problem
solving.
• School Goal, Math: Student’s math communication skills, reasoning,
explaining, justifying will be mastered.
• Essential Question: Why do scientists use the metric
system?
Objectives:
•You will convert, apply, and arrange metric conversion units
•You will use, apply, and evaluate metric prefixes, and base units to
labs
•You will apply unit factor analysis, scientific notation, and significant
figures to metric calculations.
•You will apply the ladder method and division and multiplication by 10
to calculate and convert metric units.
The International System of Units
If everyone is to understand what your
measurements mean, you must agree on the
units that will be used.
By international agreement, a set of units
called "The International System of Units"
has been defined for scientific work. This
system was adopted in 1960 by the General
Conference on Weights and Measures.
These units are also called metric units or SI
units.
A long time ago in a faraway galaxy there lived a
monarch who loved chocolate milk.
His name was Henry, and he was known to all of his
subjects as,
King Henry!
Throughout his kingdom, King Henry made sure that all of
the cows were fed great supplies of chocolate to continue
to provide him with his beloved chocolate milk drink.
He had very happy cows!
King Henry drank chocolate milk with his
breakfast, lunch, and dinner.
He even drank chocolate milk for his
bedtime snack.
King Henry drank chocolate milk by the
liter!
King Henry wanted all living
creatures in his kingdom to
enjoy chocolate milk as much as
he enjoyed chocolate milk.
However, a liter was not the best
serving size for every creature.
The Royal Potter was called for
and the command was given for
new serving vessels to be
created to fit every creature in
the kingdom.
SI base units we will use
Quantity
Unit Name
Unit Abbreviation
Length
meter
m
Mass
kilogram
kg
Time
second
s or sec
Volume
Liters
l
Temperature
Kelvin
K
Luminous Intensity
candela
cd
Temperature
Celsius
0C
For the creatures smaller than the king, the
Royal Potter designed
Deciliters that were 1/10th the size of a liter,
Centiliters that were 1/100th the size of a
liter, and
Milliliters that were 1/1000th the size of a
liter.
The milliliters were just right for the Royal
Chocolate Beetles found in the kingdom.
For the creatures greater than the king, the
Royal Potter designed,
Dekaliters that were 10 times the size of a
liter,
Hectoliters that were 100 times the size of
a liter, and
Kiloliters that were 1000 times the
size of a liter.
The kiloliters were just right for the
Royal Elephants of the kingdom.
The Royal Potter lined the vessels up in his
workroom from largest to smallest to show
the king.
The king’s vessel was in the center of the
line, for the king was the center of the
kingdom. The vessels were arranged in the
following order:
kiloliter hectoliter dekaliter Liter deciliter centiliter milliliter
King Henry loved the new vessels that were designed
larger and smaller than his own for all of the living
creatures in his kingdom.
The Royal Potter explained that the sizes increased and
decreased from the king’s liter, the original unit of
measurement, by multiples of ten.
He explained how to convert between the sizes by
multiplying by ten or dividing by ten. King Henry
wondered how he would ever remember the order of the
vessels.
The Royal Potter said that he remembered them by
thinking of a saying. He said, “I remember the order by
saying ‘King Henry Does Usually Drink Chocolate Milk’
and then I have no problem remembering the order.”
“That is exactly right!” said King Henry. “Now I shall
remember the sizes of the vessels!”
He took another big drink of chocolate milk and …
died
Now it is known as the
Metric Prefix Mnemonic
• King
• Henry
• Died
• Unexpectedly
• Drinking
• Chocolate
• Milk
(kilo, 1,000)
(hecto, 100)
(deka, 10)
(Unit (liter, meter, gram, Celsius)
(deci 1/10) (da)
(centi 1/100)
(milli, 1/1,000)
SI Prefixes
Prefixes can be placed in front of the base units. These prefixes are used
to represent quantities that are larger or smaller than the base units.
Prefix
Unit Abbreviation
Meaning
giga
G
1,000,000,000
mega
M
1,000,000
kilo
k
1,000
hecto
h
100
deca
da
10
Gram, meter,
1
deci
d
.1
centi
c
.01
milli
m
.001
micro

.000001
nano
n
.000000001
Metric Unit of Length
The meter (m) is the SI base unit of length.
Prefixes are used to indicate distances
longer and shorter than a meter.
What name and symbol is given to each of the following
units of length?
a).000001 m
b).001 m
c).01 m
d).1 m
e)10 m
f) 1000 m
Micrometer m
Millimeter mm
Centimeter cm
Decimeter dm
Decameter dam
Kilometer km
Metric Ladder
“Use it and you will never get lost!”
Kilo
Hecto
Deka
UNITS
deci
centi
UNITS
UNITS
UNITS
Gram
UNITS
UNITS
milli
UNITS
1000
100
10
Liter
0.1
0.01
0.001
Meter
How To Use Your Ladder
1)
2)
Start at the unit/prefix given to you (starting point).
Count the number of steps/places to the unit/prefix
you want (final destination).
3) Move the decimal point the number of steps/places in
the same direction.
Ladder Method
1
2
KILO
1000
Units
3
HECTO
100
Units
DEKA
10
Units
DECI
0.1
Unit
Meters
Liters
Grams
How do you use the “ladder” method?
1st – Determine your starting point.
2nd – Count the “jumps” to your ending point.
3rd – Move the decimal the same number of jumps in
the same direction and add zeros for each jump
CENTI
0.01
Unit
MILLI
0.001
Unit
4 km = _________ m
Starting Point
Ending Point
How many jumps does it take?
__ __ __
4.1 .2 3. . = 4000 m
Multiplying/Dividing
Practice Problem 1
How many mg are in 3.6 Kg?
3.6 kg
Kilo
36.0
hectogram
Hecto
360. 0
dekagrams
Deka
3600. 0
grams
Gram
36000. 0 360000.0
decigrams
deci
Starting point
centigrams
centi
3600000.0
milligrams
milli
Final Destination
3,600,000 mg
6 places to the right of the decimal point
Practice Problem 2
How many hm are in 12.67 mm?
Kilo
Hecto
Deka
Meter
deci
centi
Final Destination
0.0001267 hm
5 places to the left of the decimal point
milli
Starting point
Helpful Mnemonic
King
Henry
Died
Usually
drinking
chocolate
Kay
Hollered
Dog
ARF!
dog
can’t
move
UNITS
UNITS
UNITS
UNITS
UNITS
0.1
0.01
0.001
UNITS
1000
100
10
Gram
Liter
Meter
Try to create your own mnemonic to help you
remember the prefixes and their order. This
will be important because you will not receive
the metric map on your quiz.
milk
Another Helpful Mnemonic
K
H
UNITS
1000
UNITS
100
D
UNITS
10
!
Gram
Liter
d
c
m
UNITS
UNITS
UNITS
0.1
0.01
0.001
Meter
Try to create your own mnemonicto help you
remember the prefixes and their order. This
will be important because you will not receive
the metric map on your quiz.
Show what you have learned
King Henry’s Flip Book
• Make Flip Book
http://www.scetv.org/education/ntti/pdf/2002pdf/fliipout_A2
b.pdf
• Show units
• Show prefixes
• Show conversions
• Show definitions
• Show numerical units
Add to King Henry’s or create your
own mnemonic, or poem
• Make new mnemonic
• Create new poem
• Example:
• When it's zero it's freezing,
when it's 10 it's not,
when it's 20 it's warm,
when it's 30 it's hot!
Or,

Thirty is hot
Twenty is nice
Ten is cool
Zero is ice