si units a logical way to measure!

SI UNITSA Logical Way to

Measure!

SI UNITSA Logical Way to

Measure!

Standard: CAa:

(UNIT 1)

The student will demonstrate an understanding of how scientific inquiry and technological design, including mathematical analysis, can be used appropriately to pose questions, seek answers, and develop solutions.

2

Meet me in 5….

5 Minutes?

5 blocks from Here?

A number alone is meaningless:

DISTANCEDISTANCEMeasure Feet12 inches 1

1 yard 3

1 mile 5280

1 fathom 6

1 AU (Astronomical Unit)

491,040,000,000

TEMPERATURETEMPERATUREEVENT FARENHEIT

Water Freezes 32

Room Temp. 68 to 72

Body Temp. 98.6

Water Boils 212

I. Standard Units of Measurement

I. Standard Units of Measurement

Systeme International – we let the French name it

BASE 10 system – 10, 100, 1000 etc.based on metric system

Systeme International – we let the French name it

BASE 10 system – 10, 100, 1000 etc.based on metric system

SI Base UnitsSI Base UnitsQuantityQuantity UnitUnit AbbreviationAbbreviation

LengthLength metermeter mm

VolumeVolume LiterLiter LL

MassMass gramgram gg

TimeTime secondsecond ss

TemperatureTemperature CelsiusCelsius CC

METRIC CONVERSION (STAIRCASE METHOD)METRIC CONVERSION (STAIRCASE METHOD)

Kilo1000units Hecto

100units Deka

10units Basic

Unit deci0.1

units

centi0.01units

milli0.001units

To convert to a smaller unit, movedecimal point to the right

To convert to a larger unit, movedecimal point to the left

Remember?Remember?

“King Henry Died by drinking chocolate milk”

(Kilo) (Hecta) (Deca) (base) (deci) (centi) (milli)

“King Henry Died by drinking chocolate milk”

(Kilo) (Hecta) (Deca) (base) (deci) (centi) (milli)

A. SI Prefix ConversionsA. SI Prefix Conversions

1) 20 cm = ______________ m

2) 0.032 L = ______________ mL

3) 45 Km =

______________ mm

4) 805 dm = ______________ Km

1) 20 cm = ______________ m

2) 0.032 L = ______________ mL

3) 45 Km =

______________ mm

4) 805 dm = ______________ Km

0.2

0.0805

45,000,000

32

0000 000000 00

00

Celsius temperature conversion Celsius temperature conversion formulaeformulae

from Celsius to Celsius

°F = °C × 9⁄5 + 32 °C = (°F − 32) × 5⁄9

Derived unitsDerived units

Multiply or divide standard units.Exs: Volume: cm3

Density: grams/cm3

Multiply or divide standard units.Exs: Volume: cm3

Density: grams/cm3

Graphing GraphingVisual display of information or data

Type used depends on type of data

Visual display of information or data

Type used depends on type of data

I) Line graph Show trends or changes

over time

Independent variable on the x-axis (horizontal)

Dependent variable d on the y-axis (vertical)

I) Line graph Show trends or changes

over time

Independent variable on the x-axis (horizontal)

Dependent variable d on the y-axis (vertical)

d.d. ExampleExampled.d. ExampleExample

II) Bar graphsII) Bar graphsCompare counted Compare counted informationinformation

Bars not connected Bars not connected

(discrete)(discrete)

II) Bar graphsII) Bar graphsCompare counted Compare counted informationinformation

Bars not connected Bars not connected

(discrete)(discrete)

III) Circle graphIII) Circle graphShow how some quantity is Show how some quantity is broken down into partsbroken down into parts

III) Circle graphIII) Circle graphShow how some quantity is Show how some quantity is broken down into partsbroken down into parts

Exs:Exs:

DATA: # freshman, sophomores etc. at KHS in 2009GRAPH: BARDATA: # of freshman, sophomores etc as percent of total students at KHS in 2009GRAPH: CIRCLE

DATA: # freshman, sophomores etc. at KHS in 2009GRAPH: BARDATA: # of freshman, sophomores etc as percent of total students at KHS in 2009GRAPH: CIRCLE

DATA: # freshman at KHS from 2003-2009GRAPH: LINE

DATA: # freshman at KHS from 2003-2009GRAPH: LINE