Thursday, August 18, 2011Thursday, August 18, 2011• Pick up the Pick up the PapersPapers from the from the side side

table.table.• Turn in your Turn in your Parent Letter or Parent Letter or

Getting to KnowGetting to Know to your period’s to your period’s colored drawer.colored drawer.

• Write down your HW in your Agenda!!! Write down your HW in your Agenda!!!

• Get out your Get out your Directed ReadingDirected Reading & & Checking PenChecking Pen

SI Measurements(also known as “metric system”)

• “SI” stands for “System International” or “International System of Measurement”

• What about it?

– Common Language for scientists– Based on units of 10– Multiply or divide to go up or down

when converting units– Prefixes determine “how much” of a

unit

SI Measurements(also known as “metric system”)

SI Measurements(also known as “metric system”)

Important BASE units to remember:

METERS = m (measures distance or length)

• Measure with ruler/meterstickruler/meterstick

LITERS = L (measures volume — how much space something takes up)

• Measure with graduated graduated cylinder/beakercylinder/beaker

• Or with a rulerOr with a ruler (length x height x (length x height x width)width)

GRAMS = gg (measures mass)• Measure with triple beam triple beam

balance/scalebalance/scale

oCELSIUS = ooCC (measures temperature)

• Measure with thermometerthermometer

Important PREFIXES to remember:

k = kilo- (means “10001000”)h = hecto-(means “100100”)D (da) = deca-(means “1010”)

BASE UNIT (liter, meter, gram)d = deci-(means “1/10” or 0.11/10” or 0.1)c = centi- (means “1/1001/100” or .01)m = milli- (means “1/10001/1000” or .001)

How to MeasureAREA = lengthlength X widthwidth• Units: SquaredSquared Units• Examples: mm22, cm, cm22, km, km22

How to MeasureMASS: measure of the amount of

mattermatter in an object• Use a Triple Beam Balance to add

the ones, tens, and hundreds grams units

** Triple Beam Balance Practice ** Triple Beam Balance Practice Sheet**Sheet**

How to MeasureVOLUME: how much

space a 3-D3-D object takes up

• Units for liquids: Liters/mLLiters/mL

• Units for solids: cmcm33

** Graduated Cylinder ** Graduated Cylinder Practice Sheet**Practice Sheet**

How to MeasureDENSITY = amount of mattermatter in a

given volumevolume• Density = massmassvolumevolume• Units: g/mL OR g/cm3