SI UNITS A Logical Way to Measure!

SI UNITSA Logical Way to Measure!

A number alone is meaningless: 5 blocks from Here? Meet me in 5…. 5 Minutes?

DISTANCE

TEMPERATURE

I. Standard Units of Measurement • Systeme International – we let the French name it • BASE 10 system – • 10, 100, 1000 etc. • based on metric system

SI Base Units

METRIC CONVERSION (STAIRCASE METHOD) To convert to a smaller unit, move decimal point to the right Kilo 1000 units Hecto 100 units Deka 10 units Basic Unit deci 0.1 units centi 0.01 units milli 0.001 units To convert to a larger unit, move decimal point to the left

Remember? “King Henry Died by drinking chocolate milk” (Kilo) (Hecta) (Deca) (base) (deci) (centi) (milli)

A. SI Prefix Conversions 0.2 1) 20 cm = ______________ m 2) 0.032 L = ______________ mL 3) 45 Km = ______________ mm 4) 805 dm = ______________ Km 32 0 0 0 0 0 0 45,000,000 0.0805 0

Celsius temperature conversion formulae

Derived units • Multiply or divide standard units. • Exs: • Volume: • cm3 • Density: • grams/cm3

Graphing • 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)

Example

II) Bar graphs • Compare counted information • Bars not connected (discrete)

III) Circle graph • Show how some quantity is broken down into parts

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

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

SI UNITS A Logical Way to Measure!