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SI Prefixes Agenda Review elements Correct SF worksheet Dend-writes on SI Prefixes Practice

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Ba

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Ge

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I

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K

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N

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Be

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H

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Mg

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Cl

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O

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Sr

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B

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Na

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Al

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C

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Si

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Ga

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Ca

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Sn

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P

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S

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Li

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F

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Pb

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Br

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Significant Figures Once Again Quick check on homework Did you complete it? Did you follow the directions on Section I telling the type of 0? Did you include units on every number for sections II – V? Did you fill in the blanks reminding you of SF rules?

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Section I 1. 2 SF 2. Trailing 0, 1 SF 3. Middle and trailing 0, 3 SF 4. 4 SF 5. Middle 0, 5 6. Leading and trailing 0, 3 SF 7. Trailing and leading 0, 4 SF 8. trailing 0, 4 SF 9. Middle and trailing 0, 3 SF 10. Leading and middle 0, 4 SF

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Section II cm cm cm g g cm g cm mL g

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Section III cm g mL g mL m m km m cm

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Section IV cm cm m mm m cm m g 2 (bad unit sorry) *10 6 m *10 -6 cm 2

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Section V cm m km mm cm m m km mm *10 -5 mm

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Place total out of 50 Don’t like your score? Grab SF to complete tonight to change your score.

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SI Prefixes September 17, 2007

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Scientific Notation # *10 exponent # must be less than 10, but greater than 1 If initial # > 1, then exponent is positive If initial # < 1, then exponent is negative

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SI Prefixes Giga – G billion times larger than m/L/g billion --- skip line Mega – M million times larger than m/L/gmillion --- Kilo – k 1000 times larger than m/L/g thousand Hecto – h 100 times larger than m/L/g hundred Deka – da 10 times larger than m/L/gten Gram/meter/liter base units

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Deci – d ten times smaller than m/L/g tenth Centi – c 100 times smaller than m/L/g hundredth Milli – m 1000 times smaller than m/L/g thousandth --- micro - million times smaller than m/L/gmillionth --- nano – n billion times smaller than m/L/gbillionth --- pico – ptrillion times smaller than m/L/gtrillionth

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Mnemonic Device Great Many Kids Have Dropped Dead Converting Metrics Minus Nine People Abbreviation will be provided with steps between on tests and is on doors in back of room!

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Converting Between Units Write down given Put matching unit on bottom – to cancel Put desired unit on top Set LARGER unit equal to ONE Count number of steps between units – the smaller unit will be 10 steps between the larger and smaller units

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