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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 1. 47 cm 2. 706 cm 3. 321.4 cm 4. 162.6 g 5. 133.8 g 6. 69.9 cm 7. 48.38 g 8. 0.0071 cm 9. 34.91 mL 10. 365 g

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Section III 1. 23.99 cm 2. 11.6 g 3. 184.7 mL 4. 25.35 g 5. 31.913 mL 6. 42.7 m 7. 0.000 311 m 8. 23 km 9. 76.0 m 10. 1.28 cm

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Section IV 1. 24.8 cm 2 2. 72 cm 2 3. 18 m 2 4. 119 mm 2 5. 12.01 m 2 6. 40 cm 2 7. 10 m 2 8. 36 g 2 (bad unit sorry) 9. 2.6*10 6 m 2 10. 4.13*10 -6 cm 2

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Section V 1. 4.898 cm 2. 2.563 m 3. 6.10 km 4. 5.092 mm 5. 7.25 cm 6. 2.757 m 7. 0.948 m 8. 4.76 km 9. 117 mm 10. 1.88*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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DO NOW! What do you know about mass and weight? Complete the chart on the top of the front page of your notes packet.

DO NOW! What do you know about mass and weight? Complete the chart on the top of the front page of your notes packet.

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