SI Prefixes

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

Ba

Ge

I

K

N

Be

H

Mg

Cl

O

Sr

B

Na

Al

C

Si

Ga

Ca

Sn

P

S

Li

F

Pb

Br

Significant Figures Once AgainQuick 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?

Section I1. 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

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

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

Section IV

1. 24.8 cm2

2. 72 cm2

3. 18 m2

4. 119 mm2

5. 12.01 m2

6. 40 cm2

7. 10 m2

8. 36 g2 (bad unit sorry)

9. 2.6*106m2

10. 4.13*10-6 cm2

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

Place total out of 50

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SI Prefixes

September 17, 2007

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

SI PrefixesGiga – G billion times larger than m/L/g billion

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Mega – M million times larger than m/L/g million

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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/g ten

Gram/meter/liter base units

Deci – d ten times smaller than m/L/g tenthCenti – c 100 times smaller than m/L/g hundredthMilli – m 1000 times smaller than m/L/g thousandth------micro - million times smaller than m/L/g millionth------nano – n billion times smaller than m/L/g billionth------pico – p trillion times smaller than m/L/g trillionth

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!

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 10steps between the larger and smaller units