1. FACTOR – LABEL Method ALWAYS works because of these two principles: A fraction equals ______ when the _______________ and __________________ are equivalent Anything ______________ by ONE is _______________ ONE NUMERATOR DENOMINATOR MULTIPLIED UNCHANGED

2. 3 days = _________ s 255 inches = _________ m 2.54 cm = 1 inch 3 days X 255 in X 1 day 24 hr X 1 hr 60 min 60 sec 1 min X=

3. 7,000 cm 3 = ________ in 3 600,000 s = ________ weeks 2.54 cm = 1 inch

4. 25 m/s = ________ km/hr 180 mph = _________ m/s 1.61 km = 1 mile 1000 m = 1 km 1.61 km = 1 mile 1000 m = 1 km

5. Writing numbers as powers of TEN 6 x 10 x 10 x 10 x 10 x 10600,000 = 6 x 10 5 =.00007 = 7  10  10  10  10  10 = 10 10 10 10 10 7 x x x x x 1 1 1 1 1 = 7 x 1 10 5 = 7 x 10 -5

6. 34,000,000 =3.4x 10 7.0000008 =.000678 = 72.5 =.00000000099 = 8 x 10 -7 6.78 x 10 -4 7.25 x 10 1 9.9 x 10 -10

7. “ TIMES TEN TO THE ” 8.2 x 10 -9 7.4 x 10 11 1.1 x 10 -20

8. BASE UNITS METER m LITER l or L GRAM g

9. Pico p 10 -12 TeraT 10 12 Nanon 10 -9 GigaG 10 9 Micro  10 -6 Mega M 10 6 Millim 10 -3 Kilo k 10 3 Centic 10 -2 Hecto h 10 2 Decid 10 -1 Deka da 10 1

10. 8.1  L = ____________ML 25 pm = ______ cm 8.1  L X ---------------- X ---------------- = To base unitTo desired unit L L L 1 1 x 10 -6 L ML1 1 x 10 6 8.1 x 10 -12 ML

11. 1. Non-zeros ARE significant 1243 sig figs 46.714 sig figs 2. Zeros between sig figs ARE significant 400,0016 sig figs 30.53 sig figs 3. Place-holders ARE NOT significant 3001 sig figs.00252 sig figs 4. Exact zeros ARE significant 3.003 sig figs.202 sig figs

12. 1. Non-zeros ARE significant 2. Zeros between non-zeros ARE significant 3. Place-holders ARE NOT significant 4. Exact zeros ARE significant 90.02 2300.00005.0402 1.0020 4 sig figs 2 sig figs 1 sig fig 3 sig figs 5 sig figs

13. 1. Non-zeros ARE significant 2. Zeros between sig figs ARE significant 3. Place-holders ARE NOT significant 4. Exact zeros ARE significant 200 200.0 2020.002.200 1 sig figs 4 sig figs 3 sig fig 1 sig figs 3 sig figs

14. 1 sig fig 2 sig figs 3 sig figs 4 sig figs 7 sig figs 20,000 23,000 23,500 23,460 23,456.79

15. 8.1 m X ---------------- X ---------------- = m 1 100 cm 2.54 cm 1 inch 318.8976 cm 2 sig figs Round to 2 sig figs 320 cm