Objective

• To perform metric conversions.

Chapter 1

Section 1: The Metric System(The International System Of Units or SI System)

What is SI?

• SI stands for Syteme internationale d’Unites• Used by scientists since 1960 to set a

consistent worldwide standard.

SI Base UnitsQuantity SI Base Unit Symbol

Length (l) meter m

Mass (m) kilogram kg

Temperature (T) Kelvin K

Time (t) second s

Amount of Substance (n)

mole mol

SI PrefixesPrefix Symbol Value

kilo (k) k 1000hecto (h) h 100

deka (da) da 10deci (d) d 0.1

centi (c) c 0.01

milli (m) m 0.001

Convert:1.253 mL to liters 7. 273 Gg to mg2.1258 cm to m 8. 7.2 L to nL3.15 g to kg 9. 56 cm to m4.17.3 m to cm 10. 870 mL to GL5.2.56 m to km 11. 0.539 mm to km6.5.13 m to mm 12. 200 mm to cm

Practice

Convert:1.253 mL to liters 7. 273 Gg to mg2.1258 cm to m 8. 7.2 L to nL3.15 g to kg 9. 56 cm to m4.17.3 m to cm 10. 870 mL to GL5.2.56 m to km 11. 0.539 mm to km6.5.13 m to mm 12. 200 mm to cm1. 0.253 L 7. 273,000,000,000,000 mg2. 12.58 m 8. 7,200,000,000 nL3. 0.015 kg 9. 0.56 m4. 1730 cm 10. 0.000000000870 GL5. 0.00256 km 11. 0.00000539 km6. 5130 mm 12. 20 cm

Figure out which of the following measurements is largest:

a.) 0.500 Lb.) 5000 mLc.) 0.050 kLd.) 50.0 cL

Hint: Convert each answer to the same unit!