Green = Countries that use the metric system Burma Liberia Green = Countries that use the metric system Gray = Countries that do not use the metric system

What is the metric system? The metric system is also called the International System of Units (SI). The base units of measurement in the SI system are: length – meter (m) mass – gram (g) Volume – liter (L) time – second (s) temperature – kelvin (K) (but we will use Celsius (°C) in this class)

Tools for measuring length Meter stick, ruler

Tools for measuring Mass Scale, balance

Tools for measuring volume Graduated cylinder, beaker, pipette

What is the metric system? The metric system is based on multiples of 10 and all converting in the metric system can be done by multiplying or dividing by multiples of 10, (10, 100, 1000, etc.) The meter, gram, liter, second, & kelvin can all be made larger or smaller by adding prefixes to each base unit.

Metric System Prefixes and Their Meanings:

Converting in the Metric System

Let’s Watch a Brain Pop: Metric Units

Ladder Method 1st – Determine your starting point. KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit How do you use the “ladder” method? 1st – Determine your starting point. 2nd – Count the “jumps” to your ending point. 3rd – Move the decimal the same number of jumps in the same direction.

Example: 4 km = _________ m Ladder Method 1 2 3 KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit 4000 Example: 4 km = _________ m Where is the decimal?

Example: 55 mL = _________ L Ladder Method KILO 1000 Units HECTO 100 Units 3 DEKA 10 Units 2 1 DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit 0.055 Example: 55 mL = _________ L

< Conversion Practice > 1 1000 1600 14000 0.109 0.25 Try these conversions using the ladder method. 1 1000 1600 a) 1000 mg = _______ g b) 1 L = _______ mL c) 160 cm = _______ mm d) 14 km = _______ m e) 109 g = _______ kg f) 250 m = _______ km 14000 0.109 0.25 Compare using <, >, or =. g) 56 cm 6 m h) 7 g 698 mg < >

STUDENTS: STOP YOUR NOTES HERE

Metric Conversion Challenge Write the correct abbreviation for each metric unit. 1) Kilogram _____ 4) Milliliter _____ 7) Kilometer _____ 2) Meter _____ 5) Millimeter _____ 8) Centimeter _____ 3) Gram _____ 6) Liter _____ 9) Milligram _____ Try these conversions, using the ladder method. 10) 2000 mg = _______ g 15) 5 L = _______ mL 20) 16 cm = _______ mm 11) 104 km = _______ m 16) 198 g = _______ kg 21) 2500 m = _______ km 12) 480 cm = _____ m 17) 75 mL = _____ L 22) 65 g = _____ mg 13) 5.6 kg = _____ g 18) 50 cm = _____ m 23) 6.3 cm = _____ mm 14) 8 mm = _____ cm 19) 5.6 m = _____ cm 24) 120 mg = _____ g

Compare using <, >, or =. 25) 63 cm 6 m 27) 5 g 508 mg 29) 1,500 mL 1.5 L 26) 536 cm 53.6 dm 28) 43 mg 5 g 30) 3.6 m 36 cm

Metric Conversion Challenge… ANSWERS! Write the correct abbreviation for each metric unit. 1) Kilogram = kg 4) Milliliter = mL 7) Kilometer = km 2) Meter = m 5) Millimeter = mm 8) Centimeter = cm 3) Gram =g 6) Liter = L 9) Milligram = mg Try these conversions, using the ladder method. 10) 2000 mg = 2 g 15) 5 L = 5,000 mL 20) 16 cm = 160 mm 11) 104 km = 104,000 m 16) 198 g = .198 kg 21) 2500 m = 2.500 km 12) 480 cm = 4.80 m 17) 75 mL = 0.075 L 22) 65 g = 65,000 mg 13) 5.6 kg = 5,600 g 18) 50 cm = 0.50 m 23) 6.3 cm = 63 mm 14) 8 mm = 0.8 cm 19) 5.6 m = 560 cm 24) 120 mg = 0.120 g

Compare using <, >, or =. 25) 63 cm 6 m 27) 5 g 508 mg 29) 1,500 mL 1.5 L 26) 536 cm 53.6 dm 28) 43 mg 5 g 30) 3.6 m 36 cm STOP HERE

7588 cm 1.76 m 14970 mm 76.6 m 58770 m 15.621 km 795.9 mm 9131 cm 71543000 cm 7.851 km 69140000 mm 0.941600 km 5670 ml 7.770 l 36040 mg 159.5 g 19760 g 436.9 kg 66040000 mg 0.042130 kg

Find your table number and sit at the table beneath the # Please turn your Measuring Liquid Volume Lab into the in-box. Staple it if necessary. *There is a stapler on the back counter. Please have your SI Units homework out so I can stamp it.

KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit

KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit

KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit

KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit

KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit

KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit Meters Liters Grams CENTI 0.01 Unit MILLI 0.001 Unit