1. THE METRIC SYSTEM Unit two How to use the metric system, how to convert with in the system and how to go between the metric system and the U.S. system.

2. WHAT ARE “UNITS” IN SCIENCE? Units are inserted after a number to give the number meaning. Example: The boy went 25. does not have units the boy went 25 miles. Does have units The boy went 25 kilometers. Does have units

3. WHY IS IT IMPORTANT? Even though the United states does not use the metric system, most of the world does, only 3 countries have the US system as their standard. The metric system is standard in most STEM careers Also I believe that someday the United states will switch over to the Metric system. While the US system is set up randomly (12 inches in a foot, 5380 ft in a mile) the metric system is based on 10 The US system has different names for different weights, lengths and volumes. The metric uses the same root (base) word for each.

5. THE ROOT OR BASE WORDS Length: Meter Distance between 2 points. Mass: Gram How much matter an object takes up. How much stuff there is Volume: Liter How much space an object takes up

6. THE ORIGIN OF THE METER It is devolved in France in the 1790’s It is 1/10,000,000 of the distance from the north pole to the equator. The standard for the meter is kept in a safe in France.

7. HOW TO USE “METERS” If you are measuring the distance between very far away points you use Kilometers this is like measuring in half miles. If you need to measure something not that big but still far apart you would use meters, yards are comparable. If you are measuring a very small distance then use centimeters or millimeters these are fraction of inches

8. THE ORIGIN OF THE GRAM Scientist took a 1 cm x 1 cm x 1 cm cube of water and weighed it and that is a gram. Do you think a gram is very heavy?

9. THE ORIGIN OF THE LITER Scientists made a container that is 10 centimeter’s (cm) x 10 cm x 10 cm and that is a meter Also known as cm 3 Length x width x height = volume The liter is used to measure liquids For solids it is more common to use cm 3

10. USING THE METRIC SYSTEM Kilo means thousand (1000)k Hecto means hundred (100)h Deca means ten (10) da Deci means one-tenth (1/10)d Centi means one-hundredth (1/100)c Milli means one-thousandth (1/1000)m

11. THE ORDER OF THE METRIC SYSTEM K ing H enry D ied B y D rinking C hocolate M ilk

12. HOW TO USE THE METRIC CHART How to use the metric chart Check for the decimal (if no decimal, put at end) Determine the starting point Count the “jumps” to the ending point Move the decimal the same number of jumps in the same direction

13. KILO 1000 Units HECTO 100 Units DEKA 10 Units DECI 0.1 Unit CENTI 0.01 Unit MILLI 0.001 Unit Meters Liters Grams Ladder Method How do you use the “ladder” method? 1 st – Determine your starting point. 2 nd – Count the “jumps” to your ending point. 3 rd – Move the decimal the same number of jumps in the same direction. 4 km = _________ m 1 2 3 How many jumps does it take? Starting Point Ending Point 4. 1 __. 2 3 = 4000 m

14. Try these conversions using the ladder method. 1000 mg = _______ g 1 L = _______ mL160 cm = _______ mm 14 km = _______ m109 g = _______ kg 250 m = _______ km Conversion Practice Compare using, or =. 56 cm 6 m 7 g 698 mg

15. 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