1. Metric System

2. Scientist need a common system of measurement: The metric system. Scientist need a common system of measurement: The metric system. AKA: International system of Units (SI system) AKA: International system of Units (SI system) The metric system is a decimal system of measurement based on certain physical standards and multiples of ten. The metric system is a decimal system of measurement based on certain physical standards and multiples of ten.

3. What is measurement? What is measurement? The process by which the amount or quantity of something is calculated.

4. Metric or SI units include: Metric or SI units include: 1.Length : measured in kilometers, meters, centimeters, and millimeters. 1.Length : measured in kilometers, meters, centimeters, and millimeters. Base unit is meter. Base unit is meter. 1 meter (m) = 100 centimeter (cm) 1 meter (m) = 100 centimeter (cm) 1 meter (m) = 1000 millimeters (mm) 1 meter (m) = 1000 millimeters (mm) 1 kilometer (km) = 1000 m 1 kilometer (km) = 1000 m

5. 2. Mass: measured in kilograms, grams, tons. Base unit: gram (g) 1 gram = 1000 milligrams (mg) 1 kilogram (kg) = 1000 g 1000 kg = 1 metric ton

6. 3. Volume: measured in liters, milliliters. 3. Volume: measured in liters, milliliters. Base unit: liter (L) Base unit: liter (L) 1 L = 1000 milliliters (mL) 1 L = 1000 milliliters (mL) 1 liter = 1000 cubic centimeters 1 liter = 1000 cubic centimeters

7. 4. Temperature: usually measure in degrees Celsius (C) 4. Temperature: usually measure in degrees Celsius (C) O degrees C = freezing point and melting point O degrees C = freezing point and melting point 100 degrees C = boiling point 100 degrees C = boiling point

8. What are the advantages of using the metric system? What are the advantages of using the metric system? 1.multiple of ten make it so much easier to measure 1.multiple of ten make it so much easier to measure 2. used around the world so we have one common system. (no conversion or extra work). 2. used around the world so we have one common system. (no conversion or extra work).

9. Remember these prefixes: Remember these prefixes: Kilo - prefix that means 1000 times larger Kilo - prefix that means 1000 times larger Centi - prefix that means 1/100 (100 times smaller) Centi - prefix that means 1/100 (100 times smaller) Milli - prefix that means 1/1000 (1000 times smaller) Milli - prefix that means 1/1000 (1000 times smaller)

10. Prefix Multiply base unit by mega 1,000,000 ex: 1Mg= 1,000,000 g kilo 1,000 ex: 1kL =1000L hecto 100 ex: 1hg = 100 g Deka /deca 10 ex: 1 dam = 10m deci 0.1 ex: 1dg = 0.1g centi 0.01 ex: 1cm = 0.01m milli 0.001 ex: 1mL =0.001L Metric (SI) prefixes to know:

11. Using a table to make conversions kilo (k) hecto (h) deka (dk) meter (m) liter (L) gram (g) deci (d) centi (c) centi (c) milli (m) 1.Place finger on the prefix of the number you are given to convert 2.Next, move finger to the prefix you want to convert to 3.Count the number of places 4.Know the direction you move (left or right). 5.Move the decimal point the same number of places and in the same direction

12. Example: Ex. 7.37 cm = _______ m Place finger on the centi (c) box and move left to the kilo (k) box. Count the number of spaces you move. Move in same direction. The answer is 0. 0737km This is the same as multiplying 7.37 by 0.01 or 1/100. 7.37 x 0.01 = 0.0737 kilo (k) hecto (h) deka (dk) meter (m) liter (L) gram (g) deci (d) centi (c) centi (c) milli (m)

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 =.8 cm 19) 5.6 m = 560 cm 24) 120 mg = g Metric Conversion Challenge

16. Write the correct abbreviation for each metric unit. 1) Kilogram __kg_ 4) Milliliter _mm_ 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 = 2.000 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 =.075 L 22) 65 g = 65,000 mg 13) 5.6 kg = 5,600 g 18) 50 cm =.5 m 23) 6.3 cm = 630 mm 14) 8 mm =.8 cm 19) 5.6 m = 560 cm 24) 120 mg =.120 g Metric Conversion Challenge

17. 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

18. Derived Units Derived units are units that are measured using one or more other units. Derived units are units that are measured using one or more other units. They include: area, volume and density. They include: area, volume and density. Name UnitsSymbol Name UnitsSymbol AreaSquare metersm2 AreaSquare metersm2 Volumecubic metersm3 Volumecubic metersm3 Densitygrams per cubic cmg/cm3 Densitygrams per cubic cmg/cm3

19. SI base units Base quantityNameSymbol masskilogramkg timeseconds electric currentampereA thermodynamic temperaturekelvinK amount of substancemolemol luminous intensitycandelacd