Standards of Measurement © Copyright 2003 - 2004.  M. J. Krech. All rights reserved.

Measurement Used to express the amount of something Unit fixed amount or quantity used by everyone when measuring Measuring must be Reliable (dependable-gives you the same results on successive trials) Accurate (exact -conforms to a standard) Able to be Communicated (can be passed on in an understandable manner)

The Metric System International System of Units (SI) Global language for measurement Decimal based system of basic measurement which uses base units and prefixes Base Units Include Length = meter Volume = liter Mass = gram Time = second Temperature = degrees Celsius or Kelvin

The Metric System International System of Units (SI) Prefixes are used with base units Prefix Meaning Abbreviation Kilo one thousand k Hecto one hundred h Deka ten da Deci one tenth d Centi one hundredth c Milli one thousand m Metric system is made up of prefixes and base units Example: Centi + meter = centimeter Kilo + liter = kiloliter

How to convert within the metric system METRIC CONVERSION How to convert within the metric system © Copyright 2003 - 2004.  M. J. Krech. All rights reserved.

King Henry Drinks Utterly Delicious Chocolate Milk Mnemonic Phrase King Henry Drinks Utterly Delicious Chocolate Milk Memorize this!

How to convert within the Metric System On your paper draw a line and add 7 tick marks:

Next: Above the tick marks write the abbreviations for the King Henry mnemonic phrase: k h d u d c m m L g Write the units in the middle under the “U”.

Let’s add the meter line: k h d u d c m km hm dam m dm cm mm L g

Let’s add the liter line: k h d u d c m km hm dam m dm cm mm kL hL daL L dL cL mL g

Let’s add the gram line: k h d u d c m km hm dam m dm cm mm kL hL daL L dL cL mL kg hg dag g dg cg mg

How to use this device: Look at the problem. Look at the unit that has a number. On the device put your pencil on that unit. Move to new unit, counting jumps and noticing the direction of the jump. 3. Move decimal in original number the same # of spaces and in the same direction.

Example #1: Look at the problem. 56 cm = _____ mm Look at the unit that has a number. 56 cm On the device put your pencil on that unit. k h d u d c m km hm dam m dm cm mm

Example #1: One jump to the right! Move to new unit, counting jumps and noticing the direction of the jump! k h d u d c m km hm dam m dm cm mm One jump to the right!

Example #1: Move decimal in original number the same # of spaces and in the same direction. 56 cm = _____ mm 56.0. One jump to the right! Move decimal one jump to the right. Add a zero as a placeholder.

Example #1: 56 cm = _____ mm 56cm = 560 mm

Example #2: Look at the problem. 7.25 L = ____ kL Look at the unit that has a number. 7.25 L On the device put your pencil on that unit. k h d u d c m kL hL daL L dL cL mL

Example #2: Move to new unit, counting jumps and noticing the direction of the jump! k h d u d c m kL hL daL L dL cL mL Three jumps to the left!

.007.25 Example #2: (3) Move decimal in original number the same # of spaces and in the same direction. 7.25 L = ____ kL .007.25 Three jumps to the left! Move decimal to the left three jumps. Add two zeros as placeholders.

Example #2: 7.25 L = ____ kL 7.25 L = .00725 kL

Example #3: Try this problem on your own: 45,000 g = ____mg k h d u d c m kg hg dag g dg cg mg

45,000.000. Example #3: k h d u d c m kg hg dag g dg cg mg Three jumps to the right! 45,000.000.

Example #3: 45,000 g = 45,000,000 mg Three jumps to the right!

Example #4: Try this problem on your own: 5 cm = ____ km k h d u d c m km hm dam m dm cm mm

.00005. Example #4: k h d u d c m km hm dam m dm cm mm Five jumps to the left! .00005.

Example #4: 5 cm = .00005 km Five jumps to the left!

Examples #5-9: (5) 35 mm = ____ cm (6) 14,443 L = ____ kL (7) 0.00056 kg = ____ g (8) 35.4 L = ____ mL (9) 16 mm = ____ km

Examples #10-14: (10) 10 km = ____ m (11) 13 g = ____ kg (12) 56 mm = ____ km (13) 0.02 L = ____ mL (14) 2,050 mg = ____ g

Common Conversions Length 1 ft = 12 in 1 yd = 3 ft 1 mi = 5280 ft 1 in = 2.54 cm 1 km = 0.62 mi

Common Conversions Volume 1 qt = 2 pts 1 gal = 4 qts 1 L = 1.06 qts 1 cc = 1 cm3 = 1 mL 1 L 1 QT

Common Conversions Weight/Mass 1 lb = 16 oz 1 lb = 454 g 1 kg = 2.2 lbs

Common Conversions Temperature

Tool that offers a guarantee when dealing with conversions Factor Label Method Tool that offers a guarantee when dealing with conversions Rules Start with what is given Use a string of conversion factors Divide-out labels (Ask yourself - did you get a guarantee? ) Do arithmetic (if necessary - round final answer to nearest 100th )

The End