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Ken Rogers Miami Killian

Units of Measurement. Ken Rogers Miami Killian. What we’re going to be doing is similar to what is done with money (currency). $ 1.00. Think of the dollar as the main unit for measuring money. Based on that, you have smaller units. that are given names. $0.25. $0.05. $0.01. penny.

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Ken Rogers Miami Killian

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  1. Units of Measurement Ken Rogers Miami Killian

  2. What we’re going to be doing is similar to what is done with money (currency). $ 1.00 Think of the dollar as the main unit for measuring money. Based on that, you have smaller units that are given names. $0.25 $0.05 $0.01 penny nickel quarter

  3. What we’re going to learn are units for measuring. . and the smaller (and larger) units and their names. . and then, later, the relationships between these units. Relationships similar to: = ? ? =

  4. The international unit system is called Le Systeme International d’Unites, abbreviated SI. That’s French meaning International System of Units. We’ll discuss the basic units of this system along with the SI prefixes.

  5. Mass The basic unit for measuring mass is the kilogram. Your textbook is about 2 kilograms. The instrument we’ll use for measuring mass is a laboratory balance.

  6. Mass and weight are not quite the same. When any mass is near a massive object like the earth, gravity gives the mass its weight. An example would be objectsin outer space wouldbe weightless but they wouldstill have mass.

  7. Length or distance The SI unit for measuring length is the meter. A meter is a little bigger than 3 feet (a yard). Length is usually measured with a ruler.

  8. Volume Volume is the amount of space (or room) occupied by an object. The SI unit for measuring volume is the derived unit a cubic meter, m3. However, a cube this big (1 meter high, 1 meter wide, and 1 meter in length) is too big to measure most objects. So a cube was made that has dimensions 1/10 of a meter ( 1 decimeter). This cube is a liter.

  9. A cubic meter, m3, is about the size of a desk.

  10. 1m 1m3 = 1m 1 meter

  11. 1 liter 1 m3

  12. This is a liter. So, how big is a liter?

  13. The equipment we’ll be using to measure volumewill be . . . beaker graduated cylinder Erlenmeyer flask

  14. 200 180 160 140 120 100 80 60 40 20 The glassware is made to measure volume in milliliters. 200 mL Beaker

  15. Abbreviations meter m SI unit for mass is ? kg gram g liter L Capital L is used because lower case L looks like a 1 12L instead of 12l

  16. Measurement Systems American Metric SI length foot meter meter pound gram kilogram mass m3 volume gallon liter

  17. Now, along with the units of meters, grams and liters, we’ll be using prefixes. Let’s start with the biggest prefixes and work to the prefixes with the smallest meaning.

  18. SI Prefixes unit exponential Prefix abbreviation factor meaning trillion Tera T 1012 1,000,000,000,000 billion Giga G 109 1,000,000,000 million Mega M 106 1,000,000 Kilo k 103 1,000 Hecto h 102 100 Deka da 101 10 SI unit 10o 1 Deci d 10-1 1/10 Centi c 10-2 1/100 Milli m 10-3 1/1000 Micro m 10-6 1/1,000,000 Greek letter, mu Nano n 10-9 1/1,000,000,000

  19. The SI prefixes are used in conjunction with the SI units to create new units with either greater or smaller magnitude. For example when the prefix, kilo, is used with meter to make kilometer, the new unit is 1000 times larger. In other words, a kilometer is equal to 1000 meters. 1 km = 1000 m The abbreviation for kilo is k and the abbreviation for meter is m. So a kilometer is abbreviated km.

  20. The prefix, milli, means 1/1000. Combine that with meter to make millimeter. A millimeter is equal to 1/1,000 of a meter. (about the thickness of your fingernail) 1 mm = 1/1000 m The abbreviation for milli is m and the abbreviation for meter is also m. So a millimeter is abbreviated mm.

  21. The vitamins and minerals in food that is needed by your body every day are very small amounts. The amounts are usually measured in milligrams or micrograms. One gram is about the mass (weight) of a dollar bill. A microgram is 1/1,000,000 (one millionth) of a gram. 1 mg = 1/1,000,000 gram Or another way of thinking about is, it takes 1,000,000 mg to equal one gram. 1,000,000 mg = 1gram

  22. Remember the cubic meter . . . . . . being too big for practical purposes?

  23. 1 m3 1 liter So a cube was made that was 1 liter = 1 dm3 1/10 as big as a meter. That would make it a cubicdecimeter.

  24. Review The main SI units are: cubic meter (m3) Length: meter (m) Mass: kilogram (kg) Volume: Prefixes: kilo k 1000 deci d 1/10 centi m 10-6 micro c 1/100 n 10-9 nano giga G 109 m3 = dm3 = liter 1000

  25. Quiz

  26. SI Units Name________________ Period ______ Date _____

  27. 1. The main SI unit for measuring length or distance is a ____. 2. The main SI unit for measuring mass is a ________. 3. The main SI unit for measuring volume is a _________. (but it’s usually too big). 4. Instead of using that unit, a smaller unit that is a cubic decimeter is used. This dm3 is called a ______________. 5. A dollar bill has a mass of about ___________. 6. There are 3 pieces of lab equipment for measuring volume. Name one._____________________

  28. 7. All 3 pieces measure volume in what units? _____________ 8. What is the prefix meaning 1000? __________ 9. What is its abbreviation? _____ 10. The prefix centi- means _____________. 11. The prefix meaning 1/1000 is _______________. 12. Giga means __________________. 13. What’s the difference between mass and weight?

  29. 13 points 0 – 1 A 2 B 3 – 4 C 5 D 6 or more F

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