Transcript Slide 1
Converter’s Creed Raise your right hand and repeat after me! I (state your name) am aware that converting between units may seem weird and confusing. However, I am also aware of my ability to accomplish anything that I want to, especially when I maintain a positive attitude. I vow to keep an open mind and refrain from complaining as I begin to learn about these processes. I will be successful in the end. This certificate is awarded to Who successfully completed the Conversion Course offered by Howell Middle School South. With this certificate, the aforementioned student can perform a variety of conversions upon request. ___________________ Mr. Jones – 7th Science HMSS Level of Certification STANDARD Date of Issuance:______ Certificate #:_________ Levels of Certification • Levels of Certification are assigned dependent on the grade level achieved on the “Conversion Examination” • Levels are as follows: 90 - 100% Advanced 80 - 89% Standard ≤ 79% Provisional Practice Problems 1. How many milligrams are in 3.6 kilograms? 3,600,000 milligrams 2. Convert 15 liters to centiliters 1,500 centiliters 3. How many hm are in 12.67 mm? 0.0001267 hm 4. Convert 128,650 mL to daL 12.865 daL 5. Jason ran 1.61 km. How many meters did he run? 1,610 meters The Metric System The system of measurement utilized by the International System of Units or the Système International d'Unités (SI). This system was established to provide consistency related to weights and measures and is the primary system of measurement used around the world (however, not in the United States). Each measurement within this system consists of a base unit (liter, meter, gram, etc.) usually attached to a prefix (kilo, hecto, deca, deci, centi, milli, etc.). One can easily navigate, or convert, within the metric system by multiplying or dividing by a power of 10. In other words, by simply moving the decimal point to the right or the left, it is possible to convert from one unit of measure to another within this system. Example 5 kilometers = 5,000 meters = 5,000,000 millimeters Each of these conversions were made by simply moving the decimal point to the right or the left Prefixes The chart below provides a list of some commonly used prefixes Symbol T G M k h da Prefix teragigamegakilohectodek(c)a NO PREFIX (UNIT) d c m μ n decicentimillimicronano- Numerical Expression Factor 1 000 000 000 000 1 000 000 000 1 000 000 1 000 100 10 1012 109 106 103 102 101 1 100 0.1 0.01 0.001 0.000001 0.000000001 10-1 10-2 10-3 10-6 10-9 Units The chart below provides a list of some commonly used units Units Symbol liter meter gram Joule second Pascal L m g J s Pa Used to Measure: volume distance/length mass (weight) energy time pressure Combining Prefixes and Units Values in the metric system must contain a unit and the units are typically preceded by a prefix Prefixes tera (T) giga (G) mega (M) kilo (k) hecto (h) dek(c)a (da) deci (d) centi (c) milli (m) micro (µ) nano (n) *The milli + gram = milligram (mg) kilo + liter = kiloliter (kL) Units liter (L) meter (m) gram (g) Joule (J) second (s) Pascal (Pa) centi + meter= centimeter (cm) lists of prefixes & units are not all-inclusive Metric Map “Use it to help guide you through the metric system” UNITS Gram kilo hecto deka Liter deci centi milli Meter UNITS How To Use Your Map 1) 2) 3) 4) Identify your starting point - this is the number followed by a prefix/unit. Identify your final destination – this is the prefix/unit you want in the end. Count the number of steps/places from the starting point to the final destination. Move the decimal point the number of steps between the two locations, in the same direction. *This map does not show all prefixes and units Practice Problem 1 How many milligrams are in 3.6 kilograms? kilo hecto deka Gram deci Starting point •Direction: •Steps: 6 centi milli Final Destination 3,600,000 mg kg 0 0 0 0 3 600 mg Practice Problem 2 Convert 15 liters to centiliters kilo hecto deka Liter deci Starting point •Direction: •Steps: 2 1,500 cL 1 5 0L 0 0cL centi milli Final Destination Practice Problem 3 How many hm are in 12.67 mm? kilo hecto deka Meter deci Final Destination •Direction: •Steps: 5 00.0001267 0 0 0 1 2 67hm hm mm centi milli Starting point Practice Problem 4 Convert 128,650 mL to daL kilo hecto deka Liter deci Final Destination •Direction: •Steps: 4 1 212.865 8 6 5 0daL 0mL daL centi milli Starting point Practice Problem 5 Jason ran 1.61 km. How many meters did he run? kilo hecto Starting point •Direction: •Steps: 3 deka Meter deci Final Destination 1,610 1 6 1km 0m 0m centi milli Helpful Acrostic kay hit dog ARF! dog can’t Try to create your own acrostic to help you remember the prefixes and their order. This will be important because you will not receive the metric map on your quiz. Thank you for the acrostic Mrs. Eisenhower – Marblehead, MA move