Metric Conversions Ladder Method T Trimpe 2008 http

Metric Conversions Ladder Method T. Trimpe 2008 http: //sciencespot. net/

Why use it? • http: //youtu. be/EUpwa 0 je 6_Y

Measuring Basics • Volume – amount of space occupied by an object • Length – distance between two points • Mass – amount of matter in an object • Time – period between two events • Temperature – measure of the average energy particles have

Measuring … … using Significant Figures!! • Significant figures is used to show the accuracy in a measurement: Ø Accuracy depends on the smallest increment shown on measuring tool (meter stick, balance, etc. ) Ø The last decimal place (digit) is an estimate Ø The more decimals places (digits), the more accurate that measurement is

1. Determine the smallest increment on the measuring tool What decimal place does each small line represent? 1. 2. 3. 4. 5. 6. Hundreds Tens Ones Tenths Hundredths thousands

2. Determine the next decimal place beyond that smallest increment (Your measurement will be recorded to this decimal place) What is the next decimal place? 1. 2. 3. 4. 5. 6. Hundreds Tens Ones Tenths Hundredths thousands

3. Record the measurement, estimating one decimal place past the smallest increment shown What is the proper measurement? 1. 2. 3. 4. 5. 6. 824 cm 82. 4 cm 8. 240 cm 82 cm 8. 2 cm

The proper measurement: The Pencil is more than 8. 2 cm long … … But less than 8. 3 cm long … so we estimate to the next decimal place. 8. 24 cm The decimal places recorded shows accuracy of the measurement tool The measurement recorded is to the hundredths place, so we know the smallest increment was to the tenths

You always estimate one decimal place PAST the smallest increment shown ? Measuring Volume 7 Meniscus – read measurements at bottom of meniscus

Volume? 1. 2. 3. 4. 5. 50. 2 m. L 50. 28 m. L 52. 80 m. L I have no idea

Length? 1. 2. 3. 4. 8 mm 8. 00 mm 80 mm

Mass? 1. 2. 3. 4. 5. 6. 602005. 72 200605. 72 260. 572 265. 720 265. 7

Temperature Fahrenheit (º F ), Celsius (º C ), Kelvin (K) º C = 5 (º F - 32. 0 º) 9 º F = 9 (º C) + 32. 0 º 5 K = º C + 273

If you need extra help! Basic measuring practice http: //www. bgfl. org/bgfl/custom/resource s_ftp/client_ftp/ks 2/maths/measures/in dex. htm

King Henry Metrics • An easy way to convert metric units of measure is to use the King Henry Mnemonic device. • King Henry Died By Drinking Chocolate Milk

Ladder Method 1 2 KILO 1000 Units HECTO 100 Units 3 DEKA 10 Units Meters Liters Grams DECI 0. 1 Unit 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. CENTI 0. 01 Unit MILLI 0. 001 Unit 4 km = _____ m Starting Point Ending Point How many jumps does it take? 4. __. __. = 4000 m 1 2 3

Conversion Practice Try these conversions using the ladder method. 1000 mg = _______ g 1 L = _______ m. L 160 cm = _______ mm 14 km = _______ m 109 g = _______ kg 250 m = _______ km Compare using <, >, or =. 56 cm 6 m 7 g 698 mg

Metric Conversion Challenge 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 = _______ m. L 20) 16 cm = _______ mm 11) 104 km = _______ m 16) 198 g = _______ kg 21) 2500 m = _______ km 12) 480 cm = _____ m 17) 75 m. L = _____ 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

Compare using <, >, or =. 25) 63 cm 26) 536 cm 6 m 53. 6 dm 27) 5 g 28) 43 mg 508 mg 5 g 29) 1, 500 m. L 30) 3. 6 m 1. 5 L 36 cm

Equivalences • Units of Weight – 1 oz 28. 35 g – 1 lb 454 g – 2. 2 lb 1 kg • Units of Capacity – 1. 06 qt 1 L – 1 gal 3. 79 L • Units of Length – – 1 in = 2. 54 cm 3. 28 ft 1 m 1. 09 yd 1 mi 1. 61 km