Date Dec 15 2014 Page Table of Contents
Date: Dec 15, 2014 Page: Table of Contents p. 1 W. O. D: Last 5 pages Warm-ups: Front Cover W. O. D. Motion - Object changes position over time, relative to a reference point. Question: Choose a reference point in the room. Describe your seat in the room relative to that reference point. (For example: Ms Johnson’s desk is 2 meters northeast of the door. )
Today’s plan • • • Warm- up Organize Speed notes Distance/Time graphing - together Finish questions from “Read about Speed” Physical Science text book. p. 118 -123 • Finish ladder questions • Reflect
Table of Contents p. 1 • • Rube Goldberg Machine Drawing p. 2 SI units/Webquest p. 3 Metric Lab p. 4 Text reading on Speed p. 5 Metric Ladder p. 6 Metric Ladder questions p. 7 Speed notes/d/t Graph p. 8
Table of Contents p. 1
Speed = Distance/Time v = d/t (We’ll use velocity and speed interchangibly for now) We will use m/s (meters/second) for our answers.
Speed = Distance/Time v = d/t (We’ll use velocity and speed interchangibly for now) What is your average speed if you take 0. 5 hours to jog 4000 m? Set up the formula. Extend: Convert your calucations to answer in m/s.
Practice problem: • Remember, v = d/t • Physicists uses the SI units m/s (meters/second) to measure speed. If you walk at 2 meters per second (m/s), how far do you walk in 12 seconds?
If the average speed of a car is 110 km/h, how long will it take the car to travel 715 km/h?
Speed Reading SNB p. 5 • Complete reading in Physical Science text book. p. 118 -123 • Do reading checks as you read (label as reading check #1, reading check #2, etc). • Complete questions 1 -7 from page 123 • Extend: Go to p. 142 -143. Do ? ’s 6, 10, 11, 14, 17, 18, 19,
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
Olympic Speed Skating 0 m/s 12 m/s How many miles/hour is Shani Davis traveling? There are 1610 meters in a mile.
Reflection (back-side of warm-up sheet) What is the difference between speed and velocity? Homework: Pick up a bus schedule from the bus you ride home. Bring it to class tomorrow. (5 points).
Domino Derby 1. Set up 25 equally spaced dominoes in a straight line. 2. Use a meter stick to measure the total length of the row of dominoes, and record the length. 3. Use a stopwatch to measure how long it takes the dominoes to fall. 4. Predict what would happen if the distance between the dominoes changed. 5. Test your prediction.
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