UNIT 1 FORCES & MOTIONUNIT 1 FORCES & MOTIONCh 1 – Science & MeasurementCh 1 – Science & Measurement

1.11.1 Time and DistanceTime and Distance

1.21.2 Investigations & ExperimentsInvestigations & Experiments

1.31.3 SpeedSpeed

1.1 Time and Distance1.1 Time and Distance

Thinking about timeThinking about time– What time is it?What time is it? (e.g., 12:35 PDT) (e.g., 12:35 PDT)– How much time? (3:44.25, WR mile)How much time? (3:44.25, WR mile)– How is time How is time measuredmeasured? (min,sec,hrs)? (min,sec,hrs)– Mixed Mixed units allow us to express time in units allow us to express time in

wide variety of units.wide variety of units.

ex: 1 min = 60 s and 60 min = 1 hr, soex: 1 min = 60 s and 60 min = 1 hr, so

there are 3,600 s in 1 hour!there are 3,600 s in 1 hour!

1.1 Time and Distance (cont.)1.1 Time and Distance (cont.)Measuring DistanceMeasuring Distance– Units of length: metric vs. EnglishUnits of length: metric vs. English

Length can be measured inLength can be measured in meters meters, centimeters, , centimeters, kilometers or inches, feet, yards, and mileskilometers or inches, feet, yards, and miles

– Why were units invented?Why were units invented?Communication Communication between various people (common between various people (common “language”)“language”)

Standard for consistencyStandard for consistency

- Scientists useScientists use metric metric units units- You use units (usually English) You use units (usually English) everydayeveryday!!

(ounces, pounds, gallons,…)(ounces, pounds, gallons,…)

1.1 Time and Distance 1.1 Time and Distance AssignmentAssignment

Vocabulary, page 17, Set OneVocabulary, page 17, Set One

Concept Review, page 18, #1,2Concept Review, page 18, #1,2

Problems, pages 18-19, #1-5Problems, pages 18-19, #1-5