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Science and Measurement

Science and Measurement. Chapter 1.2 The Foundations of Physical Science. Time in Science. Time is used in two ways One way is to identify a particular moment in the past or future It is just a time of day This is the way “time” is used in everyday conversation

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Science and Measurement

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  1. Science and Measurement Chapter 1.2 The Foundations of Physical Science

  2. Time in Science Time is used in two ways One way is to identify a particularmoment in the past or future • It is just a time of day • This is the way “time” is used in everyday conversation The second way is to describe a quantity of time • “How much time?” • A time interval is also a quantity of time • Any calculation that you do willinvolve time intervals not time of day

  3. Time in seconds • Many problems in science use time in seconds • For calculations, you may need to convert hours and minutes into seconds How many seconds is this time interval? CONVERT ALL TO SECONDS 2 hr x 60 min x 60 sec = 7200 sec 1 hr 1 min

  4. How many seconds is this time interval? • CONVERT ALL TO SECONDS HOURS: 2 hr x 60 min x 60 sec = 7200 sec • 1 hr 1 min MINUTES: 30 min x 60 sec = 1800 sec 1 min SECONDS: 45 sec NOW---ADD THEM ALL UP!!!! 7200 sec + 1800 sec + 45 sec = 9,045 seconds

  5. Distance • Distance is the amount of space between two points • Distance is measured in units of length • The English system uses inches, yards, feet, miles • The SI basic distance unit is the meter • Prefixes are added to the name to describe very large or small measurements

  6. Meter Prefixes • Prefixes are added to the names of basic SI units such as meter, liter and gram. • Prefixes describe very small or large measurements.

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