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NIS – PHYSICAL SCIENCE

NIS – PHYSICAL SCIENCE. Lecture 3 SI Units August 19, 2010 Ozgur Unal. SI UNITS. Measuring distance : Length is the distance between two points . In SI, we use meter (m) to measure distances . Measure the length of your pencil using your rulers. Measuring volume :

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NIS – PHYSICAL SCIENCE

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  1. NIS – PHYSICAL SCIENCE Lecture 3 SI Units August 19, 2010 OzgurUnal

  2. SI UNITS Measuringdistance: Length is thedistancebetweentwopoints. In SI, weusemeter (m) tomeasuredistances. Measurethelength of yourpencilusingyourrulers Measuringvolume: • Volume is theamount of spaceoccupiedby an object. • Forobjectswithregularsizes (such as a brick), you can calculatethevolume. • Volume of a liquid is expressed in liters. • 1 L = 1 dm3

  3. SI UNITS Measuringmatter: Mass is a measurement of thequantity of matter in an object. Unit of mass in SI is kilograms (kg) Density • Density is themassperunitvolume of a material. • density = mass / volume • CheckTable 3 on page 19 fordensities of differentmaterials

  4. SI UNITS Measuring time: It is sometimesnecessarytomeasuretheamount of time betweenevents (justlikeyoudidyesterdaywithpopcorns). SI unit of time is second (s). Measuringtemperature: • Temperaturetellsyouhow hot orcold an object is. • Differentunitsfortemperature(Celsius, Kelvin, Fahrenheit). • SI unit of temperature is Kelvin (K). • In K scale, waterfreezes at 273 K andboils at 373 K. • You can convertbetweenunitsdoingsomecalculations.

  5. Minilab Minilab: Readtheminilab on page 19. Form groups of 2 or 3. Instead of a pencilusetheitemgiventoyouandfollowtheinstructions. Answer “Analysis” questions. Cleanupyourdeskaftertheminilab.

  6. NIS – PHYSICAL SCIENCE Lecture 4 CommunicatingWithGraphs August 20, 2010 OzgurUnal

  7. Graphs A graphis a visualdisplay of data. Graphsareusefulfordisplayingnumericalinformation in business, science, sports, medicineetc. Threedifferenttypes of graphs: Line, Bar andCircle

  8. LineGraphs • Placetheindependentvariable on the x-axis. • Make sure tolabeltheaxiswithappropriateunits. • Consecutivenumbersshould be evenlyspaced. • Example: Seedgrowth A linegraphshowstherelationshipbetweentwovariables: Dependentandindependentvariables. Most of the time theindependentvariable is the time. CheckTable 4 andFigure 18.

  9. Bar andCircleGraphs A bar graph is usefulforcomparinginformationcollectedbycounting. Each bar represents a quantitycounted. Placetheindependentvariable on the x-axis. Example: Number of students in eachgrade. • A circlegraph(or a piegraph) is usedtoshowhowsomefixedquantity is brokendownintoparts. • CheckFigure 21 on page 26. • Tocreate a circlegraph, start withthe total amount, andthencalculatetheratio of eachcomponent in the total. • Findouttheanglesforeachpie.

  10. Using Graphs Some data can be shownbymorethanonetype of graph. Checkthisout:

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