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Graphing Basics - Physical Science
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Graphing Basics - Physical Science

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  • 1. Graphing Data Showing patterns & trends 2010-2011
  • 2. Types of data (information)
    • Variables
      • dependent variable
        • measured variable
        • unpredictable change : we don’t know how it will change until we do the investigation
        • Y-axis
      • independent variable
        • manipulated variable
        • predictable change : it only changes because we chose how it would change
        • X-axis
      • Constant Variables
        • Remain the same throughout the experiment
    Physical Science The effect of _____________ on _____________ Independent Variable Dependent Variable
  • 3. Examples of experiment - A
    • How does volume of sample affect the mass of a metal?
      • we set up an experiment massing different size cubes of the same metal
        • dependent variable (Y-axis)?
          • Mass of cube
        • independent variable (X-axis)?
          • Volume of cube)
    Physical Science The effect of _____________ on _____________ volume Mass of a metal
  • 4. Examples of experiments -B
    • How does initial height affect final velocity of a dropped ball?
      • we set up an experiment testing different initial heights (m) on the final velocity (in m/s) of a dropped basketball:
        • dependent variable (Y-axis)?
          • Final velocity(m/s)
        • independent variable (X-axis)?
          • Initial height (m)
    Physical Science The effect of on ____ Initial Height Final velocity
  • 5. Examples of experiments C
    • What’s the favorite candy bar of students?
      • we set up an experiment surveying students and asking which is their favorite candy bar :
        • dependent variable (Y-axis)?
          • number of students
        • independent variable (X-axis)?
          • type of candy
    Physical Science The effect of _____________ on _____________ Candy Bar type Number of students
  • 6. Making pictures out of data
    • Graphs
      • line graph
        • Use when data shows a trend or continuous change
      • bar graph (or histograms)
        • Use when graphing data that is in disconnected groups
    Physical Science
  • 7. Physical Science How does elevation affect temperature? elevation Temperature (•C) 1200 ft? 18 Line graph ! 5 10 15 20 25 30 0 500 1000 1500 2000 2500 0 elevation (feet above sea level) temp. (°C) 0 30 500 25 1000 20 1500 15 2000 10 2500 5 1200
  • 8. Physical Science Which Candy Bar do you like best? number of students Reese’s Cup?? RC RC Bar graph ! 1 2 3 4 5 6 Almond Joy Milky Way Ki t Kat Snickers M&Ms 0 Brand number Almond Joy 1 Milky Way 1 Kit Kat 4 Snickers 4 M&M’s 3