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Unit 1 Lecture 3

Unit 1 Lecture 3. Variables Data Processing Graphs. Variables. Sample Problems. Research questions are listed below. For each question identify the independent variable, dependent variable and constants. How much water flows through a faucet at different openings?

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Unit 1 Lecture 3

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  1. Unit 1 Lecture 3 Variables Data Processing Graphs

  2. Variables

  3. Sample Problems • Research questions are listed below. For each question identify the independent variable, dependent variable and constants. • How much water flows through a faucet at different openings? • Does heating a cup of water allow it to dissolve more sugar? • Does fertilizer make a plant grow bigger? • Does an electric motor turn faster if you increase the voltage?

  4. Data Processing • Review your data and ask yourself these questions • Is it complete or did I forget something? • Do I need to collect more data? • Did I make any mistakes in collecting the data? • Is there a pattern to my data? • Did I perform multiple trials?

  5. Data Processing • For multiple trials average the data you collected to obtain a mean • Mean = (Trial 1 + Trial 2 + Trial 3 +...) Number of trials • Example: • In an experiment you recorded the following data: trial 1 = 10cm; trial 2 = 15cm; trial 3 = 30 cm; trial 4 = 20cm; trial 5 = 25cm • Calculate the mean for this experiment

  6. Graphs • All graphs should have • A title • Axis labels • Units • Appropriate scaling • A legend

  7. Types of graphs

  8. Graph Checklist

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