Conclusions, Evaluations and Units

• What is the purpose of drawing conclusions in an investigation?

  To state the relationship between variables
• How should a conclusion be justified?

  Using specific data from the investigation
• What should be referred to when concluding an investigation?

  The original hypothesis and supporting data
• What is an evaluation in the context of an investigation?

  • A critical analysis of the whole investigation
  • Considers validity, reliability, and accuracy
  • Examines control of variables and results
• What factors should be considered in an evaluation?

  Validity, reliability, accuracy, and precision
• Why is it important to control variables in an investigation?

  To ensure the validity of the results
• What does the reliability of results refer to?

  The consistency of results across trials
• What should be done if anomalous results are found?

  Investigate causes and repeat the experiment
• How can repeating an experiment improve confidence in conclusions?

  By enhancing the quality of results obtained
• What are S.I. units?

  • A set of standard units used by scientists
  • Includes base units for measurement
• What is a scaling prefix?

  A word or symbol indicating a multiplying factor
• What are the base units in S.I. units?

  • Mass: kilogram (kg)
  • Length: meter (m)
  • Time: second (s)
  • Amount of substance: mole (mol)
  • Temperature: kelvin (K)
• What is the prefix for a factor of $10^3$?


  Kilo (k)
• What is the prefix for a factor of $10^6$?


  Mega (M)
• What is the prefix for a factor of $10^9$?


  Giga (G)
• What is the prefix for a factor of $10^{-3}$?


  Milli (m)
• What is the prefix for a factor of $10^{-6}$?


  Micro (µ)
• What is the prefix for a factor of $10^{-9}$?


  Nano (n)
• What is the S.I. unit for temperature?

  Kelvin (K)
• What is the S.I. unit for mass?

  Kilogram (kg)
• What is the S.I. unit for length?

  Meter (m)
• What is the S.I. unit for the amount of substance?

  Mole (mol)
• What is the S.I. unit for time?

  Second (s)
• What is the S.I. unit for the amount of a mole?

  Mole (mol)