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L3 key terms and ideas

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  • What must every scientific measurement include?
    Only a number
    Only a unit
    A symbol
    A numerical value and a unit
  • What does “unit of measurement” mean?
    The value of an error
    A conversion factor
    A scientific equation
    Word or phrase for types of measurements
  • What is the denominator?
    Numbers and units on bottom
    The vinculum
    Numbers and units on top
    The accepted value
  • What is the SI system also called?
    The decimal system
    The metric system
    The imperial system
    The customary system
  • What does percent error compare?
    Numerator to denominator
    SI units to imperial units
    Measured value to accepted value
    Equation to conversion factor
  • What is the base word for mass in SI?
    Milligram
    Gram
    Kilogram
    Centigram
  • What does the Greek symbol μ (mu) represent?
    Micro (one-millionth)
    Milli (one-thousandth)
    Nano (one-billionth)
    Mega (one million)
  • What is dimensional analysis used for?
    Measuring distance
    Finding volume only
    Guessing values
    Keeping track of units with algebra
  • What is dimensional analysis?
    Eliminating decimals from a number
    Comparing two numbers without units
    Changing units while keeping the same quantity
    Measuring mass only
  • What does “Top Times Denominator Divide” help with?
    Calculator input
    Measuring volume
    Identifying SI units
    Finding percent error
  • What does the numerator of a conversion factor contain?
    A different unit
    The same unit
    A decimal value
    No unit
  • What method helps build ratios for conversions?
    Tree diagram
    GUESS method
    Train track method
    Long division
  • What is percent error?
    The exact accepted value
    The number of conversions made
    The percent of correct answers
    How off your answer is from the accepted result
  • How do chemists find their error?
    By removing units
    By guessing values
    By calculating percent error with GUESS
    By measuring mass only
  • What is the numerator?
    Numbers and units on top
    The horizontal line
    Numbers and units on bottom
    The error amount
  • What is a vinculum?
    The line that means divide
    The denominator
    The equal sign
    The numerator
  • What is an equation?
    A math sentence with good grammar
    A guess
    A fraction without variables
    Only numbers without units
  • What does the denominator of a conversion factor contain?
    The same as numerator
    Always grams
    No number
    A different unit
  • What is the base unit for mass in SI?
    Kilogram
    Gram
    Mole
    Liter
  • What is the measured value?
    The error
    The conversion factor
    The value you obtain in an experiment
    The accepted value
  • What is the accepted value?
    The percent you calculate
    The correct value used for comparison
    The conversion factor
    The number you measured
  • Which method uses brackets to help cancel units?
    Substitution method
    Long division
    Factor tree method
    Train track method
  • What do conversion factors always equal?
    Zero
    One hundred
    One
    Ten
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