1.3 Measures and Accuracy

    Cards (147)

    • The unit for measuring volume is the liter
    • To convert 5 meters to feet, multiply 5 m by 3.28
    • How many fluid ounces are in 200 milliliters?
      6.8 fl oz
    • The metric system uses the meter as the standard unit for length.
    • How many pounds are in 8 kilograms?
      17.6 lb
    • 1 gram is approximately 0.035 ounces.

      True
    • What is the equivalent of 1 kilogram in pounds?
      2.2 pounds
    • 1 milliliter is equal to 0.034 fluid ounces.
    • When estimating, it's helpful to visualize common measurements like 1 meter or 1 kilogram.
    • To improve the accuracy of measurements, one should use more precise instruments.
    • How many feet are in 5 meters?
      16.4 feet
    • Estimating measurements is important for making quick and reasonable judgments
    • Using benchmarks like a standard door height of 2 meters helps in estimation.
    • Match the technique with its example:
      Compare to Known References ↔️ Estimating table height by comparing to waist height
      Visualize Common Measurements ↔️ Estimating room length by picturing meter sticks
      Use Benchmarks ↔️ Estimating bookshelf height by comparing to a door
      Round to Convenient Units ↔️ Estimating someone's height as 1.8 meters
    • What is one factor that affects the accuracy of a measurement?
      Precision of instrument
    • What is a method to reduce the impact of random errors in measurements?
      Take multiple measurements
    • Main rules for determining the number of significant figures
      1️⃣ Non-zero digits are always significant
      2️⃣ Zeros between non-zero digits are significant
      3️⃣ Leading zeros are not significant
      4️⃣ Trailing zeros in a number with a decimal point are significant
    • The measurement 3.450 has 4 significant figures.
    • The unit for measuring length is the meter
    • Match the metric unit with its imperial equivalent:
      1 meter ↔️ 3.28 feet
      1 kilogram ↔️ 2.2 pounds
      1 liter ↔️ 0.26 gallons
      1 centimeter ↔️ 0.39 inches
    • 1 liter is equivalent to 0.26 gallons.

      True
    • Match the metric unit with its imperial equivalent:
      1 meter ↔️ 3.28 feet
      1 kilogram ↔️ 2.2 pounds
      1 liter ↔️ 0.26 gallons
      1 centimeter ↔️ 0.39 inches
    • How many feet are in 5 meters?
      16.4 ft
    • To convert 200 milliliters to fluid ounces, multiply 200 mL by 0.034
    • 1 centimeter is equal to 0.39 inches.
    • How many gallons are in 1 liter?
      0.26 gallons
    • What are some examples of known references to use for estimating measurements?
      Hand span or foot length
    • What is the definition of accuracy in measurements?
      Closeness to the true value
    • What is the standard unit for measuring length?
      Meter
    • The square meter (m²) is used to measure area.
      True
    • Comparing an object to known references is a key step in estimating measurements.

      True
    • What is an example of a common measurement that can be visualized for estimation purposes?
      1 meter
    • What are the four key techniques used in estimating measurements?
      Compare, visualize, benchmark, round
    • Accuracy refers to how close a measurement is to the true or correct value
    • Using digital tools over analog tools increases measurement precision.
      True
    • Significant figures provide information about the precision and accuracy
    • Which type of zeros in a number are considered significant?
      Zeros between non-zero digits
    • How many significant figures does the measurement 10,000 have if there is no decimal point?
      1 or 4
    • Steps to round a measurement to significant figures
      1️⃣ Identify the number of significant figures required
      2️⃣ Look at the digit after the last significant figure
      3️⃣ Round up if the digit is 5 or greater
      4️⃣ Round down if the digit is 4 or less
    • Why is it important to round measurements to the appropriate number of significant figures?
      To communicate precision
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