3.1.1 Calculating Density

    Cards (129)

    • Density is a measure of how much mass is contained in a given volume of a substance.volume
    • The density formula is
    • The common units for density are kilograms per cubic meter (kg/m³) and grams per cubic centimeter
    • Match the material with its density in kg/m³:
      Water ↔️ 1000
      Iron ↔️ 7874
      Air ↔️ 1.225
      Gold ↔️ 19300
    • What is the density formula?
    • Water has a density of 1000 kg/m³ or 1 g/cm³, while iron has a density of 7874 kg/m³ or 7.874 g/cm³.
    • Order the components of the density formula from largest to smallest:
      1️⃣ Volume
      2️⃣ Mass
      3️⃣ Density
    • If a piece of iron has a mass of 15.7 kg and a volume of 0.002 m³, what is its density?
    • Match the variable with its symbol:
      Density ↔️
      Mass ↔️ m
      Volume ↔️ V
    • What is the formula for density?
    • Density is the amount of mass per unit volume
    • In what units is volume typically measured?
      m³ or cm³
    • Calculate the density of a piece of iron with a mass of 15.7 kg and a volume of 0.002 m³.
    • Match the variable with its symbol and units:
      Density ↔️ , kg/m³ or g/cm³
      Mass ↔️ , kg or g
      Volume ↔️ , m³ or cm³
    • Density is measured in kilograms per cubic meter (kg/m³) or grams per cubic centimeter (g/cm³).
    • Kilograms per cubic meter (kg/m³) are used for larger objects or volumes
    • What are two common tools used in labs to measure mass accurately?
      Triple beam balance and electronic balance
    • A triple beam balance is typically accurate to 0.1 g.
    • To calibrate an electronic balance, press the "Tare" button.
    • Steps for using a triple beam balance:
      1️⃣ Ensure the beams are set to zero.
      2️⃣ Adjust the zero-adjustment screw.
      3️⃣ Place the object on the weighing pan.
      4️⃣ Slide the largest beam first.
      5️⃣ Repeat with smaller beams until balanced.
      6️⃣ Sum the positions of all beam riders.
    • Match the material with its density in kg/m³ and g/cm³:
      Water ↔️ 1000 kg/m³, 1 g/cm³
      Iron ↔️ 7874 kg/m³, 7.874 g/cm³
      Gold ↔️ 19300 kg/m³, 19.3 g/cm³
      Air ↔️ 1.225 kg/m³, 0.001225 g/cm³
    • The precision of a triple beam balance is 0.1 grams.
    • The electronic balance uses a simple digital display.
    • Which balance is more portable, the triple beam balance or the electronic balance?
      Triple beam balance
    • The electronic balance is less expensive than the triple beam balance.
      False
    • Steps for using the triple beam balance
      1️⃣ Adjust the zero-adjustment screw
      2️⃣ Place the object on the weighing pan
      3️⃣ Slide beams until balanced
      4️⃣ Read the sum of beam riders' positions
    • Precise measurement of mass is crucial for determining the density of an object.
    • The precision of an electronic balance is 0.01 grams or more.
    • Why does the triple beam balance require practice to use effectively?
      Manual adjustments needed
    • The electronic balance is durable and portable.
      False
    • How do you read the mass using a triple beam balance?
      Sum beam riders' positions
    • The electronic balance does not require calibration.
      False
    • To calibrate an electronic balance, you must press the Tare button.
    • Steps for using the triple beam balance
      1️⃣ Zeroing
      2️⃣ Placement
      3️⃣ Adjusting Beams
      4️⃣ Reading Mass
    • When using an electronic balance, the mass is displayed on a digital screen.
    • What does the "Tare" button do on an electronic balance?
      Resets display to zero
    • The precision of the triple beam balance is 0.1 g
    • The first step in using the triple beam balance is zeroing
    • Steps for using the electronic balance
      1️⃣ Calibration
      2️⃣ Placement
      3️⃣ Reading Mass
    • The "Tare" button on the electronic balance is used for calibration.