3.1.2 Measuring Density

    Cards (38)

    • The formula for density is Density = Mass / Volume
      True
    • What are the common units for density?
      kg/m³ and g/cm³
    • Denser materials have a higher mass per unit volume compared to less dense materials

      True
    • What is density a measure of?
      Mass in a given volume
    • Density is calculated using the formula: Density = Mass / Volume
    • Match the material with its density in kg/m³:
      Water ↔️ 1000
      Aluminum ↔️ 2700
      Steel ↔️ 7850
      Gold ↔️ 19300
    • What tool is used to measure mass?
      Balance or scale
    • Mass is a fundamental property of an object and is conserved
      True
    • Density is measured in kilograms per cubic meter or grams per cubic centimeter.

      True
    • Mass is conserved, meaning it cannot be created or destroyed.
    • Steps to measure the volume of a regular-shaped object
      1️⃣ Measure the dimensions
      2️⃣ Apply the correct formula
      3️⃣ Calculate the volume
    • When measuring the volume of a rock, the initial volume of water is subtracted from the final volume with the rock.

      True
    • An object with a mass of 50 grams and a volume of 20 cm³ has a density of 2.5 g/cm³.
      True
    • Match the material with its density:
      Water ↔️ 1000 kg/m³
      Aluminum ↔️ 2700 kg/m³
      Gold ↔️ 19300 kg/m³
    • What does it mean for mass to be conserved?
      It cannot be created or destroyed
    • Mass is a measure of the amount of matter in an object and remains constant regardless of location.

      True
    • What formula is used to calculate the volume of a cube?
      V=V =s3 s^{3}
    • Steps to measure the volume of an irregular shape
      1️⃣ Add known volume of liquid to a measuring cylinder
      2️⃣ Place the object in the cylinder
      3️⃣ Measure the new volume
      4️⃣ Subtract the initial volume from the new volume
    • What is the density of an object with a mass of 50 g and a volume of 20 cm³?
      2.5 g/cm³
    • To convert 1 kg/m³ to g/cm³, multiply by 0.001
    • What method is used to measure the density of a regular-shaped cube?
      Measure side length with ruler
    • Systematic errors are consistent errors caused by instrument calibration issues or experiment flaws
    • How can the impact of random errors be reduced?
      Averaging multiple readings
    • The balance displays the mass in grams or kilograms
    • What does density measure?
      Mass per unit volume
    • Steps to measure the mass of an object
      1️⃣ Place the object on a balance
      2️⃣ Read the mass value
      3️⃣ Note the units of measurement
      4️⃣ Understand that mass is conserved
    • Volume is the amount of space an object occupies.

      True
    • For irregular shapes, the volume can be measured using a measuring cylinder.
    • What does volume measure?
      Space an object occupies
    • Denser materials like gold have a higher mass per unit volume compared to less dense materials like water.

      True
    • To measure the mass of an object, place it on one side of a balance or scale
    • What is the mass of the apple in the example table?
      150 grams
    • What is the formula to calculate the volume of a cylinder?
      V=V =πr2h \pi r^{2} h
    • The density formula is Density=Density =MassVolume \frac{Mass}{Volume}.

      True
    • What are two common units for density?
      kg/m³ and g/cm³
    • 1 g/cm³ is equal to 1000 kg/m³.
      True
    • What are two common types of measurement errors?
      Systematic and random errors
    • Random errors occur predictably due to uncontrolled factors.
      False