3.1.2 Measuring Density

• 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 =$$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 =$$\pi r^{2} h$
• The density formula is $Density =$$\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