density rq pracical

• What does the density of a material tell us?

  The mass for a given volume
• How do you calculate density?

  Density = mass / volume
• What are the units of density?

  Kilograms per cubic meter
• Why is the density equation not provided in the exam?

  Students are expected to memorize it
• What are the two broad categories of objects based on density determination?

  Regular and irregular objects
• How can you measure the dimensions of regular objects?

  Using a ruler to measure each side
• How do you calculate the volume of a cube?

  Volume = side length cubed
• How do you determine the density of an irregular object?

  Using the displacement method
• What is the first step in determining the density of an irregular object?

  Find the mass using a balance
• What is a Eureka can used for?

  To measure displaced water volume
• What happens when you place an object in a Eureka can?

  Water is displaced and flows out
• How do you measure the volume of water displaced?

  Using a measuring cylinder
• What does the volume of displaced water equal?

  The volume of the object
• What can you calculate once you have the mass and volume of an object?

  You can calculate its density
• What are the steps to determine the density of a regular object?

  1. Measure the mass using a balance.
  2. Measure the length of each side with a ruler.
  3. Calculate the volume using side length cubed.
  4. Use the density formula: density = mass / volume.
• What are the steps to determine the density of an irregular object?

  1. Measure the mass using a balance.
  2. Fill a Eureka can with water.
  3. Place the object in the water to displace it.
  4. Measure the volume of displaced water.
  5. Use the density formula: density = mass / volume.
• What is the significance of the density practical in exams?

  • It is a required practical.
  • It could appear as an exam question.