Req Pratical: Density

• What does the density of a material tell us?

  The mass for a given volume
• How is density calculated?

  Density equals mass divided by volume
• What is the unit of density?

  Kilograms per cubic meter
• How are objects categorized when determining density?

  Into regular and irregular objects
• Why is it easy to measure the dimensions of regular objects?

  They have dimensions that are easy to measure
• How do we determine the density of a regular object?

  By measuring mass and volume
• How do you find the mass of an object?

  Using a top-pan balance
• How do you calculate the volume of a cube?

  Length of side cubed
• How do we 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
• How do you measure the volume of water displaced?

  Using a measuring cylinder
• What happens when you place an object in water in a Eureka can?

  Water is displaced and flows out
• 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 the side with a ruler.
  3. Calculate the volume by cubing the length.
  4. Use the 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 formula: Density = Mass / Volume.