8 - Density II - Dec 1

What is the formula for calculating density?

• mass x volume

• mass/volume

• density/mass

• volume/mass

How is the displacement method used to measure the volume of an object?

• By counting the number of atoms in the object

• By measuring the change in mass of the water

• By using a ruler to estimate the volume

• By measuring the change in water level when the object is submerged in a container of water.

If the mass of an object is 50g and its volume is 25cm³, what is its density?

• 2 g/cm³

• 10 g/cm³

• 5 g/cm³

• 0.5 g/cm³

If the water level in a graduated cylinder rises from 20mL to 35mL after immersing an object, what is the volume of the object?

• 25mL

• 15mL

• 10mL

• 40mL

What is the density of a substance if it has a mass of 60g and a volume of 40cm³?

• 120g/cm³

• 0.67g/cm³

• 0.5g/cm³

• 1.5g/cm³

Explain the steps involved in using the displacement method to calculate the density of an object.

• Measure the volume of water displaced by the object when submerged in a graduated cylinder and use the formula Density = Mass / Volume to calculate the density.

• Use a ruler to measure the length, width, and height of the object and then divide by the mass to find the density

• Place the object on a scale and record the weight, then divide by the calculated volume to find the density

• Subtract the mass of the object from the mass of the water in the graduated cylinder to find the density

If the density of a substance is 2g/cm³, what does this value indicate about the substance?

• Relatively light

• Relatively heavy

• More dense than water

• Relatively small volume

• It's small in size

What is the density of an object with a mass of 120g and a volume of 90cm³?

• 0.75 g/cm³

• 1.3 g/cm³

• 30 g/cm³

• 210 g/cm³

How does the density of a substance affect its buoyancy in water?

• Less dense substances will float while more dense substances will sink.

• The density of a substance has no effect on its buoyancy in water.

• Buoyancy in water is determined by the outer coating of the substance, not its density.

• As long as the density is less than 5g/cm³ the object will float in water.

If the water level in a graduated cylinder rises from 50mL to 75mL when an object is immersed, what is the volume of the object?

• 20mL

• 15mL

• 5mL

• 10mL

• 25mL