Density Measurement

A student wishes to determine the density of an irregularly-shaped stone.
First he finds the mass of the stone. Next he lowers the stone into a measuring cylinder containing water.
The diagrams show the measuring cylinder before and after the stone is lowered into it.

How should the student calculate the density of the stone?

• 1. mass of stone × reading 2

• 1. mass of stone × (reading 2 – reading 1)

• 1. mass of stone ÷ reading 2

• 1. mass of stone ÷ (reading 2 – reading 1)

Diagram 1 shows a measuring cylinder containing water.

Diagram 2 shows the same measuring cylinder and water after 10 identical solid glass spheres have been added.

The mass of one of the spheres is 10 g.
What is the density of the glass from which the spheres are made?

• 0.25g/mL

• 0.40g/mL

• 2.5g/mL

• 4.0g/mL

Liquids have the least density.

• True

• False

Particles of _________ have the lowest kinetic energy.

Gases have the highest intermolecular distances.

• True

• False

Using a measuring cylinder, we cannot measure the density of a liquid.

• True

• False

Finish the formula: Force = Mass * _________

• Velocity

• Weight

• Acceleration

• Temperature

• Momentum

Which liquid is the least dense?

• oil

• water

• syrup

• plastic bottle

Which method of determining mass involves measuring how much an object resists acceleration?

• Inertial mass

• Atomic mass

• Gravitational mass

• Newton mass

• None of the Above

The law of _________ of mass states that the mass of a closed system must remain constant over time.

• Weight

• Density

• Consistency

• Elasticity

• Conservation