Matter is made up of small particles called atoms. The particles in a solid, liquid or gas are arranged differently. Density depends on how closely packed the particles are.

What changes take place to the arrangement of the particles when a solid melts into a liquid?

The particles remain tightly packed and are unable to move past each other

The particles remain tightly packed but can also move past each other

The particles pack together even closer

In which state of matter are the particles tightly packed in a regular structure?

In a solid

In a liquid

In a gas

What is the equation for density?

Mass × volume

Volume ÷ mass

Mass ÷ volume

What is the mass of a 5 cm^{3} block of iron that has a density of 7.8 g/cm^{3}?

1.56 g

0.64 g

39 g

What is the volume of a cube whose sides are 2 cm long?

8 cm^{3}

4 cm^{3}

2 cm^{3}

What is the density of a rock if it has a mass of 1,500 kg and a volume of 0.5 m^{3}?

750 kg/m^{3}

3,000 kg/m^{3}

7,500 kg/m^{3}

What is the mass of 15 cm^{3} volume of material that has a density of 50 g/cm^{3}?

750 g

0.3 g

3.33 g

A block of iron has sides of 3 cm, 4 cm and 5 cm. Its mass is 468 g. What is its density?

39 g/cm^{3}

7.8 g/cm^{3}

9.0 g/cm^{3}

What is the volume of 300 kg of water if it has a density of 1,000 kg/m^{3}?

30 m^{3}

3 m^{3}

0.3 m^{3}

A lump of granite of mass 80 g is immersed in a measuring cylinder of water. The reading increases from 20.0 cm^{3} to 49.6 cm^{3}. What is the density of granite?

2.7 g/cm^{3}

27 g/cm^{3}

1.6 g/cm^{3}