Physics KS9 8.9: Density

Give one reason why the density of iron is higher than the density of oxygen

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Explain why pumice floats and why ironwood sink

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Aanjay and Faisyal are talking about why pieces of two different metal that are the same size have very different masses. Aanjay says that the particles must be different masses, and Faisyal says that it is to do with how the particles are arranged. Who is correct?

• Aanjay

• Faisyal

• Both

• None

Answer explanation

If the particles are arranged differently, it might affect the object's density. However, mass of an object depends on the mass of individual particles and the question is about the mass.

Mercury is a liquid metal with a density of 13.6 g/cm^3. Water has a density of 1.0 g/cm^3.

Gold has a density of 19.3 g/cm^3. Will it float or sink in

a) mercury

b) water?

put your answers next to each other. eg float, sink

Mercury is a liquid metal with a density of 13.6 g/cm^3. Water has a density of 1.0 g/cm^3.

Silver has a density of 10.5 g/cm^3. Will it float or sink in

a) mercury

b) water?

Mercury is a liquid metal with a density of 13.6 g/cm^3. Water has a density of 1.0 g/cm^3.

Wood has a density of 0.8 g/cm^3. Will it float or sink in

a) mercury

b) water?