The particle model is widely used to predict the behaviour of solids, liquids and gases and this has many applications in everyday life. It helps us to explain a wide range of observations and engineers use these principles when designing vessels to withstand high pressures and temperatures, such as submarines and spacecraft. It also explains why it is difficult to make a good cup of tea high up a mountain!
Lesson Objectives:
Define the term ‘density’.
Calculate the volume of some regular shapes.
Explain why some materials will float on water.
Calculate the density of materials.
Measure the density of a solid and a liquid.
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Lesson Objectives:
Describe the arrangement of the particles in a solid, liquid, and gas.
Explain the behaviour of a material in terms of the arrangement of particles within it.
State that there are changes in stores of energy associated with a material when its temperature is increased.
Describe the changes in behaviour of the particles in a material during changes of state.
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Lesson Objectives:
Identify which changes of state are related to increases in internal energy and which are related to decreases.
Describe how the behaviour of particles changes as the energy of a system increases.
Measure the latent heat of vaporisation for water.
Calculate the latent heat of fusion and latent heat of vaporisation for a substance.
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Lesson Objectives:
State that as the temperature of a gas in a sealed container increases, the pressure of the gas increases.
Describe the behaviour of particles in a gas as the gas is heated.
Outline Brownian motion and how this provides evidence for the particle nature of matter.
Describe the relationship between an increase in the temperature of a fixed volume of a gas and the increase in pressure of the gas.
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