Aiming for Grade 4 LOs:

• State that the melting point of a substance is the temperature at which it changes from a solid to a liquid and vice versa.
• State that the boiling point of a substance is the temperature at which it changes from a liquid to a gas and vice versa.
• Describe the process of melting and boiling.

Aiming for Grade 6 LOs:

• State that the melting and boiling points of a pure substance are fixed.
• Use the term ‘latent heat’ to describe the energy gained by a substance during heating for which there is no change in temperature.
• Find the melting or boiling point of a substance by using a graphical technique.

Aiming for Grade 8 LOs:

• Describe how the melting points and boiling points of a substance can be changed.
• Describe in detail the behaviour of the particles during changes of state.
• Evaluate data produced by a heating experiment to discuss the reproducibility of the measurement of a melting point.