Solids and Liquids – Changing State. Learning Objective; to understand that the same material can exist as both solid and liquid. Think about the different materials that you have seen at different points during today’s lesson. Use this sheet to record how 2 of those materials can exist as both a solid and a liquid. Use the questions in the stars to help you write your explanations. Material one as a solid Material one as a liquid Material two as a solid Material two as a liquid What did we do to the material? Can you scientifically name the processes? What are its uses in both states? How long did it take? How do we ensure that we keep the material in the state we want it?