How can you separate sand, salt and water? - Presentation

Separating a mixture of sand, salt, and water is a classic science experiment that demonstrates the principles of solubility and changes of state. To embark on this investigation, pupils are first encouraged to engage with educational resources, such as watching a specific internet video which provides foundational knowledge on evaporation and condensation. With a solid grasp of these concepts, students are then ready to plan and execute an experiment to separate the three components. The process involves discussion, planning, resource gathering, and carrying out the experiment, followed by writing up the findings. Key terms such as 'planning', 'learning', and 'evaluation' are used to structure the stages of the investigation and to reflect upon the outcomes and the learning process.

Detailed teacher's notes guide the students through the stages of the investigation. During the 'Planning' stage, students clarify the objectives and challenges, considering their previous knowledge of evaporation and the resources needed. The 'Doing' stage involves collaboration and flexibility, as students may need to adapt their plans based on the group's ideas and the practicalities of the experiment. Finally, in the 'Evaluative' stage, students reflect on what went well, what could be improved, and the lessons learned that can be applied to future scientific inquiries. This structured approach not only teaches the scientific method but also encourages critical thinking, teamwork, and the ability to adapt and learn from the experimental process.