Solids - Teacher Explanation

Welcome to lesson 4.6 on Solids, part of the Year 4 Unit on states of matter. Pupils are expected to compare and group materials into solids, liquids, and gases, while also considering health and safety aspects. During the lesson, it's important to be mindful of food allergies as some food items will be handled. Prior to distributing equipment, teachers should ensure that there are no sharp edges or broken parts that could pose a risk. Students are advised to wear safety goggles for practical activities and to wash their hands thoroughly afterwards. The lesson provides opportunities for cross-curricular learning, including writing scientific reports, graphing experimental results, and exploring historical contexts like weaponry in the Stone and Bronze Ages.

The concept of particles is a central theme, and the lesson includes a practical activity inspired by the ancient Greek philosopher Democritus, who pondered the nature of matter and introduced atomic theory. Children will attempt to tear a piece of paper into the smallest possible pieces, learning about the properties of particles and how they make up larger objects. They'll explore the arrangement of particles in different states of matter and their properties, using particle cards to aid their understanding. In a hands-on activity, pupils will make butter from double cream, observing the transformation of a liquid into a solid and noting changes in colour and consistency. This experiment not only illustrates the change of state but also introduces chemical reactions. Teachers should be aware of any students with lactose intolerance or other food allergies during this activity. The lesson aims to leave students with a better understanding of matter, its properties, and the concept of particles.