1. The document contains questions and exercises about light and magnetism for primary school students. It includes topics like the properties of light, formation of shadows, reflection, refraction, the visible spectrum, and seeing colored objects.
2. The second part of the document is about magnetism. It discusses natural and artificial magnets, magnetic and non-magnetic materials, the properties of magnets including attraction and repulsion of poles.
3. The last section covers electromagnets, how they are made, and their uses. It also explains how dynamos generate electric current using magnets and how this principle is applied in hand cranks on bicycles.