1. Living Things: Characteristics of animals and plants, plant structure and functions, role of light in plant growth, importance of water for plants. 2. Sound: Sources of sound, variations in loudness and quietness, movement and propagation of sound. 3. Materials in My World: Types of materials, properties affecting usage, classification methods, material transformations. 4. The Earth: Overview of planet Earth, impact of sunlight on temperature and life, types and properties of rocks, composition and significance of soil.