Below is how the official curriculum organizes it. Each strand will get full lessons like the ones in Grade 1 Mathematics.
How living things depend on habitats; adaptations; human effects on habitats and restoring them
Natural and artificial light sources; shadows, reflection, refraction and dispersion; optical devices
Sources of sound and how it is detected; pitch and loudness; sound technologies
Properties of local rocks and minerals; their uses; weathering, erosion, fossils and landforms