1. Earth and space: layers of Earth (core, mantle, crust), Solar System components (planets, Sun, other objects), model inaccuracies, examples of planets 2. Animals and skeletons: grouping vertebrates vs. invertebrates, external skeleton (exoskeleton), skeleton functions (movement, protection) 3. Electricity and materials: identifying conductors and insulators, copper as conductor, energy conversion in home devices (movement, sound, light, heat) 4. Light and reflection: ray diagram showing light direction and reflection from mirror, light travels in straight lines, reflection principle 5. Changes of state: melting of ice (solid to liquid), reverse by freezing, matter made of particles, chemical reaction evidence (gas production, new substance) 6. Health and disease: measles infection data, effect of vaccination drop, medicine safety cap importance, infectious disease prevention via vaccines