1. Polar bear adaptations: insulation and predation features, environmental survival traits, hunting mechanisms 2. Particle model: solid–liquid transitions (melting/freezing), differences (arrangement), similarities (contact), gas particle diagram 3. Sound and pitch: drum vibration, loudness increase by force, pitch controlled by shell size and material tightness 4. Atmosphere and pollution: air layer = atmosphere, gases = oxygen, nitrogen, carbon dioxide, pollution as harmful environmental change 5. Flower-bee experiment: controlled variables (time, type of plant, flower number), risk (bee stings), extended duration for accuracy, bees prefer blue 6. Magnetism and forces: magnetic vs. magnetic material, attraction and repulsion between poles, force decreases with distance, identification of gravity, friction, air/water resistance