1. Biology: food constituent analysis (carbs, fats, vitamin C), respiration path (nose → alveolus → blood), photosynthesis gas output and influencing factors (light, temperature), exercise and fitness (heart rate graphs), animal diet effects (milk study on rats). 2. Chemistry: rusting investigation (salt effect, oxygen role), compound formation (e.g. CaCO₃ → CaO + CO₂), reactivity and physical properties (melting point, conductivity), compound definitions, copper and chlorine structure and uses. 3. Physics: light behavior (refraction, shadow size, angle measurements), sound wave properties (vibrations, pitch, compressions), pressure and gas particle behavior, electromagnet construction and advantage, magnetic field reversal drawing. 4. Scientific method: fair testing in rusting and light experiments, graph drawing (distance-time), result table creation (angle measurements), pattern interpretation in long-term trends (world record speed), consistent control of variables. 5. Data interpretation: graph analysis (rat growth, athlete fitness, light absorption), speed calculation from time-distance graph, temperature effect on vitamin C retention in food, classification of true/false scientific statements.