1. Circulatory System & Blood Composition | Structure of the circulatory system in horses, double circulation, blood vessel functions, and blood group classification. 2. Carbon Dioxide & Environmental Impact | Chemical reactions producing CO₂, effects of increasing atmospheric CO₂, classification as an acidic oxide, and dot-and-cross bonding diagram. 3. Renewable Energy & Wind Turbines | Advantages of wind energy, alternating current generator output, step-up transformer construction, and pressure-force calculations. 4. Photosynthesis & Energy Transfer | Balanced equation, enzyme activity effects, temperature limits, carbohydrate storage and transport, and specialized plant cell functions. 5. Organic Chemistry & Carbon Compounds | Identifying hydrocarbons, unsaturation, reaction types, homologous series properties, and isotopes of carbon. 6. Physics of Light & Motion in Water | Calculating speed of light, refractive index, kinetic energy of fish, force balance during movement, and drag effects. 7. Cell Division & Genetics | Chromosome numbers in mitosis and meiosis, gamete formation, parental cell structures, and uses of mitosis.