1. Electrical science—conductors vs insulators, circuit brightness improvement, material testing procedures, data accuracy and conclusion 2. Dissolving and solubility—investigating solubility of solids in water, effect of temperature, drawing and labeling bar charts, reversible vs irreversible changes 3. Human biology—functions of heart and circulatory system, organ labeling, heart machines, mass vs weight concepts and units 4. Materials and recycling—recyclable and non-recyclable items, environmental impact of waste, sustainable alternatives like reusable diapers 5. Food chains and ecosystems—producer identification, direction of energy flow, food web structure, separation techniques (filtration, residue, solution) 6. States of matter—solutes and solvents, solutions, sugar dissolving explanation, color changes during mixing, filtration of mixtures (e.g., copper sulfate and sand)