1. Ecosystems and Food Chains – Identifying herbivores in a food web, role of decomposers, and predicting population changes due to environmental factors. 2. Forces and Motion – Effects of friction on movement, balanced vs. unbalanced forces, how applying force changes speed, and upthrust in floating objects. 3. States of Matter and Dissolving – Changes of state in wax, factors affecting dissolving, separating mixtures using filtration and evaporation, and solubility patterns in different liquids. 4. Electricity and Circuits – Identifying circuit components, increasing motor speed, using switches, and measuring current with appropriate instruments. 5. Human Biology and Adaptations – Pulse rate changes during exercise, circulatory system functions, effects of different habitats on plant adaptations, and classification of micro-organisms. 6. Scientific Investigation and Data Interpretation – Conducting fair tests, analyzing pulse rate trends in animals, constructing bar charts, and evaluating experimental reliability.