The exam evaluates biology, chemistry, and physics concepts, focusing on photosynthesis, sedimentary rock layers, and reactivity series. Key topics include density calculations, reflection of light, water retention in soils, and adaptations of organisms. Investigations explore heat transfer mechanisms, metal-acid reactions, electrical circuits, and sampling techniques in ecosystems. Practical applications assess thermal insulation in birds, identification of atom components, and the creation of salts through chemical reactions. Questions emphasize experimental design, data interpretation, and understanding energy transfer and material properties. Keywords: biology, chemistry, physics, photosynthesis, reactivity series, soil analysis, light reflection, energy transfer, STEM education, experimental science.