1. pulse rate and exercise investigation, scientific enquiry types (fair test, pattern seeking, reliability), blood vessel types, effect of exercise on pulse 2. oxygen properties (low melting point, colorless), particle behavior in melting, physical characteristics like odorless and supports combustion 3. ray of light interactions, reflection at mirror, refraction in glass block, light path description through different materials 4. Solar System structure, orbit paths, planetary positions (Mars, Neptune), moon definition as a planet′s natural satellite 5. dissolving experiments, particle model of solution, effect of temperature on solubility, safety with hot water, accurate volume measurement 6. series vs parallel circuits, lamp brightness comparison, circuit function explanation, use of switches for control and safety in circuits