1. Digestion and Nutrition: Digestive system parts (mouth, stomach, small intestine, anus); stomach produces acid; balanced diet = correct nutrients. 2. Gases and Magnetism: Nitrogen and oxygen = main air gases; magnet length affects strength; magnetic materials attract. 3. Water and States of Matter: Evaporation, condensation, precipitation; freezing water expands; pure water in rivers/lakes. 4. Investigations and Variables: Germination needs water and warmth; control and independent variables; filtration separates solids. 5. Forces and Sound: Windsurfing forces (applied, friction, gravity, upthrust); sound via vibration; pitch changes with tension/thickness. 6. Adaptations and Seasons: Water lily floats, wide leaves, bright flowers; Earth’s tilt causes summer in one hemisphere.