1. Plants and growth: plant parts (roots), water transport through stem, plant growth affected by light, survival during drought, and helping a wilted plant recover 2. Materials and properties: properties of steel, gold, wool, and salt; choosing suitable materials for bridges, saucepans, and shirts based on strength, conductivity, melting point 3. Forces and motion: push/pull forces, skateboard speed and friction, water resistance in puddles, measuring balloon rocket motion, identifying forces in fair tests 4. Scientific investigations: fair testing (pulse rate, towel absorption), comparing towel absorption with bar chart, effects of exercise on heart rate, variables and predictions 5. Classification and senses: animal grouping by wings or water habitat, classifying materials, using smell to detect scents, interpreting material tables 6. States of matter and changes: water absorption, flammable materials, balloon motion due to air release, sorting by material state (solid, liquid, gas), effect of temperature on materials and states of matter