1. Life Cycles of Flowering Plants: Differences between flowering and non-flowering plants, pollination process and seed formation, seed dispersal mechanisms, stages of seed germination. 2. Sound: Mechanism of sound production, relationship between volume and pitch, factors affecting sound intensity, changes in pitch perception. 3. States and Properties of Matter: Characteristics of gases, unique properties of water, processes of evaporation and condensation, formation and behavior of solutions. 4. The Digestive System: Structure and function of digestive organs, importance of a balanced diet in maintaining health.