1. Living Things and Biological Processes: Functions of bones and skeletons; importance of skeleton movement; different classifications of skeletons; role of molecules in infectious diseases. 2. Energy and Forces: Sources and transfers of energy; changes in energy states; forces and their interactions in biological and physical systems. 3. Materials and Chemical Reactions: Properties of materials and their structures; behavior of solids, liquids, and gases; melting and boiling processes; types of chemical reactions. 4. Earth, Space, and Environmental Science: Structure of the Earth; volcano formation; causes and effects of earthquakes; diversity of habitats and ecosystems. 5. Light and Optics: Behavior of light in different environments; how light travels; function of the solar system; causes of day and night; investigation of light shadows. 6. Electricity and Circuits: Conductors and insulators in circuits; relationship between current and voltage; understanding electrical pathways; role of components in a circuit.