3.2 SIMPLE MACHINES: investigate and understand simple machines and their uses: a) types of simple machines (lever, screw, pulley, wheel and axle, inclined plane, and wedge); b) how simple machines function; c) compound machines (scissors, wheelbarrow, and bicycle); and d) examples of simple and compound machines found in the school, home, and work environment.
3.3 MATTER: investigate and understand that objects are made of materials that can be described by their physical properties.
3.4 ANIMAL ADAPTATIONS: investigate and understand that behavioral and physical adaptations allow animals to respond to life needs.
3.5 FOOD CHAINS: investigate and understand relationships among organisms in aquatic and terrestrial food chains.
3.6 ENVIRONMENTS: investigate and understand that environments support a diversity of plants and animals that share limited resources.
3.7 SOIL: investigate and understand the major components of soil, its origin, and importance to plants and animals including humans.
3.8 PATTERNS AND CYCLES: investigate and understand basic patterns and cycles occurring in nature.
3.9 WATER CYCLE: investigate and understand the water cycle and its relationship to life on Earth.
3.10 NATURAL EVENTS: investigate and understand that natural events and human influences can affect the survival of species.
3.11 ENERGY: investigate and understand different sources of energy.