Science, 2009
  Grade Level:   4-5  
  EALR 1:   Systems  
  Big Idea:   Systems (SYS)  
  Core Content:   Complex Systems                   
  Description:   In prior grades students learned to think systematically about how the parts of objects, plants, and animals are connected and work together. In grades 4-5 students learn that systems contain smaller (sub-) systems, and that systems are also parts of larger systems. The same ideas about systems and their parts learned in earlier grades apply to systems and subsystems. In addition, students learn about inputs and outputs and how to predict what may happen to a system if the system's inputs are changed. The concept of a hierarchy of systems provides a conceptual bridge for students to see the connections between mechanical systems (e.g., cities) and natural systems (e.g., ecosystems).  
  Content Standard:   4-5 SYSD One defective part can cause a subsystem to malfunction, which in turn will affect the system as a whole.  
Students are expected to:
  • Predict what might happen to a system if a part in one or more of its subsystems is missing, broken, worn out, mismatched, or misconnected (e.g., a broken toe will affect the skeletal system, which can greatly reduce a person's ability to walk).*a
    Mathematics Connection
  • *a    4.5.J, 5.6.J    Make and test conjectures based on data (or information) collected from explorations and experiments.