Performance Standards By the end of grade 4, students will: Energy and Ecosystems Describe the flow of energy in natural systems, citing the sun as the source of energy on the earth;
(students; will Describe; the flow of energy in natural systems) Context(students will Describe,List([45, 90))):(students; will Describe the flow of energy in natural systems citing; the sun; as the source of energy on the earth)
students will Describe,List([45, 90))
students students
will Describe will Describe the flow of energy in natural systems citing
the flow of energy in natural systems
the sun as the source of energy on the earth