Unit 4.2 Ecosystems and Change Over Time
At the reinforcement level of instruction, grade 4 students identify sources of energy needed for the survival of organisms (e.g., light and food). They explain how plants and animals within a habitat depend on each other. Students also explain what living things might do if their environment changes, including the impact that fire, weather, or humans have on an ecosystem. Students continue to design habitats, and explain how the habitat provides for the needs of the organisms that live there.
At the introductory level of instruction, students explain how the balance of the ecosystem can be disturbed (e.g., overpopulation).
(From work completed by Cranston Public Schools in collaboration with the Charles A. Dana Center at the University of Texas at Austin)
At the introductory level of instruction, students explain how the balance of the ecosystem can be disturbed (e.g., overpopulation).
(From work completed by Cranston Public Schools in collaboration with the Charles A. Dana Center at the University of Texas at Austin)