Science, 2009
  Grade Level:   4-5  
  EALR 4:   Life Science  
  Big Idea:   Ecosystems (LS2)  
  Core Content:   Food Webs                   
  Description:   In prior grades students learned that ecosystems include both plant and animal populations as well as nonliving resources, and that plants and animals depend on one another and on the nonliving resources in their ecosystem to survive. In grades 4-5 students learn how ecosystems change and how these changes affect the capacity of an ecosystem to support populations. Some changes in ecosystems are caused by the organisms themselves. The ability of any organism to survive will depend on its characteristics and behaviors. Humans also play an important role in many ecosystems and may reduce negative impacts through thoughtful use of natural resources. Concepts related to ecosystems, including food webs, make it possible for students to understand the interrelationships among various forms of life and between living things and their environment.  
  Content Standard:   4-5 LS2B Plants make their own food using energy from the sun. Animals get food by eating plants and/or other animals that eat plants. Plants make it possible for animals to use the energy of sunlight.  
Students are expected to:
  • Explain that plants make their own food, and animals, including humans, get food by eating plants and/or eating other animals.