Texas TEKS Standards
TX.112.16. Science, Grade 5.
(5.9) Organisms and environments. The student knows that there are relationships, systems, and cycles within environments. The student is expected to:
5.9 (B) Describe how the flow of energy derived from the Sun, used by producers to create their own food, is transferred through a food chain and food web to consumers and decomposers.
5.9 (D) Identify the significance of the carbon dioxide-oxygen cycle to the survival of plants and animals.