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Environments & Ecosystems

3rd Grade

Texas Essential Knowledge and Skills (TEKS): 3.9.A

observe and describe the physical characteristics of environments and how they support populations and communities of plants and animals within an ecosystem;

Texas Essential Knowledge and Skills (TEKS): 3.9.B

identify and describe the flow of energy in a food chain and predict how changes in a food chain affect the ecosystem such as removal of frogs from a pond or bees from a field; and

Texas Essential Knowledge and Skills (TEKS): 3.9.C

describe environmental changes such as floods and droughts where some organisms thrive and others perish or move to new locations.



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