Identify some of the organisms that live together in an ecosystem.
Understand that the elements of natural systems are interdependent.
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Identify how the natural made world and the human made world are different.
Identify that some systems are found in nature and some systems are made by humans.
Describe the basic needs of living things and their dependence on light, food, air, water, and shelter.
Describe the basic needs of plants and animals and their dependence on light, food, air, water, and shelter.
Identify the living and nonliving components of an ecosystem (e.g., living [plants, animals]; nonliving [water, soil, air]).