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3-5
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ESS2.A: Earth materials and systems
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Four major Earth systems interact. Rainfall helps to shape the land and affects the types of living things found in a region. Water, ice, wind, organisms, and gravity break rocks, soils, and sediments into smaller pieces and move them around.
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3-5
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LS2.A: Interdependent relationships in ecosystems
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The food of almost any animal can be traced back to plants. Organisms are related in food webs in which some animals eat plants for food and other animals eat the animals that eat plants, while decomposers restore some materials back to the soil.
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6-8
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ESS2.A: Earth materials and systems
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Energy flows and matter cycles within and among Earth's systems, including the sun and Earth's interior as primary energy sources. Plate tectonics is one result of these processes.
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6-8
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LS2.A: Interdependent relationships in ecosystems
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Organisms and populations are dependent on their environmental interactions both with other living things and with nonliving factors, any of which can limit their growth. Competitive, predatory, and mutually beneficial interactions vary across ecosystems but the patterns are shared.
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9-12
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ESS2.A: Earth materials and systems
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Feedback effects exist within and among Earth's systems.
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9-12
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LS2.A: Interdependent relationships in ecosystems
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Ecosystems have carrying capacities resulting from biotic and abiotic factors. The fundamental tension between resource availability and organism populations affects the abundance of species in any given ecosystem.
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