Science Worksheets and Study Guides Seventh Grade. Ecosystems, food chains and food webs

The resources above correspond to the standards listed below:

Delaware Standards

DE.8. Ecology
8.1. Interactions within the Environment
Enduring Understanding: Organisms and their environments are interconnected. Changes in one part of the system will affect other parts of the system.
8.1.A. All populations living together (biotic factors) and the physical factors with which they interact (abiotic factors) compose an ecosystem. (Level: Essential)
8.1.B. Ecosystems do not have precise boundaries. All ecosystems ultimately exchange materials with one another and all influence one another. (Level: Compact
8.2. Energy Flow and Material Cycles in the Environment
Enduring Understandings: Matter needed to sustain life is continually recycled among and between organisms and the environment. Energy from the Sun flows irreversibly through ecosystems and is conserved as organisms use and transform it.
8.2.A. In most ecosystems, energy enters as sunlight and is transformed by producers into a biologically usable form of matter through photosynthesis. That matter and energy then passes from organism to organism through food webs. Some energy is released from the system as heat. (Level: Essential)
8.2.B. Over time, matter is transferred repeatedly from one organism to another and between organisms and their physical environment. As in all material systems, the total amount of matter remains constant, even though its form and location change. (Level: Essential)
8.2.C. All organisms, including humans, are part of and depend on food webs. Food webs recycle matter continuously as organisms are decomposed after death to return food materials to the environment where it re-enters a food web. (Level: Important)
DE.CC6-8RS/TS. Reading Standards for Literacy in Science and Technical Subjects 6-12
Craft and Structure
CC6-8RS/TS4. Determine the meaning of symbols, key terms, and other domain-specific words and phrases as they are used in a specific scientific or technical context relevant to grades 6-8 texts and topics.

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