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

The resources above correspond to the standards listed below:

Maine Standards

ME.A. Unifying Themes: Students apply the principles of systems, models, constancy and change, and scale in science and technology.
A.3. Constancy and Change: Students describe how patterns of change vary in physical, biological, and technological systems.
A.3.a. Describe systems that are changing including ecosystems, Earth systems, and technologies.
A.3.b. Give examples of systems including ecosystems, Earth systems, and technologies that appear to be unchanging (even though things may be changing within the system) and identify any feedback mechanisms that may be modifying the changes.
ME.CC.RST.6-8. Reading Standards for Literacy in Science and Technical Subjects
Craft and Structure
RST.6-8.4. 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.
ME.E. The Living Environment: Students understand that cells are the basic unit of life, that all life as we know it has evolved through genetic transfer and natural selection to create a great diversity of organisms, and that these organisms create interdependent webs through which matter and energy flow. Students understand similarities and differences between humans and other organisms and the interconnections of these interdependent webs.
E.2. Ecosystems: Students examine how the characteristics of the physical, non-living (abiotic) environment, the types and behaviors of living (biotic) organisms, and the flow of matter and energy affect organisms and the ecosystem of which they are part.
E.2.b. Describe ways in which two types of organisms may interact (including competition, predator/prey, producer/consumer/decomposer, parasitism, and mutualism) and describe the positive and negative consequences of such interactions.
E.2.c. Describe the source and flow of energy in the two major food webs, terrestrial and marine.
E.2.d. Describe how matter and energy change from one form to another in living things and in the physical environment.
E.2.e. Explain that the total amount of matter in the environment stays the same even as its form and location change.

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