Growth of organisms and during periods of abundant population increases are and scarce resources.] limited by access to MS-LS2-3. Develop a model resources. (MS-LS2-1) to describe the cycling of matter and flow of energy LS2.B: Cycle of Matter and among living and nonliving Energy Transfer in parts of an Ecosystems (8th Grade) ecosystem. [Clarification Food webs are models that Statement: Emphasis is on demonstrate how matter describing the conservation and energy is transferred of matter and flow of energy between producers, into and out of various consumers, and ecosystems, and on decomposers as the three defining the boundaries of groups interact within an the system.] [Assessment ecosystem. Transfers of Boundary: Assessment does matter into and out of the not include the use of physical environment occur chemical reactions to at every level. Decomposers describe the processes.] recycle nutrients from dead MS-LS2-4. Construct an plant or animal matter back argument supported by to the soil in terrestrial empirical evidence that environments or to the changes to physical or water in aquatic biological components of an environments. The atoms ecosystem affect that make up the organisms populations. [Clarification in an ecosystem are cycled Statement: Emphasis is on repeatedly between the recognizing patterns in data living and nonliving parts of and making warranted the ecosystem. (MS-LS2-3) inferences about changes LS2.C: Ecosystem Dynamics, in populations, and on Functioning, and Resilience evaluating empirical (8th evidence supporting Ecosystems are dynamic in arguments about changes to nature; their characteristics ecosystems.] can vary over time. Disruptions to any physical or biological component of
Growth of organisms and population increases are limited by access to resources. (MS-LS2-1) LS2.B: Cycle of Matter and Energy Transfer in Ecosystems (8th Grade) Food webs are models that demonstrate how matter and energy is transferred between producers, consumers, and decomposers as the three groups interact within an ecosystem. Transfers of matter into and out of the physical environment occur at every level. Decomposers recycle nutrients from dead plant or animal matter back to the soil in terrestrial environments or to the water in aquatic environments. The atoms that make up the organisms in an ecosystem are cycled repeatedly between the living and nonliving parts of the ecosystem. (MS-LS2-3) LS2.C: Ecosystem Dynamics, Functioning, and Resilience (8th Ecosystems are dynamic in nature; their characteristics can vary over time. Disruptions to any physical or biological component of during periods of abundant and scarce resources.] MS-LS2-3. Develop a model to describe the cycling of matter and flow of energy among living and nonliving parts of an ecosystem. [Clarification Statement: Emphasis is on describing the conservation of matter and flow of energy into and out of various ecosystems, and on defining the boundaries of the system.] [Assessment Boundary: Assessment does not include the use of chemical reactions to describe the processes.] MS-LS2-4. Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations. [Clarification Statement: Emphasis is on recognizing patterns in data and making warranted inferences about changes in populations, and on evaluating empirical evidence supporting arguments about changes to ecosystems.]
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