LS3- Groups of organisms show evidence of change over time (structures, behaviors and biochemistry).


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Click on the GSE numbers, e.g PS1 (K-2) - POC - 2, in the table below to reach additional information about each GSE.

Grade Span Expectations (K-4)


Grade Span Expectations (5-8)

Grade Span Expectations (HS)


LS3 (K-2) - 7
Students demonstrate an understanding of equilibrium in an ecosystem by …


Currently no GSEs for this target at K-2 Grade Span
LS3 (3-4) - 7
Students demonstrate an understanding of equilibrium in an ecosystem by …

7a explaining what plants or animals might do if their environment changes (e.g., changing food supply or habitat due to fire, human impact, sudden weather-related changes).

7b explaining how the balance of the ecosystem can be disturbed (e.g., how does overpopulation of a species affect the rest of the ecosystem).


LS3 (5-6) - 8
Students demonstrate an understanding of classification of organisms by …

8a stating the value of, or reasons for, classification systems.

8b following a taxonomic key to identify a given organism (e.g. flowering and non-flowering plants).
LS3 (7-8) - 8
Students demonstrate an understanding of classification of organisms by …

8a sorting organisms with similar characteristics into groups based on internal and external structures.

8b explaining how species with similar evolutionary histories/characteristics are classified more closely together with some organisms than others (e.g., a fish and human have more common with each other than a fish and jelly fish)

8c recognizing the classification system used in modern biology.

LS3 (9-11) - 6
Students will demonstrate their understanding of the degree of genetic relationships among organisms by …

6a using given data (diagrams, charts, narratives, etc.) and advances in technology to explain how our understanding of genetic variation has developed over time.
Example Extension(s)
LS3 (Ext) - 6
Students will demonstrate their understanding of the degree of genetic relationships among organisms by …

6aa describing how the Human Genome Project has contributed to our understanding of both human heredity and the commonality of DNA sequences among organisms.