## Ecosystems: Interactions, Energy, and Dynamics

#### Students who demonstrate understanding can:

Use mathematical representations to support and revise explanations based on evidence about factors affecting biodiversity and populations in ecosystems of different scales. HS-LS2-2

Clarification Statement and Assessment Boundary

Clarification Statement: Examples of mathematical representations include finding the average, determining trends, and using graphical comparisons of multiple sets of data.

Assessment Boundary: Assessment is limited to provided data.

##### Science and Engineering Practices

Using Mathematics and Computational Thinking

Mathematical and computational thinking in 9–12 builds on K–8 experiences and progresses to using algebraic thinking and analysis, a range of linear and nonlinear functions including trigonometric functions, exponentials and logarithms, and computational tools for statistical analysis to analyze, represent, and model data. Simple computational simulations are created and used based on mathematical models of basic assumptions.

###### Connections to Nature of Science

Scientific Knowledge Is Open to Revision in Light of New Evidence

##### Crosscutting Concepts

Scale, Proportion, and Quantity

### Common Core State Standards Connections

ELA/Literacy
• RST.11-12.1 - Cite specific textual evidence to support analysis of science and technical texts, attending to important distinctions the author makes and to any gaps or inconsistencies in the account. (HS-LS2-2)
Mathematics
• HSN-Q.A.1 - Use units as a way to understand problems and to guide the solution of multi-step problems; choose and interpret units consistently in formulas; choose and interpret the scale and the origin in graphs and data displays. (HS-LS2-2)
• HSN-Q.A.2 - Define appropriate quantities for the purpose of descriptive modeling. (HS-LS2-2)
• HSN-Q.A.3 - Choose a level of accuracy appropriate to limitations on measurement when reporting quantities. (HS-LS2-2)
• MP.2 - Reason abstractly and quantitatively. (HS-LS2-2)
• MP.4 - Model with mathematics. (HS-LS2-2)

National Science Teaching Association
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