## Earth's Systems

#### Students who demonstrate understanding can:

Compare multiple solutions designed to slow or prevent wind or water from changing the shape of the land. 2-ESS2-1

Clarification Statement and Assessment Boundary

Clarification Statement: Examples of solutions could include different designs of dikes and windbreaks to hold back wind and water, and different designs for using shrubs, grass, and trees to hold back the land.

Assessment Boundary: none

##### Science and Engineering Practices

Constructing Explanations and Designing Solutions

Constructing explanations and designing solutions in K–2 builds on prior experiences and progresses to the use of evidence and ideas in constructing evidence-based accounts of natural phenomenon and designing solutions.

##### Disciplinary Core Ideas

ESS2.AEarth Materials and Systems

ETS1.COptimizing the Design Solution

##### Crosscutting Concepts

Stability and Change

###### Connections to Engineering, Technology, and Applications of Science

Influence of Science, Engineering, and Technology on Society and the Natural World

### Common Core State Standards Connections

ELA/Literacy
• RI.2.3 - Describe the connection between a series of historical events, scientific ideas or concepts, or steps in technical procedures in a text. (2-ESS2-1)
• RI.2.9 - Compare and contrast the most important points presented by two texts on the same topic. (2-ESS2-1)
Mathematics
• 2.MD.B.5 - Use addition and subtraction within 100 to solve word problems involving lengths that are given in the same units, e.g., by using drawings (such as drawings of rulers) and equations with a symbol for the unknown number to represent the problem. (2-ESS2-1)
• MP.2 - Reason abstractly and quantitatively. (2-ESS2-1)
• MP.4 - Model with mathematics. (2-ESS2-1)
• MP.5 - Use appropriate tools strategically. (2-ESS2-1)

National Science Teaching Association
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