Carolina Biological-Knowledge Center – April 2024

2nd Grade

Matter and Its Interactions


Students who demonstrate understanding can:



Construct an argument with evidence that some changes caused by heating or cooling can be reversed and some cannot. 2-PS1-4

Clarification Statement and Assessment Boundary

Clarification Statement: Examples of reversible changes could include materials such as water and butter at different temperatures. Examples of irreversible changes could include cooking an egg, freezing a plant leaf, and heating paper.

Assessment Boundary: none

Science and Engineering Practices

Engaging in Argument from Evidence

Engaging in argument from evidence in K–2 builds on prior experiences and progresses to comparing ideas and representations about the natural and designed world(s).

Construct an argument with evidence to support a claim. (2-PS1-4)

Connections to Nature of Science

Science Models, Laws, Mechanisms, and Theories Explain Natural Phenomena

Science searches for cause and effect relationships to explain natural events. (2-PS1-4)

Common Core State Standards Connections

  • RI.2.1 - Ask and answer such questions as who, what, where, when, why, and how to demonstrate understanding of key details in a text. (2-PS1-4)
  • 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-PS1-4)
  • RI.2.8 - Describe how reasons support specific points the author makes in a text. (2-PS1-4)
  • W.2.1 - Write opinion pieces in which they introduce the topic or book they are writing about, state an opinion, supply reasons that support the opinion, use linking words (e.g., because, and, also) to connect opinion and reasons, and provide a concluding statement or section. (2-PS1-4)